Hainan Island is one of the largest islands in China and is located in the Indo-Burma biodiversity hotspot region.Despite its ecological significance,comprehensive population genetic studies of key marine organisms al...Hainan Island is one of the largest islands in China and is located in the Indo-Burma biodiversity hotspot region.Despite its ecological significance,comprehensive population genetic studies of key marine organisms along the entire coastline of Hainan Island have not been reported.This study examined the genetic diversity and population structure of the widely distributed oyster Saccostrea malabonensis around Hainan Island with analyzing mitochondrial COI gene sequences.The impacts of geographical,environmental and anthropogenic factors on genetic differentiation were also investigated.The results revealed a significant AT bias in the COI gene sequences,with transitions as the main mutation type.A total of 103 variable sites and 107 haplotypes were identified from480 COI sequences,with haplotype diversities from 0.067 to 0.782,and nucleotide diversities between 0.00011 and 0.00278.AMOVA analysis indicated that 86.65%of the variation occurred within one population while 13.35%among different populations.The average genetic distance across 16 populations was 0.00169,and the average genetic differentiation index was 0.13353.Distinct population patterns can be observed.The populations of Tonghai Village(THV)and Gangmen Mountain(GMM)in Lingshui showed similar genetic structures while those of Wanquan River Estuary(WQRE,Qionghai)and Wuzhizhou Island(WZZI,Sanya)displayed divergent evolutionary trends.Cluster analysis grouped the 480 individuals of S.malabonensis into six subpopulations.These findings are helpful for developing conservation strategies and genetic breeding programs,and are also helpful for understanding the evolutionary history of this oyster species in Hainan Island.展开更多
BACKGROUND Alcohol can cause alcoholic fatty liver,alcoholic steatohepatitis,alcoholic liver cirrhosis(ALC),and hepatocellular carcinoma.China has become the secondlargest country in the world in terms of alcohol cons...BACKGROUND Alcohol can cause alcoholic fatty liver,alcoholic steatohepatitis,alcoholic liver cirrhosis(ALC),and hepatocellular carcinoma.China has become the secondlargest country in the world in terms of alcohol consumption,lacking national epidemiological data on alcoholic liver disease(ALD).AIM To understand the incidence and characteristics of ALD in Hainan Province of China.METHODS From October 2022 to April 2023,a stratified proportional multi-stage whole population sampling method was adopted to select permanent residents of Haikou,Sanya,Qionghai,Dongfang,and Wuzhishan in Hainan Province to carry out questionnaire surveys,blood tests,and ultrasound examinations of the liver.RESULTS A total of 2704 valid questionnaires were obtained from residents aged 15-93 years old.The rates of drinking,hazardous drinking,and harmful drinking were 31.73%,14.53%,and 5.03%,respectively.The above rates were higher for males than for females,increasing with income,and the rates for ethnic minorities,such as Li,were higher than for Han Chinese(P<0.05).Drinking rates increased with literacy(P<0.05).Drinking rate and hazardous drinking rate decreased with age,were higher for residents of agricultural households than non-agricultural households,and higher for married than unmarried individuals(P<0.05).The total number of patients with ALD was 142,with a detection rate of 5.25%.ALD detection rate was higher for males than females,decreased with age,and higher with income(P<0.05).Patients with ALD included 48(33.8%)cases of mild ALD,64(45.1%)cases of alcoholic fatty liver,18(12.7%)cases of alcoholic steatohepatitis,and 12(8.5%)cases of ALC.The proportion of those who consumed more than 80 g of alcohol per day increased as they progressed from mild ALD to ALC stage.Diabetes mellitus and hyperlipidemia were easily combined in some cases,accounting for 25(17.6%)and 80(56.3%),respectively.The average daily alcohol consumption of ALD patients of Li ethnicity≥80 g was significantly more than that of Han ethnicity(χ2=5.652,P=0.02),and was predominantly among those who drank large amounts of alcohol intermittently(χ2=89.093,P<0.001).CONCLUSION The rates of drinking,hazardous drinking,harmful drinking,and detection of ALD in Hainan Province need to be paid attention to by advocating a healthy lifestyle,such as abstinence and limiting alcohol consumption.展开更多
This paper explores the application of blockchain in Hainan’s supply chain finance,analyzing its impact on enhancing market transparency,optimizing processes,and addressing challenges like information asymmetry and i...This paper explores the application of blockchain in Hainan’s supply chain finance,analyzing its impact on enhancing market transparency,optimizing processes,and addressing challenges like information asymmetry and inefficient credit transmission.It examines technical and security issues such as scalability and cross-chain interoperability,proposing solutions like layered architectures and privacy computing.The study highlights blockchain’s role in empowering cross-border trade,tropical agriculture,and SME financing,aiming to provide a reference for Hainan Free Trade Port’s financial digital transformation.展开更多
Jerched on the 18th parallel north-often called the“golden latitude”for its optimal climate and environment conditions,shared by renowned attractions like Bali in Indonesia,the Maldives,and Hawaii of the United Sta...Jerched on the 18th parallel north-often called the“golden latitude”for its optimal climate and environment conditions,shared by renowned attractions like Bali in Indonesia,the Maldives,and Hawaii of the United States—the southernmost Chinese island province of Hainan has,over the past few decades,garnered national acclaim for its thriving tourism,senior healthcare and cultural sectors.Recently,Hainan has also gained attention as a burgeoning hub for international education within China.展开更多
Hainan boasts unique natural and cultural resources,offering tremendous potential for development in the tourism performance sector.This paper delves into the significance and value of creating a regional brand for Ha...Hainan boasts unique natural and cultural resources,offering tremendous potential for development in the tourism performance sector.This paper delves into the significance and value of creating a regional brand for Hainan’s tourism performances.Based on an analysis of the current state of Hainan’s tourism performance,it explores the challenges faced and proposes a multi-faceted approach to building a regional brand,including resource integration,product innovation,brand communication,and talent cultivation.The aim is to promote high-quality development in Hainan’s tourism performance industry,enhance the cultural appeal and market competitiveness of Hainan’s tourism,and support the construction of Hainan as an international center for tourism consumption.展开更多
With the rapid development of global tourism,IP(intellectual property)tourism,as an emerging model,is gradually becoming a significant force in promoting high-quality growth in the industry.Hainan,China’s only tropic...With the rapid development of global tourism,IP(intellectual property)tourism,as an emerging model,is gradually becoming a significant force in promoting high-quality growth in the industry.Hainan,China’s only tropical island province,boasts unique natural scenery and abundant tourism resources.The high-quality development of its tourism sector is crucial for boosting regional economic growth and enhancing international influence.This paper will analyze the current status,existing issues,and strategies for the high-quality development of Hainan’s tourism industry from the perspective of IP tourism,aiming to provide valuable insights for the future development of Hainan’s tourism sector.展开更多
This study focuses on vocational undergraduate institutions in Hainan Province,exploring the current status,issues,and optimization strategies for integrating ideological and political education into college English c...This study focuses on vocational undergraduate institutions in Hainan Province,exploring the current status,issues,and optimization strategies for integrating ideological and political education into college English courses.Through questionnaires,interviews,and classroom observations,the research identifies problems such as insufficient integration of ideological content,monotonous teaching methods,and low student engagement.To address these issues,this paper proposes a four-in-one teaching strategy encompassing teaching objectives,content,methods,and evaluation mechanisms.The effectiveness of this strategy is validated through teaching practices.The results indicate that the optimized teaching strategy significantly enhances students’English proficiency and ideological literacy,providing practical references for the reform of ideological and political education in college English courses at vocational undergraduate institutions.展开更多
In recent years,numerous internet-famous cities have rapidly gained popularity on social media through their unique tourism appeal,attracting massive tourist flows and profoundly impacting local cultural tourism indus...In recent years,numerous internet-famous cities have rapidly gained popularity on social media through their unique tourism appeal,attracting massive tourist flows and profoundly impacting local cultural tourism industries.This paper analyzes the reasons behind these cities’breakout success and explores their development models,offering insights for Hainan’s cultural tourism sector.The study reveals that such urban phenomena primarily stem from four key factors:crafting distinctive city IPs,implementing innovative marketing strategies,providing premium travel experiences,and building community-driven city identities.Drawing from these lessons,Hainan’s cultural tourism industry should leverage its unique cultural resources to develop tourism IPs,adopt new media-driven marketing approaches,enhance service quality,strengthen brand building,and promote high-quality development to boost the region’s tourism visibility and competitiveness.展开更多
With the development of global economic integration,building a world-class facilitating business environment has become an urgent need for Hainan Free Trade Port.To solve the existing problems in financial policies,le...With the development of global economic integration,building a world-class facilitating business environment has become an urgent need for Hainan Free Trade Port.To solve the existing problems in financial policies,legal supervision,and other aspects,this paper takes Hainan Free Trade Port as an example to analyze and study its institutional integration strategy for creating a world-class facilitating business environment.The specific integration strategies are summarized to promote the internationalization and facilitation of the business environment of Hainan Free Trade Port and promote the high development of the local economy.展开更多
Rapid climate and cropland use changes in recent decades have posed major challenges to food security in China.Hainan Is-land is the only tropical island in China and is blessed with natural conditions for crop produc...Rapid climate and cropland use changes in recent decades have posed major challenges to food security in China.Hainan Is-land is the only tropical island in China and is blessed with natural conditions for crop production.This study first simulates the climate scenarios of Hainan Island for 2030,2040 and 2050 under the four Socio-economic Pathways(SSPs)based on the climate models in ScenarioMIP of Coupled Model Intercomparison Project Phase 6(CMIP6),and then simulates the land use scenarios of Hainan Island for 2030,2040 and 2050 based on the Cellular Automata(CA)-Markov model.Finally,based on the Global Agro-Ecological Zones(GAEZ)model,the rice potential yield in Hainan Island for 2030,2040 and 2050 are simulated,and the effects of future climate and cropland use changes on rice potential yields are investigated.The results show that:1)from 2020 to 2050,mean maximum temperature first decreases and then increases,while mean minimum temperature increase sharply followed by a leveling off under the four SSPs.Precipitation decreases and then increases under other three SSPs except SSP2-4.5.Net solar radiation increases continuously under SSP1-2.6,2-4.5,and 5-8.5,and has the lowest simulated values under SSP3-7.0.Mean wind speed increases continuously under SSP1-2.6,fluctuates more under SSP2-4.5 and SSP5-8.5,and increases slowly and then decreases sharply under SSP3-7.0.Relative humidity basically decreases continuously under the four SSPs.2)Areas of paddy field are 302.49 thousand,302.41 thousand and 302.71 thou-sand ha for 2030,2040 and 2050,respectively,all less than that in 2020.Paddy field is mainly converted into built-up land and wood-land.As for the conversion of other land types to paddy field,woodland is the main source.3)Under the effects of future climate and cropland use changes,the mean potential productions in Hainan Island under the four SSPs increase 1.17 million,1.13 million and 1.11 million t,respectively,and the mean potential yields increase 3873.21,3766.71 and 3672.38 kg/ha,respectively for the three periods.The largest increases in mean rice potential production and mean potential yield are 1.21 million t and 4008.00 kg/ha,1.16 million t and 3846.65 kg/ha,as well as 1.13 million t and 3732.75 kg/ha,respectively under SSP 3-7.0,indicating that SSP3-7.0 is the most suitable scenario for rice growth.This study could provide scientific basis for crop planting planning and agricultural policy adjustment.展开更多
With the establishment of Hainan Free Trade Port,the small and medium-sized enterprises in Hainan Free Trade Port have developed and grown in the continuously optimized enterprise environment.The continuous establishm...With the establishment of Hainan Free Trade Port,the small and medium-sized enterprises in Hainan Free Trade Port have developed and grown in the continuously optimized enterprise environment.The continuous establishment of a large number of small and micro enterprises makes its social and economic development play a non-negligible role.However,due to the small size and insufficient economic strength of small and micro enterprises,their status in the financial system is often very humble.Therefore,under normal circumstances,small and micro enterprises are faced with financing difficulties and high costs,which has a great side effect on their development.The proposal and continuous development of digital inclusive finance,so that small and micro enterprises in access to a wide range of financing opportunities at the same time,their financing methods are more convenient than in the past,the cost is getting lower and lower.This paper deeply discusses the role of digital inclusive finance in easing the financing constraints of small and micro enterprises and puts forward corresponding suggestions[1].展开更多
There are almost 400 species(containing 8 varieties)of pteridophytes on Hainan Island,belonging to 43 families and 114 genera,one third of which are officinal.To understand the distribution of pteridophytes resources ...There are almost 400 species(containing 8 varieties)of pteridophytes on Hainan Island,belonging to 43 families and 114 genera,one third of which are officinal.To understand the distribution of pteridophytes resources of Hainan Island,we conducted this survey mainly by photographing the habitat,plant morphology,sorus and specific traits of some pteridophytes.The results showed that nearly 32 families and 94 species were recorded.These pteridophyte herb resources play important roles in medical treatment of native Li nationality people.展开更多
[Objective]The aim was to study on the characteristics of soil organic carbon and nitrogen in rubber （Hevea brasiliensis Muell-Arg） plantations at different age stages in the western region of Hainan Island,so as to...[Objective]The aim was to study on the characteristics of soil organic carbon and nitrogen in rubber （Hevea brasiliensis Muell-Arg） plantations at different age stages in the western region of Hainan Island,so as to evaluate the ecological benefits of rubber plantations and provide basic data for studying the effect of tropical land utilization/cover change on the global carbon and nitrogen cycle. [Method]The situs was in Danzhou city,western region of Hainan Island,and the samples were four kinds of rubber plantations soil at different ages and one kind of control check （pepper,Piper nigrum L.） soil. In this research,four quadrats were set up in each sample,and the size of each was 20 cm×20 cm. Four specimens were gathered from four layers of 0-15,15-30,30-45,45-60,and the average of them was the last analysis result of each sample. Soil density was measured by cutting ring method,soil containing and hygroscopic water was detected by oven drying method,soil organic carbon （SOC） was measured by low temperature heated outside potassium dichromate oxidation-colorimetry method,and soil total nitrogen （STN） was detected by semimicro Kjeldahl method. [Result]SOC contents of different layers in rubber plantations soil at different age stages （including the CK pepper soil,the same as below） varied little,and the content of SOC in surface layer （0-15 cm） was higher,while the underlayer （45-60 cm） was lower than the average value; there was significant difference in SOC content among different kinds of soil,and the content was of 6.03-7.78 g/kg,tapping young trees （7 years） CK pepper mature age trees （30 years） prophase of young trees （2 years） tapping trees （16 years）; there was no significant difference in SOC storage among different kinds of soil,and the storage was of 61.33-74.29 t/hm2,mature age trees （30 years） tapping young trees （7 years） prophase of young trees （2 years） CK pepper tapping trees （16 years）; there was significant difference in STN content among rubber plantations soil at different age stages,the content was of 410.86-664.14 mg/kg2,CK pepper tapping young trees （7 years） prophase of young trees （2 years） mature age trees （30 years） tapping trees （16 years）,and STN content of tapping trees （16 years） soil was extremely lowest; there was significant difference in C/N ratio among different kinds of soil,the ratio was of 10.94-14.47,and the ratio of tapping trees （16 years） mature age trees （30 years） tapping young trees （7 years） CK pepper prophase of young trees （2 years）. [Conclusion]There wasn＇t unhealthy effect of rubber trees planted in tropical area on the content and storage of SOC,the content of STN and the ratio of C/N. there was no significant difference between rubber plantations and CK pepper soil,and the effects of rubber plantation on soil carbon-nitrogen was similar to that of other tropical crops （such as pepper）.展开更多
Hainan Island is the biggest supplier of domestic rattan canes in China and is considered the best area to develop rattan plantation in large-scale. This paper discusses the rattan production in Hainan Island on the b...Hainan Island is the biggest supplier of domestic rattan canes in China and is considered the best area to develop rattan plantation in large-scale. This paper discusses the rattan production in Hainan Island on the basis of comprehensively collected information on rattan through interviewing with farmers, middle man, manufacture and official, on-site observation and literatures. The stock of available rattan is more than 25×106kg, but the real production annually is 4×105 kg. The area of rattan plantation established during 2000-2005 was about 10000 hm2, however, they don not produce yet. Four indigenous rattan species （C. Simplicifolius, C. Faberii, C. Tetradactylus, D. margaritae ） and three kinds of exotic canes are mainly utilized in Hainan island. Large quality of canes is treated as timber regulated by government, tax should be paid and a license should be applied from the government if canes are transport out of Hainan Island. The production-to-consumption flow of rattan in Hainan Island was drawn out based on the investigation. Constraints and advantages of the rattan sector in Hainan are identified and recommendations are proposed finally.展开更多
[Objective] This study investigated the spatial characteristics of counties （cities） with comparative advantages in watermelon and melon production to provide reference bases in formulating strategies for the develo...[Objective] This study investigated the spatial characteristics of counties （cities） with comparative advantages in watermelon and melon production to provide reference bases in formulating strategies for the development of watermelon and melon industries in Hainan Province. [Method] By using the sowing area, total yield, and yield per unit area of watermelon and melon in Hainan Province as research u- nits, the yield comparative advantage （YCA）, efficiency comparative advantage （E- CA）, scale comparative advantage （SCA）, concentration ratio comparative advantage （CRCA）, comprehensive comparative advantage （CCA）, ratio of yield per unit area （RYPA）, sowing area ratio （SAR）, and distribution characteristics of watermelon and melon were systematically analyzed. By referring to the agricultural statistic data of 18 counties （cities） in Hainan Province, indexes for each research unit （i.e., the YCA index, ECA index, SCA index, CRCA index, CCA index, RYPA index, and SAR index） were established and calculated to determine the comparative advantage of watermelon and melon production in Hainan Province. A spatial expression of the research result on a map was conducted by using GIS software. [Result] Seven counties （cities） exhibited comparative advantages in watermelon production, namely, Lingshui, Wanning, Wenchang, Dongfang, Sanya, Ledong, and Changjiang. The Eastern and Southern Hainan Provinces had CCAs, and the Western and Northern Hainan Provinces could be reserved for future development. For melon production, four counties （cities） exhibited comparative advantages, namely, Ledong, Lingshui, Sanya, and Dongfang. The Southern Hainan Province had CCA, whereas the West- ern Hainan Province could be reserved for later development. [Conclusion] The result has showed that establishing watermelon and melon as dominant agricultural prod- ucts is necessary for the future development of the industry and for the formulation of a layout of regions with advantages, where key support and construction should be provided preferentially with the aim to raise the yield, quality, and market com- petitiveness of products.展开更多
Wintering waterbirds surveys were conducted throughout the coastal areas of Hainan,China,from 2003 to 2005,with the aim of further strengthening the conservation and management of wetlands in Hainan Island.A total of ...Wintering waterbirds surveys were conducted throughout the coastal areas of Hainan,China,from 2003 to 2005,with the aim of further strengthening the conservation and management of wetlands in Hainan Island.A total of 68 species were recorded at 20 coastal wetlands.Three recently found wintering sites for the globally endangered Black-faced Spoonbill (Plataleaminor),i.e.Houshui Bay of Lingao,Beili Bay of Dongfang Counties and Sanya River in Sanya City were then extensively monitored during a period of 2003-2009.The largest number of birds were egrets and herons,followed by shorebirds,gulls and terns.On average,the total number of species and individuals at sites with mangrove forests were significantly greater than those of sites without mangrove forests.Some sites,important for conservation,were identified,such as Bopu Bay,Huanglonggang,Houshui Bay,Yangpugang,Beili Bay,Yinggehai,Sanya River,Qinlangang and Dongzhaigang.Thus,human disturbance at these important sites should be avoided.展开更多
Megaselia wuzhiensis, sp. nov., from Mt. Wuzhi, Hainan Province is described. It is similar to M. atricornis Beyer, but differs in Costal Ratios and hypopygium.
[Objective] To research the content of Pb element in latosol of Hainan island and to assess its environmental quality.[Method] Samples were selected for lab analysis.27 samples from different landforms of Hainan Islan...[Objective] To research the content of Pb element in latosol of Hainan island and to assess its environmental quality.[Method] Samples were selected for lab analysis.27 samples from different landforms of Hainan Island were selected（the same place was sampled for three times） to analyze the content of Pb in latosol of Hainan Island,study the spatial distribution feature of this element in latosol from different places and evaluate the content of Pb element in latosol of Hainan Island by geo-accumulation index.[Result] The content of Pb generally stays at high level in latosol of Hainan Island;however,the mean content of Pb in east Hainan is lower than the mean value of west Hainan;vertically,the mean content of Pb shows descending order from hills,mountainous area to plain;the pollution assessment result showed that latosol of Hainan Island was hardly polluted by Pb element and only its content in the latosol from middle,south area stays at high level.[Conclusion] The research provided scientific reference for constructing a national tropical modern agricultural base in Hainan as well as controlling Pb pollution.展开更多
The influence of formula fertilization optimization on dry rubber yield and economic benefits of the rubber plantation in Hainan Longjiang Farm were studied by using ＂contrast＂ design method of fertilizer field expe...The influence of formula fertilization optimization on dry rubber yield and economic benefits of the rubber plantation in Hainan Longjiang Farm were studied by using ＂contrast＂ design method of fertilizer field experiments. The results showed that the actual production rate reached 4.61% and the net production rate of dry rubber reached 3.97% by application of optimized fertilization formula. Analysis of variance showed that the average dry rubber yield in optimization of formula fertil- ization area was significantly higher than that of conventional area. The results also indicated that the optimization of formula fertilization had obvious economic benefits, and each rubber tree reduced cost and increased 9.95 yuan on average after the test.展开更多
[Objective] The paper was to carry out ecological geochemical survey and ecological risk assessment on the heavy metals in latosol in western area of Hainan Island.[Method] The contents of six heavy metals including C...[Objective] The paper was to carry out ecological geochemical survey and ecological risk assessment on the heavy metals in latosol in western area of Hainan Island.[Method] The contents of six heavy metals including Cr,Cu,Zn,As,Cd and Pb in latosol in western area of Hainan Island were analyzed.Single-factor index method and Hakanson ecological risk index method were used to evaluate the integrated pollution effect of heavy metals in latosol.[Result] The average contents of Cr,Cu,Zn,As,Cd and Pb in latosol in western area of Hainan Island were 65.57,35.16,93.56,8.50,0.24 and 79.29 mg/kg,respectively.The major pollution factor of heavy metal was Pb.The sequence of influence factors of various heavy metals was PbCu = ZnCrAsCd.The potential ecological risk coefficient of various heavy metals was PbCdCuAsCrZn.The average value of potential ecological risk index（RI）was 45.14,belonging to low ecological risk range.[Conclusion] The heavy metal pollution in latosol in western area of Hainan Island belongs to slight pollution.展开更多
基金the Hainan Provincial Natural Science Foundation of China(No.325RC675)the Starting Research Fund from the Hainan University(No.KYQD(ZR)-21004)。
文摘Hainan Island is one of the largest islands in China and is located in the Indo-Burma biodiversity hotspot region.Despite its ecological significance,comprehensive population genetic studies of key marine organisms along the entire coastline of Hainan Island have not been reported.This study examined the genetic diversity and population structure of the widely distributed oyster Saccostrea malabonensis around Hainan Island with analyzing mitochondrial COI gene sequences.The impacts of geographical,environmental and anthropogenic factors on genetic differentiation were also investigated.The results revealed a significant AT bias in the COI gene sequences,with transitions as the main mutation type.A total of 103 variable sites and 107 haplotypes were identified from480 COI sequences,with haplotype diversities from 0.067 to 0.782,and nucleotide diversities between 0.00011 and 0.00278.AMOVA analysis indicated that 86.65%of the variation occurred within one population while 13.35%among different populations.The average genetic distance across 16 populations was 0.00169,and the average genetic differentiation index was 0.13353.Distinct population patterns can be observed.The populations of Tonghai Village(THV)and Gangmen Mountain(GMM)in Lingshui showed similar genetic structures while those of Wanquan River Estuary(WQRE,Qionghai)and Wuzhizhou Island(WZZI,Sanya)displayed divergent evolutionary trends.Cluster analysis grouped the 480 individuals of S.malabonensis into six subpopulations.These findings are helpful for developing conservation strategies and genetic breeding programs,and are also helpful for understanding the evolutionary history of this oyster species in Hainan Island.
基金Supported by the Hainan Medical University Academic Enhancement Support Program,No.XSTS2025001National Clinical Key Speciality Capacity Building Project,No.202330+3 种基金Hainan Province Clinical Medical Center,No.2021818Specific Research Fund of The Innovation Platform for Academicians of Hainan Province,No.YSPTZX202313Joint Project on Health Science and Technology Innovation in Hainan Province,No.SQ2023WSJK0301Hainan Province Education Reform Project,No.hnjg2024-67.
文摘BACKGROUND Alcohol can cause alcoholic fatty liver,alcoholic steatohepatitis,alcoholic liver cirrhosis(ALC),and hepatocellular carcinoma.China has become the secondlargest country in the world in terms of alcohol consumption,lacking national epidemiological data on alcoholic liver disease(ALD).AIM To understand the incidence and characteristics of ALD in Hainan Province of China.METHODS From October 2022 to April 2023,a stratified proportional multi-stage whole population sampling method was adopted to select permanent residents of Haikou,Sanya,Qionghai,Dongfang,and Wuzhishan in Hainan Province to carry out questionnaire surveys,blood tests,and ultrasound examinations of the liver.RESULTS A total of 2704 valid questionnaires were obtained from residents aged 15-93 years old.The rates of drinking,hazardous drinking,and harmful drinking were 31.73%,14.53%,and 5.03%,respectively.The above rates were higher for males than for females,increasing with income,and the rates for ethnic minorities,such as Li,were higher than for Han Chinese(P<0.05).Drinking rates increased with literacy(P<0.05).Drinking rate and hazardous drinking rate decreased with age,were higher for residents of agricultural households than non-agricultural households,and higher for married than unmarried individuals(P<0.05).The total number of patients with ALD was 142,with a detection rate of 5.25%.ALD detection rate was higher for males than females,decreased with age,and higher with income(P<0.05).Patients with ALD included 48(33.8%)cases of mild ALD,64(45.1%)cases of alcoholic fatty liver,18(12.7%)cases of alcoholic steatohepatitis,and 12(8.5%)cases of ALC.The proportion of those who consumed more than 80 g of alcohol per day increased as they progressed from mild ALD to ALC stage.Diabetes mellitus and hyperlipidemia were easily combined in some cases,accounting for 25(17.6%)and 80(56.3%),respectively.The average daily alcohol consumption of ALD patients of Li ethnicity≥80 g was significantly more than that of Han ethnicity(χ2=5.652,P=0.02),and was predominantly among those who drank large amounts of alcohol intermittently(χ2=89.093,P<0.001).CONCLUSION The rates of drinking,hazardous drinking,harmful drinking,and detection of ALD in Hainan Province need to be paid attention to by advocating a healthy lifestyle,such as abstinence and limiting alcohol consumption.
基金2024 Hainan Provincial Higher Education Institutions Scientific Research Self-Funded Project“Research on‘Blockchain+Supply Chain Finance’and Financing of Small and Medium-sized Enterprises in Hainan Free Trade Harbor”(Hnky2024ZC-23)。
文摘This paper explores the application of blockchain in Hainan’s supply chain finance,analyzing its impact on enhancing market transparency,optimizing processes,and addressing challenges like information asymmetry and inefficient credit transmission.It examines technical and security issues such as scalability and cross-chain interoperability,proposing solutions like layered architectures and privacy computing.The study highlights blockchain’s role in empowering cross-border trade,tropical agriculture,and SME financing,aiming to provide a reference for Hainan Free Trade Port’s financial digital transformation.
文摘Jerched on the 18th parallel north-often called the“golden latitude”for its optimal climate and environment conditions,shared by renowned attractions like Bali in Indonesia,the Maldives,and Hawaii of the United States—the southernmost Chinese island province of Hainan has,over the past few decades,garnered national acclaim for its thriving tourism,senior healthcare and cultural sectors.Recently,Hainan has also gained attention as a burgeoning hub for international education within China.
基金Philosophy and Social Planning Project of Haikou City in 2025‘An Exploratory Study on Accelerating the Construction of“International Performing Arts Capital”in Haikou Under the Background of Hainan Free Trade Port’(Project No.:2025-ZCKT-96)。
文摘Hainan boasts unique natural and cultural resources,offering tremendous potential for development in the tourism performance sector.This paper delves into the significance and value of creating a regional brand for Hainan’s tourism performances.Based on an analysis of the current state of Hainan’s tourism performance,it explores the challenges faced and proposes a multi-faceted approach to building a regional brand,including resource integration,product innovation,brand communication,and talent cultivation.The aim is to promote high-quality development in Hainan’s tourism performance industry,enhance the cultural appeal and market competitiveness of Hainan’s tourism,and support the construction of Hainan as an international center for tourism consumption.
基金2024 Hainan Vocational University of Science and Technology Scientific Research Project“Research on the Training Mode of New Tourism Business under the Background of Hainan Free Trade Port”(HKKY2024-11)。
文摘With the rapid development of global tourism,IP(intellectual property)tourism,as an emerging model,is gradually becoming a significant force in promoting high-quality growth in the industry.Hainan,China’s only tropical island province,boasts unique natural scenery and abundant tourism resources.The high-quality development of its tourism sector is crucial for boosting regional economic growth and enhancing international influence.This paper will analyze the current status,existing issues,and strategies for the high-quality development of Hainan’s tourism industry from the perspective of IP tourism,aiming to provide valuable insights for the future development of Hainan’s tourism sector.
基金Ideological and Political Education Demonstration Project for the“College English”course at Hainan Vocational University of Science and Technology(HKSZ2024-20)。
文摘This study focuses on vocational undergraduate institutions in Hainan Province,exploring the current status,issues,and optimization strategies for integrating ideological and political education into college English courses.Through questionnaires,interviews,and classroom observations,the research identifies problems such as insufficient integration of ideological content,monotonous teaching methods,and low student engagement.To address these issues,this paper proposes a four-in-one teaching strategy encompassing teaching objectives,content,methods,and evaluation mechanisms.The effectiveness of this strategy is validated through teaching practices.The results indicate that the optimized teaching strategy significantly enhances students’English proficiency and ideological literacy,providing practical references for the reform of ideological and political education in college English courses at vocational undergraduate institutions.
基金Haikou Philosophy and Social Science Planning Project in 2025“Research on the Communication Path of Haikou Arcade Culture as City Name Card under the Background of Artificial Intelligence”(2025-ZCKT-100)。
文摘In recent years,numerous internet-famous cities have rapidly gained popularity on social media through their unique tourism appeal,attracting massive tourist flows and profoundly impacting local cultural tourism industries.This paper analyzes the reasons behind these cities’breakout success and explores their development models,offering insights for Hainan’s cultural tourism sector.The study reveals that such urban phenomena primarily stem from four key factors:crafting distinctive city IPs,implementing innovative marketing strategies,providing premium travel experiences,and building community-driven city identities.Drawing from these lessons,Hainan’s cultural tourism industry should leverage its unique cultural resources to develop tourism IPs,adopt new media-driven marketing approaches,enhance service quality,strengthen brand building,and promote high-quality development to boost the region’s tourism visibility and competitiveness.
基金General Scientific Research Project of Hainan Vocational University of Science and Technology-—Exploration of the Impact of Financial Reform on Enterprises in Hainan Free Trade Port(HKKY2024-13)。
文摘With the development of global economic integration,building a world-class facilitating business environment has become an urgent need for Hainan Free Trade Port.To solve the existing problems in financial policies,legal supervision,and other aspects,this paper takes Hainan Free Trade Port as an example to analyze and study its institutional integration strategy for creating a world-class facilitating business environment.The specific integration strategies are summarized to promote the internationalization and facilitation of the business environment of Hainan Free Trade Port and promote the high development of the local economy.
基金Under the auspices of Hainan Provincial Natural Science Foundation of China(No.321QN187,723RC466)Scientific Research Foundation of Hainan University(No.kyqd(sk)2135)Young Scholars Support Program of Hainan University(No.24QNFC-05)。
文摘Rapid climate and cropland use changes in recent decades have posed major challenges to food security in China.Hainan Is-land is the only tropical island in China and is blessed with natural conditions for crop production.This study first simulates the climate scenarios of Hainan Island for 2030,2040 and 2050 under the four Socio-economic Pathways(SSPs)based on the climate models in ScenarioMIP of Coupled Model Intercomparison Project Phase 6(CMIP6),and then simulates the land use scenarios of Hainan Island for 2030,2040 and 2050 based on the Cellular Automata(CA)-Markov model.Finally,based on the Global Agro-Ecological Zones(GAEZ)model,the rice potential yield in Hainan Island for 2030,2040 and 2050 are simulated,and the effects of future climate and cropland use changes on rice potential yields are investigated.The results show that:1)from 2020 to 2050,mean maximum temperature first decreases and then increases,while mean minimum temperature increase sharply followed by a leveling off under the four SSPs.Precipitation decreases and then increases under other three SSPs except SSP2-4.5.Net solar radiation increases continuously under SSP1-2.6,2-4.5,and 5-8.5,and has the lowest simulated values under SSP3-7.0.Mean wind speed increases continuously under SSP1-2.6,fluctuates more under SSP2-4.5 and SSP5-8.5,and increases slowly and then decreases sharply under SSP3-7.0.Relative humidity basically decreases continuously under the four SSPs.2)Areas of paddy field are 302.49 thousand,302.41 thousand and 302.71 thou-sand ha for 2030,2040 and 2050,respectively,all less than that in 2020.Paddy field is mainly converted into built-up land and wood-land.As for the conversion of other land types to paddy field,woodland is the main source.3)Under the effects of future climate and cropland use changes,the mean potential productions in Hainan Island under the four SSPs increase 1.17 million,1.13 million and 1.11 million t,respectively,and the mean potential yields increase 3873.21,3766.71 and 3672.38 kg/ha,respectively for the three periods.The largest increases in mean rice potential production and mean potential yield are 1.21 million t and 4008.00 kg/ha,1.16 million t and 3846.65 kg/ha,as well as 1.13 million t and 3732.75 kg/ha,respectively under SSP 3-7.0,indicating that SSP3-7.0 is the most suitable scenario for rice growth.This study could provide scientific basis for crop planting planning and agricultural policy adjustment.
文摘With the establishment of Hainan Free Trade Port,the small and medium-sized enterprises in Hainan Free Trade Port have developed and grown in the continuously optimized enterprise environment.The continuous establishment of a large number of small and micro enterprises makes its social and economic development play a non-negligible role.However,due to the small size and insufficient economic strength of small and micro enterprises,their status in the financial system is often very humble.Therefore,under normal circumstances,small and micro enterprises are faced with financing difficulties and high costs,which has a great side effect on their development.The proposal and continuous development of digital inclusive finance,so that small and micro enterprises in access to a wide range of financing opportunities at the same time,their financing methods are more convenient than in the past,the cost is getting lower and lower.This paper deeply discusses the role of digital inclusive finance in easing the financing constraints of small and micro enterprises and puts forward corresponding suggestions[1].
基金Supported by the Basic Professional Expenses of Tropical Crops Genetic Resources,CATAS(PZS019)Science and Technological Fund of South China University of Tropical Agriculture(Rnd0516)~~
文摘There are almost 400 species(containing 8 varieties)of pteridophytes on Hainan Island,belonging to 43 families and 114 genera,one third of which are officinal.To understand the distribution of pteridophytes resources of Hainan Island,we conducted this survey mainly by photographing the habitat,plant morphology,sorus and specific traits of some pteridophytes.The results showed that nearly 32 families and 94 species were recorded.These pteridophyte herb resources play important roles in medical treatment of native Li nationality people.
基金Supported by the Project of the Basic Research Operation Cost of State Level Research Institutes "Long-term Location Investigation of Basic Data for Rubber Production " ( XJSYWFZX-2008-14 and XJSYWFZX-2007-2)the Project Natural Sciences Fund of Hainan Province (807045)~~
文摘[Objective]The aim was to study on the characteristics of soil organic carbon and nitrogen in rubber （Hevea brasiliensis Muell-Arg） plantations at different age stages in the western region of Hainan Island,so as to evaluate the ecological benefits of rubber plantations and provide basic data for studying the effect of tropical land utilization/cover change on the global carbon and nitrogen cycle. [Method]The situs was in Danzhou city,western region of Hainan Island,and the samples were four kinds of rubber plantations soil at different ages and one kind of control check （pepper,Piper nigrum L.） soil. In this research,four quadrats were set up in each sample,and the size of each was 20 cm×20 cm. Four specimens were gathered from four layers of 0-15,15-30,30-45,45-60,and the average of them was the last analysis result of each sample. Soil density was measured by cutting ring method,soil containing and hygroscopic water was detected by oven drying method,soil organic carbon （SOC） was measured by low temperature heated outside potassium dichromate oxidation-colorimetry method,and soil total nitrogen （STN） was detected by semimicro Kjeldahl method. [Result]SOC contents of different layers in rubber plantations soil at different age stages （including the CK pepper soil,the same as below） varied little,and the content of SOC in surface layer （0-15 cm） was higher,while the underlayer （45-60 cm） was lower than the average value; there was significant difference in SOC content among different kinds of soil,and the content was of 6.03-7.78 g/kg,tapping young trees （7 years） CK pepper mature age trees （30 years） prophase of young trees （2 years） tapping trees （16 years）; there was no significant difference in SOC storage among different kinds of soil,and the storage was of 61.33-74.29 t/hm2,mature age trees （30 years） tapping young trees （7 years） prophase of young trees （2 years） CK pepper tapping trees （16 years）; there was significant difference in STN content among rubber plantations soil at different age stages,the content was of 410.86-664.14 mg/kg2,CK pepper tapping young trees （7 years） prophase of young trees （2 years） mature age trees （30 years） tapping trees （16 years）,and STN content of tapping trees （16 years） soil was extremely lowest; there was significant difference in C/N ratio among different kinds of soil,the ratio was of 10.94-14.47,and the ratio of tapping trees （16 years） mature age trees （30 years） tapping young trees （7 years） CK pepper prophase of young trees （2 years）. [Conclusion]There wasn＇t unhealthy effect of rubber trees planted in tropical area on the content and storage of SOC,the content of STN and the ratio of C/N. there was no significant difference between rubber plantations and CK pepper soil,and the effects of rubber plantation on soil carbon-nitrogen was similar to that of other tropical crops （such as pepper）.
基金This study is supported jointly by the 15th National Science and Technology Supporting Project Study and Demonstration of Key Technology to Utilize and Cultivate Rattan Resource Effectively (No.2006BAD19B09)the Science and Technology Project of Guangdong, Selection and Propagation of High-yielding Rattan Family (No. 2006B20201026).
文摘Hainan Island is the biggest supplier of domestic rattan canes in China and is considered the best area to develop rattan plantation in large-scale. This paper discusses the rattan production in Hainan Island on the basis of comprehensively collected information on rattan through interviewing with farmers, middle man, manufacture and official, on-site observation and literatures. The stock of available rattan is more than 25×106kg, but the real production annually is 4×105 kg. The area of rattan plantation established during 2000-2005 was about 10000 hm2, however, they don not produce yet. Four indigenous rattan species （C. Simplicifolius, C. Faberii, C. Tetradactylus, D. margaritae ） and three kinds of exotic canes are mainly utilized in Hainan island. Large quality of canes is treated as timber regulated by government, tax should be paid and a license should be applied from the government if canes are transport out of Hainan Island. The production-to-consumption flow of rattan in Hainan Island was drawn out based on the investigation. Constraints and advantages of the rattan sector in Hainan are identified and recommendations are proposed finally.
基金Supported by China Agricultural Research System(CARS-26)~~
文摘[Objective] This study investigated the spatial characteristics of counties （cities） with comparative advantages in watermelon and melon production to provide reference bases in formulating strategies for the development of watermelon and melon industries in Hainan Province. [Method] By using the sowing area, total yield, and yield per unit area of watermelon and melon in Hainan Province as research u- nits, the yield comparative advantage （YCA）, efficiency comparative advantage （E- CA）, scale comparative advantage （SCA）, concentration ratio comparative advantage （CRCA）, comprehensive comparative advantage （CCA）, ratio of yield per unit area （RYPA）, sowing area ratio （SAR）, and distribution characteristics of watermelon and melon were systematically analyzed. By referring to the agricultural statistic data of 18 counties （cities） in Hainan Province, indexes for each research unit （i.e., the YCA index, ECA index, SCA index, CRCA index, CCA index, RYPA index, and SAR index） were established and calculated to determine the comparative advantage of watermelon and melon production in Hainan Province. A spatial expression of the research result on a map was conducted by using GIS software. [Result] Seven counties （cities） exhibited comparative advantages in watermelon production, namely, Lingshui, Wanning, Wenchang, Dongfang, Sanya, Ledong, and Changjiang. The Eastern and Southern Hainan Provinces had CCAs, and the Western and Northern Hainan Provinces could be reserved for future development. For melon production, four counties （cities） exhibited comparative advantages, namely, Ledong, Lingshui, Sanya, and Dongfang. The Southern Hainan Province had CCA, whereas the West- ern Hainan Province could be reserved for later development. [Conclusion] The result has showed that establishing watermelon and melon as dominant agricultural prod- ucts is necessary for the future development of the industry and for the formulation of a layout of regions with advantages, where key support and construction should be provided preferentially with the aim to raise the yield, quality, and market com- petitiveness of products.
基金supported by the State Forestry Administration of China,WWF-China and the Forestry Department of Hainan Province
文摘Wintering waterbirds surveys were conducted throughout the coastal areas of Hainan,China,from 2003 to 2005,with the aim of further strengthening the conservation and management of wetlands in Hainan Island.A total of 68 species were recorded at 20 coastal wetlands.Three recently found wintering sites for the globally endangered Black-faced Spoonbill (Plataleaminor),i.e.Houshui Bay of Lingao,Beili Bay of Dongfang Counties and Sanya River in Sanya City were then extensively monitored during a period of 2003-2009.The largest number of birds were egrets and herons,followed by shorebirds,gulls and terns.On average,the total number of species and individuals at sites with mangrove forests were significantly greater than those of sites without mangrove forests.Some sites,important for conservation,were identified,such as Bopu Bay,Huanglonggang,Houshui Bay,Yangpugang,Beili Bay,Yinggehai,Sanya River,Qinlangang and Dongzhaigang.Thus,human disturbance at these important sites should be avoided.
基金This project was supported by the National Natural Science Foundation of China (30270187)
文摘Megaselia wuzhiensis, sp. nov., from Mt. Wuzhi, Hainan Province is described. It is similar to M. atricornis Beyer, but differs in Costal Ratios and hypopygium.
基金Supported by National Fund of Natural Sciences(40963001)~~
文摘[Objective] To research the content of Pb element in latosol of Hainan island and to assess its environmental quality.[Method] Samples were selected for lab analysis.27 samples from different landforms of Hainan Island were selected（the same place was sampled for three times） to analyze the content of Pb in latosol of Hainan Island,study the spatial distribution feature of this element in latosol from different places and evaluate the content of Pb element in latosol of Hainan Island by geo-accumulation index.[Result] The content of Pb generally stays at high level in latosol of Hainan Island;however,the mean content of Pb in east Hainan is lower than the mean value of west Hainan;vertically,the mean content of Pb shows descending order from hills,mountainous area to plain;the pollution assessment result showed that latosol of Hainan Island was hardly polluted by Pb element and only its content in the latosol from middle,south area stays at high level.[Conclusion] The research provided scientific reference for constructing a national tropical modern agricultural base in Hainan as well as controlling Pb pollution.
基金Supported by Key Science and Technology Project of Hainan Land Reclamation Bureau([2009]57)~~
文摘The influence of formula fertilization optimization on dry rubber yield and economic benefits of the rubber plantation in Hainan Longjiang Farm were studied by using ＂contrast＂ design method of fertilizer field experiments. The results showed that the actual production rate reached 4.61% and the net production rate of dry rubber reached 3.97% by application of optimized fertilization formula. Analysis of variance showed that the average dry rubber yield in optimization of formula fertil- ization area was significantly higher than that of conventional area. The results also indicated that the optimization of formula fertilization had obvious economic benefits, and each rubber tree reduced cost and increased 9.95 yuan on average after the test.
基金Supported by Natural Science Foundation of Hainan Province (40879)Educational Commission of Hunan Province of China (HJKJ2010-28)+1 种基金Scientific Research Foundation for Returned Scholars,Ministry of Education of ChinaCo-financing of Key Subjects"Cartography and Geographic Information System" and "Physical Geography"of Hainan Normal University~~
文摘[Objective] The paper was to carry out ecological geochemical survey and ecological risk assessment on the heavy metals in latosol in western area of Hainan Island.[Method] The contents of six heavy metals including Cr,Cu,Zn,As,Cd and Pb in latosol in western area of Hainan Island were analyzed.Single-factor index method and Hakanson ecological risk index method were used to evaluate the integrated pollution effect of heavy metals in latosol.[Result] The average contents of Cr,Cu,Zn,As,Cd and Pb in latosol in western area of Hainan Island were 65.57,35.16,93.56,8.50,0.24 and 79.29 mg/kg,respectively.The major pollution factor of heavy metal was Pb.The sequence of influence factors of various heavy metals was PbCu = ZnCrAsCd.The potential ecological risk coefficient of various heavy metals was PbCdCuAsCrZn.The average value of potential ecological risk index（RI）was 45.14,belonging to low ecological risk range.[Conclusion] The heavy metal pollution in latosol in western area of Hainan Island belongs to slight pollution.
