期刊文献+
共找到1,231篇文章
< 1 2 62 >
每页显示 20 50 100
Impoverishment of Soil Nutrients in Gully Erosion Areas in Yuanmou Basin 被引量:10
1
作者 Zhang Jian-guo, Li Hui-xia, He Xiao-rong, Sheng Xin-ju, Fan Jian-rong, Zhu BoInstitute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China 《Wuhan University Journal of Natural Sciences》 CAS 2003年第03B期1034-1040,共7页
The impoverishment of soil nutrients of nine gully head areas in Yuanmou Basin is assessed through an integrated evaluation method established on the basis of Fuzzy mathematics and multivariate mathematical theory. Re... The impoverishment of soil nutrients of nine gully head areas in Yuanmou Basin is assessed through an integrated evaluation method established on the basis of Fuzzy mathematics and multivariate mathematical theory. Results show that soil erosion of gully erosion area in Yuanmou basin has resulted in severe impoverishment of soil nutrients. All gully head areas are at high leves of impoverishment except for one at middle. By probing into and analyzing the mechanism of impoverishment of soil nutrients, we find that soil erosion has led to impoverishment of soil nutrients in a way of compacting soil, heightening position of obstacle horizon, and reducing the content of organic matter, as well as the direct loss of nutrient elements. Finally, this paper points out that soil and water conservation arming at the prevention of soil erosion is the most effective way against impoverishment of soil nutrients in Yuanmou basin. 展开更多
关键词 dry red soil soil erosion soil nutrients impoverishment integrated evaluation
在线阅读 下载PDF
Poverty Alleviation by Helping the Disabled in Impoverished Mountainous Areas of Western China:Taking Luquan Yi and Miao Autonomous County in Yunnan Province as an Example
2
作者 Kai RAO Zisheng YANG 《Asian Agricultural Research》 2019年第9期51-55,共5页
Disabled people are the poorest in the rural poor with the biggest difficulty in getting rid of poverty and the highest rate of returning to poverty.They are one of the key groups in rural poverty alleviation work.Thi... Disabled people are the poorest in the rural poor with the biggest difficulty in getting rid of poverty and the highest rate of returning to poverty.They are one of the key groups in rural poverty alleviation work.This is the key and difficult point of winning the fight against poverty.Luquan County is a national poverty-stricken county with a large number of disabled people.Since the implementation of the fight against poverty in 2016,the county has introduced a series of policies and measures to help the disabled to get rid of poverty from housing,medical care,schooling for children of the disabled and income increase,and good results have been achieved in poverty alleviation,making important contributions to the poverty alleviation of the county.Based on field research and interviews,this paper analyzes and condenses the specific practices,main results and successful experience of the poverty alleviation model in Luquan County,Yunnan Province to provide necessary reference for the targeted poverty alleviation by helping the disabled in Yunnan Province and other provinces. 展开更多
关键词 impoverished mountainous area DISABLED people Poverty alleviation Luquan YI and MIAO AUTONOMOUS COUNTY
在线阅读 下载PDF
China's Impoverished Population Down to 30 Million
3
《China Population Today》 2001年第6期15-16,共2页
关键词 THAN China’s impoverished Population Down to 30 Million DOWN
在线阅读 下载PDF
The Content and Approaches of Human Resource Development in Impoverished Rural Regions in the Context of Targeted Poverty Alleviation
4
作者 Chen Boyong Tang Zhibin Guo Li 《Contemporary Social Sciences》 2018年第2期69-78,共10页
Poverty alleviation requires knowledge support. Targeted poverty alleviation, aiming to tackle rural poverty, needs to be supported by corresponding rural human resource development. Currently, China's human resou... Poverty alleviation requires knowledge support. Targeted poverty alleviation, aiming to tackle rural poverty, needs to be supported by corresponding rural human resource development. Currently, China's human resource development in impoverished rural regions is faced with some major problems; a huge population distributed over a vast area, a lack of technological and cultural attainment, obsolete concepts, obsolete technical resources, and a significant gap between rural and urban education attainment. Rural human resource development, which is geared to targeted poverty alleviation, includes a variety of impoverished rural population-oriented trainings, such as intelligence development, skills training, modern professionalism &work attitude cultivation, physical & mental health education, as well as modern lifestyle & civilized manners guidance. Targeted poverty alleviation should be equipped with mechanisms of comprehensive layout & planning, coordinated advancement of development content and implementation, and a mechanism of organization & input. The approaches to the advancement of rural human resource development are enhancing basic education, building a system of vocational education and training, raising the social security level and improving the supporting mechanisms. 展开更多
关键词 targeted poverty alleviation impoverished rural regions human resource development
在线阅读 下载PDF
Non-formal Education Bails Out Impoverished Ethnic Youth
5
作者 ZUO YUANFENG 《The Journal of Human Rights》 2008年第4期34-36,共3页
On a hot summer day in August 2006, Lamao Cering crouched in a windy field in west China's Qinghai Province murmuring to herself. "I want to go to school," she chanted quietly over and over in an almost mantra-like... On a hot summer day in August 2006, Lamao Cering crouched in a windy field in west China's Qinghai Province murmuring to herself. "I want to go to school," she chanted quietly over and over in an almost mantra-like trance, oblivious to her father's call to come back and tend the sheep. 展开更多
关键词 UNICEF Non-formal Education Bails Out impoverished Ethnic Youth
原文传递
Village Inspiration A CPPCC National Committee member turns the fortunes of an impoverished village around with determination and innovation
6
作者 Li Xiaoyu 《ChinAfrica》 2018年第4期25-25,共1页
On entering the mountainous vii lage of Yanbo in southwest China's Guizhou Province. the first thing noticeable is the flat roads and rows of new houses with cars parked in front of them. Against the hillside behind ... On entering the mountainous vii lage of Yanbo in southwest China's Guizhou Province. the first thing noticeable is the flat roads and rows of new houses with cars parked in front of them. Against the hillside behind ihe houses are several bustling village run enterprises, including a distillery and poultry farms. 展开更多
关键词 In Village Inspiration A CPPCC National Committee member turns the fortunes of an impoverished village around with determination and innovation CPC
原文传递
How to improve the COVID-19 health education strategy in impoverished regions:a pilot study 被引量:3
7
作者 Huimin Wang Rujun Liao +4 位作者 Xin Chen Jie Yu Tianyu Zhu Qiang Liao Tao Zhang 《Infectious Diseases of Poverty》 SCIE 2022年第2期90-91,共2页
Background:It is of great challenge to raise the public coronavirus disease 2019(COVID-19)related health literacy(CRHL)in impoverished regions due to the limits of poor infrastructure,large proportion of vulnerable gr... Background:It is of great challenge to raise the public coronavirus disease 2019(COVID-19)related health literacy(CRHL)in impoverished regions due to the limits of poor infrastructure,large proportion of vulnerable groups,etc.However,those limits cannot be solved in the short term.Therefore,this study chose Liangshan Yi Autonomous Prefecture,one of the poorest areas in China,as a pilot,to reveal the quantitative relationships among diferent dimensions under the COVID-19 health education framework,clarify the key points for health promotion,and provide specifc suggestions for COVID-19 health education strategy in impoverished regions.Methods:A cross-sectional questionnaire survey was conducted in fve regions of Liangshan Yi Autonomous Prefecture in 2020.There were 2,100 individuals sampled by multi-stage method.This survey mainly measured the four dimensions:CRHL,COVID-19 related tense psychological reactions(CRTPR),COVID-19 related information report acquisition(CRIRA),and general health literacy(GHL).The multivariate logistic regression was used to explore the infuence of demographic characteristics on each dimension.Furthermore,to quantify the relationships among different dimensions,this study employed the structural equation model(SEM),and analyzed the mediating efects of CRHL and CRIRA as well as the moderating efects of regional characteristic variables.Results:The CRHL played an important role in promoting COVID-19 health education,reaching 52.5%in Liangshan Yi Autonomous Prefecture.The GHL(β=0.336)and age(β=0.136)had statistically positive impacts on CRHL.The CRHL afected CRTPR negatively(β=−0.198)and CRIRA positively(β=0.052).The CRHL played signifcant mediating roles among the four dimensions(P<0.05).Efectiveness of government prevention and control as well as the ethnicity moderated not only the relationships between CRHL and other dimensions,but also the mediating efect of CRHL(P<0.05).People with lower income and education levels had lower GHL(β=0.286,1.292).The youth were more likely to show CRTPR(β=−0.080).Conclusions:By proposing and verifying the theoretical framework,this study put forward specifc suggestions on how to improve COVID-19 health education strategies in impoverished regions via implementation methods,key groups and efect evaluation,which also provided references about future public health emergencies for other impoverished regions of the world. 展开更多
关键词 COVID-19 Health education strategy impoverished region Health literacy Structural equation model Mediating efect Moderating efect
原文传递
领悟社会支持对贫困大学生主观幸福感的影响:自尊与心理韧性的链式中介作用
8
作者 程子良 廖传景 +2 位作者 胡嘉欢 徐敏 翁添富 《黑龙江科学》 2026年第1期63-67,共5页
为探究领悟社会支持对贫困大学生主观幸福感的内在作用机制,采用问卷调研法对1589名贫困大学生进行调查。结果显示,贫困大学生领悟社会支持、自尊、心理韧性和主观幸福感两两之间呈显著正相关关系,领悟社会支持、自尊和心理韧性是影响... 为探究领悟社会支持对贫困大学生主观幸福感的内在作用机制,采用问卷调研法对1589名贫困大学生进行调查。结果显示,贫困大学生领悟社会支持、自尊、心理韧性和主观幸福感两两之间呈显著正相关关系,领悟社会支持、自尊和心理韧性是影响贫困大学生主观幸福感的重要因素。贫困大学生的自尊与心理韧性在领悟社会支持和主观幸福感之间起链式中介作用。 展开更多
关键词 领悟社会支持 主观幸福感 自尊 心理韧性 贫困大学生
在线阅读 下载PDF
相对贫困地区的生成逻辑、治理难点与共富策略
9
作者 高强 张海为 曾恒源 《新疆师范大学学报(哲学社会科学版)》 北大核心 2026年第1期52-61,共10页
加快相对贫困地区发展是推进乡村全面振兴的内在要求,也是实现农村农民共同富裕的必然路径。文本遵循“生成逻辑—治理难点—应对策略”的逻辑主线,对相对贫困的形成机制、现实挑战和实现共同富裕的策略进行探究。研究表明:相对贫困的... 加快相对贫困地区发展是推进乡村全面振兴的内在要求,也是实现农村农民共同富裕的必然路径。文本遵循“生成逻辑—治理难点—应对策略”的逻辑主线,对相对贫困的形成机制、现实挑战和实现共同富裕的策略进行探究。研究表明:相对贫困的形成不仅与制度设计和政策安排紧密相关,而且与地理区位及资源禀赋密切相连,并在多维因素共同作用下形成低水平均衡的路径依赖。从实践层面看,开展相对贫困治理面临帮扶对象识别监测之难、长效治理路径转型之困以及内生发展动力激发之阻三大挑战。文本认为,在全面推进乡村振兴背景下,相对贫困地区与欠发达地区具有较高的重合度,因此,相对贫困地区治理与欠发达地区常态化帮扶具有同等的社会价值和政策取向。新时代新征程,要聚焦共同富裕目标,加快健全相对贫困治理体系,通过理念重构、机制优化、路径创新和制度变革,系统破解发展瓶颈、补齐发展短板,使相对贫困地区跟上国家现代化步伐。 展开更多
关键词 相对贫困地区 相对贫困人口 共同富裕 乡村振兴
原文传递
Coronavirus disease 2019 epidemic in impoverished area: Liangshan Yi autonomous prefecture as an example
10
作者 Ru-Jun Liao Chun-Nong Ji-Ke +4 位作者 Tao Zhang Qiang Liao Ling Li Tian-Yu Zhu Shao-Yong Bian 《Infectious Diseases of Poverty》 SCIE 2020年第4期168-168,共1页
Background The outbreak of coronavirus disease 2019(COVID-19)had spread worldwide.Although the world has intensively focused on the epidemic center during this period of time,it is imperative to emphasize that more at... Background The outbreak of coronavirus disease 2019(COVID-19)had spread worldwide.Although the world has intensively focused on the epidemic center during this period of time,it is imperative to emphasize that more attention should also be paid to some impoverished areas in China since they are more vulnerable to disease outbreak due to their weak health service capacities.Therefore,this study took Liangshan Yi Autonomous Prefecture as an example to analyze the COVID-19 epidemic in the impoverished area,evaluate the control effect and explore future control strategies.Methods In this study,we collected information including age,gender,nationality,occupation,and address of all COVID-19 cases reported from 25 January 2020 to 23 April 2020 in Liangshan Prefecture from the Nationwide Notifiable Infectious Diseases Reporting Information System(NIDRIS),which were used under license and not publicly available.Additionally,we retrieved other information of cases through epidemiological investigation reports reviewing.Data were analyzed using the software Excel 2010 and SPSS 17.0.The geographic distribution of cases was mapped using ArcGIS10.2.Results By 23 April 2020,a total of 13 COVID-19 cases and two asymptomatic SARS-CoV-2 carriers were reported in Liangshan,in three family clusters.Among the cases,eight cases had a history of sojourning in Hubei Province(61.54%),of which six were related to Wuhan.Cases aged under 44 years accounted for 61.54%,with no child case.The delay of patients’hospital visiting,and the low degree of cooperation in epidemiological investigation are problems.Conclusions During the study period,Liangshan was well under control.This was mainly contributed to strict preventive strategies aimed at local culture,inter-sectoral coordination and highly degree of public cooperation.Besides,some possible environmentally and culturally preventive factors(e.g.,rapid air flow and family concept)would affect disease prevention and control.In the next step,the health education about COVID-19 should be strengthened and carried out according to the special culture of ethnic minorities to enhance public awareness of timely medical treatment. 展开更多
关键词 SARS-CoV-2 Coronavirus disease 2019 impoverished area EPIDEMIOLOGY
原文传递
Problems and thoughts on the present system of assisting impoverished students in Chinese higher education institutes
11
作者 LIANG Jinxia XU Lili 《Frontiers of Education in China》 2007年第4期620-633,共14页
By sending out questionnaires to 106 counselors of 98 colleges and universities,panel discussion and interviewing,the authors implement a fairly comprehensive survey on the development of the financial aid system of a... By sending out questionnaires to 106 counselors of 98 colleges and universities,panel discussion and interviewing,the authors implement a fairly comprehensive survey on the development of the financial aid system of assisting impoverished students in higher education institutes(HEIs)in China,including national student loans,award fund supported by government,on campus workstudy and subsidy,etc.This paper aims at probing into some major problems that exist in this system and offer some suggestions and countermeasures on how to improve and develop the system. 展开更多
关键词 national student loans financial aid system impoverished students
原文传递
大关县贫困村搬迁后闲置建筑空间再利用研究
12
作者 王宥迪 《建筑与文化》 2026年第1期197-199,共3页
针对易地扶贫搬迁致使大关县高寒山地村落建筑出现闲置的问题,本研究通过开展建筑测绘工作并与村民进行深入访谈,提出了“红绿融合”的再生策略,创新性地融入“旅居型乡村”理念,构建了“民宿集群+文化展演+生态研学”的三体联动模式,... 针对易地扶贫搬迁致使大关县高寒山地村落建筑出现闲置的问题,本研究通过开展建筑测绘工作并与村民进行深入访谈,提出了“红绿融合”的再生策略,创新性地融入“旅居型乡村”理念,构建了“民宿集群+文化展演+生态研学”的三体联动模式,并依托玉碗村旧民居改造对该模式在经济增收与文化存续方面的协同效益进行了验证。研究成果为西南山地乡村达成“空间—产业—文化”协同振兴提供了范式参考。 展开更多
关键词 大关县 贫困村搬迁 闲置建筑 空间再利用
在线阅读 下载PDF
基于LSTM神经网络的高校精准资助模型研究 被引量:1
13
作者 柯琳 周俊 夏斌 《佳木斯大学学报(自然科学版)》 2025年第3期148-150,180,共4页
高校学生资助体系是国家教育扶贫的重要组成部分,现阶段对高校贫困生资助过程中存在人为因素干扰、缺少量化手段等问题,影响了教育资助的公平和效益。在对教育精准资助研究现状详细分析基础上,指出人工智能在解决教育资助问题上的新路... 高校学生资助体系是国家教育扶贫的重要组成部分,现阶段对高校贫困生资助过程中存在人为因素干扰、缺少量化手段等问题,影响了教育资助的公平和效益。在对教育精准资助研究现状详细分析基础上,指出人工智能在解决教育资助问题上的新路径。结合LSTM神经网络模型在处理和预测时序数据中的优势,设计和开发了基于LSTM的高校贫困生精准资助模型,研究模型隐层单元数与贫困生资助等级识别率之间的关系以优化模型。实验结果表明当隐层神经元数为120时,对受国家助学金资助的贫困大学生分类识别率最高且达到98.11%。该模型的建立为高校大学生助学资助工作提供了智能量化手段,对于教育扶贫公平和提高贫困大学生资助效益具有重要意义。 展开更多
关键词 高校贫困生 精准资助 长短时记忆神经网络 人工智能
在线阅读 下载PDF
PKE-PF及其在滚动轴承故障预测中的应用
14
作者 沈建 陈小忠 +1 位作者 徐波 罗鹏 《机械设计与制造》 北大核心 2025年第12期41-46,共6页
针对数据不完备情形下轴承故障预测中常见的粒子枯竭问题,提出了一种先验知识强化粒子滤波(Priori Knowledge Enhanced Particle Filter,简称PKE-PF)方法。基于已有轴承全寿命退化数据以及迁移学习理论中的参数迁移方法,开展粒子滤波(Pa... 针对数据不完备情形下轴承故障预测中常见的粒子枯竭问题,提出了一种先验知识强化粒子滤波(Priori Knowledge Enhanced Particle Filter,简称PKE-PF)方法。基于已有轴承全寿命退化数据以及迁移学习理论中的参数迁移方法,开展粒子滤波(Particle Filter,简称PF)方法中极为重要的粒子初始化优化工作,提升粒子有效性,避免粒子过早枯竭问题。基于滚动轴承全寿命退化实验开展方法验证,验证结果表明,相较于传统的PF方法及其改进方法,PKE-PF方法能够有效避免粒子过早枯竭,获得了更为理想的故障预测结果,为工程实际提供了一种有益的故障预测参考方法。 展开更多
关键词 故障预测 粒子滤波 粒子枯竭 迁移学习 先验知识强化 轴承
在线阅读 下载PDF
数智时代艺术民族志重建完整经验的方法论——基于本雅明经验理论的当代转化
15
作者 孟凡行 张艳 《民族艺术研究》 2025年第6期50-60,共11页
数智时代,“信息茧房”与消费主义加剧了经验碎片化与虚假性,个体与传统、他者的疏离进一步深化,经验贫乏危机日益严峻。本雅明的经验理论虽深刻揭示了现代性条件下经验断裂的根源,但其论述零散,缺乏系统的方法论支撑,难以直接转化为应... 数智时代,“信息茧房”与消费主义加剧了经验碎片化与虚假性,个体与传统、他者的疏离进一步深化,经验贫乏危机日益严峻。本雅明的经验理论虽深刻揭示了现代性条件下经验断裂的根源,但其论述零散,缺乏系统的方法论支撑,难以直接转化为应对当代危机的实践方案。艺术民族志作为一种整合艺术形式描述与社会文化叙事的跨学科研究方法,可继承并发展本雅明的思想资源,通过艺术形式革新和叙事实践转化,构建出层次分明的三维书写范式:身体性书写重建经验的整体性与连续性,再现性书写驯化技术的工具理性,阐释—建构性书写推动个体经验向集体知识升华。这一方法论并非回归前现代经验形态,而是激活现代条件自身的潜能,为数智时代重建具有主体性、能动性与传承性的完整经验提供可行方案。 展开更多
关键词 数智时代 艺术民族志 本雅明 经验贫乏 完整经验
在线阅读 下载PDF
高校家庭经济困难学生资助获得感现实困境与提升路径研究
16
作者 吴素红 陈庆宾 《湖北开放职业学院学报》 2025年第1期52-54,共3页
高校家庭经济困难学生是高校资助育人工作对象,其获得感水平是高校资助育人实效的直接体现。调查发现,当前高校家庭经济困难生资助获得感还存在物质获得与精神获得不平衡、能力获得与发展获得不全面、安全获得与认同获得不完善、主体获... 高校家庭经济困难学生是高校资助育人工作对象,其获得感水平是高校资助育人实效的直接体现。调查发现,当前高校家庭经济困难生资助获得感还存在物质获得与精神获得不平衡、能力获得与发展获得不全面、安全获得与认同获得不完善、主体获得与价值获得不充分等问题,影响获得感水平和育人实效。为落实立德树人根本任务,提升家庭经济困难学生资助获得感,应从四个方面着手:完善体系,推动资助全面性;把握需求,提升资助精准性;多方联动,强化资助实践性;聚焦提升,创新资助发展性。 展开更多
关键词 家庭经济困难学生 获得感 现实困境 提升路径
在线阅读 下载PDF
中国连片开发扶贫政策效果评估与前景展望
17
作者 卢盛峰 杨光照 《财经理论研究》 2025年第1期12-37,共26页
通过构建包括2000-2020年村/社区面板、企业面板和县级面板在内的丰富数据集,使用断点回归设计系统评估了中国连片开发扶贫政策的经济效果。研究结果表明:中国连片特困地区扶贫开发短期内大幅度提升了农村可支配收入,同时对异质性企业... 通过构建包括2000-2020年村/社区面板、企业面板和县级面板在内的丰富数据集,使用断点回归设计系统评估了中国连片开发扶贫政策的经济效果。研究结果表明:中国连片特困地区扶贫开发短期内大幅度提升了农村可支配收入,同时对异质性企业产生了复杂影响,尤其提高了劳动密集型产业的全要素生产率和产出;促进了中长期经济增长,具体表现为提高了宏观工业产出、实现了区域内部门间劳动力转移、总体上提高了资本存量和生产率,同时重塑了基础设施和公共服务布局;在后续一系列稳健性检验中,上述结论依然显著成立。在此基础上,提出了巩固拓展脱贫攻坚成果、引导土地经营权有序流转、优化农村公共服务空间布局和推动乡村产业发展等建议,并对未来中国巩固拓展脱贫攻坚成果的政策制定进行了前景展望。 展开更多
关键词 连片特困地区 扶贫开发 工业化 全要素生产率
在线阅读 下载PDF
贫困大学生个人目标对主观幸福感的影响:家庭支持和感恩的链式中介作用
18
作者 朱丽莉 《温州职业技术学院学报》 2025年第1期62-66,82,共6页
脱贫攻坚战虽已取得全面胜利,但需要关注心理上的脱贫,注重提升贫困生幸福感指数。采用个人目标问卷、家庭支持问卷、感恩量表及主观幸福感量表对浙江省1 346名高校贫困生进行调查,考察个人目标、家庭支持、感恩和主观幸福感四者之间的... 脱贫攻坚战虽已取得全面胜利,但需要关注心理上的脱贫,注重提升贫困生幸福感指数。采用个人目标问卷、家庭支持问卷、感恩量表及主观幸福感量表对浙江省1 346名高校贫困生进行调查,考察个人目标、家庭支持、感恩和主观幸福感四者之间的关系,构建链式中介模型。结果表明,贫困生个人目标、家庭支持、感恩和主观幸福感水平处于中等水平。个人目标能直接预测主观幸福感,还可以通过家庭支持和感恩的链式中介间接影响贫困大学生主观幸福感。 展开更多
关键词 个人目标 家庭支持 感恩 主观幸福感 贫困大学生
在线阅读 下载PDF
高校贫困生精准育人模式的实践与优化——以普洱学院为例 被引量:1
19
作者 杜益瑞 蒋晓娟 叶根 《科教导刊》 2025年第12期139-141,共3页
文章探讨了普洱学院贫困生精准育人模式的现状与优化路径。首先,分析了当前该模式存在的问题;其次,提出重点从完善贫困生识别机制、实施个性化帮扶、推动多方合作等方面进行改进,旨在提升贫困生教育的精准性与有效性;最后,对贫困生精准... 文章探讨了普洱学院贫困生精准育人模式的现状与优化路径。首先,分析了当前该模式存在的问题;其次,提出重点从完善贫困生识别机制、实施个性化帮扶、推动多方合作等方面进行改进,旨在提升贫困生教育的精准性与有效性;最后,对贫困生精准育人模式的未来发展进行了展望,强调持续创新、深化校企合作以及提高学生综合素养的重要性。 展开更多
关键词 贫困生 精准育人 教育模式 优化策略
在线阅读 下载PDF
培肥措施对贫瘠红壤稻田肥力的影响及其评价
20
作者 阿合古丽·努尔布拉提 曾希柏 +4 位作者 文炯 张洋 徐冰倩 张苗 王亚男 《农业环境科学学报》 北大核心 2025年第12期3200-3210,共11页
以湖南岳阳第四纪红壤发育的贫瘠稻田为对象,探究不同培肥处理对土壤肥力的影响,并应用综合肥力指数(BIF)评价不同处理培肥土壤的效果。基于田间试验,设置不施肥、施有机肥、冬种紫云英、秸秆还田等处理,分析不同处理土壤理化性质、酶... 以湖南岳阳第四纪红壤发育的贫瘠稻田为对象,探究不同培肥处理对土壤肥力的影响,并应用综合肥力指数(BIF)评价不同处理培肥土壤的效果。基于田间试验,设置不施肥、施有机肥、冬种紫云英、秸秆还田等处理,分析不同处理土壤理化性质、酶活性、微生物丰度和微生物量碳氮等的变化,采用主成分分析法建立最小数据集(MDS),应用隶属度函数模型和BIF计算评价不同处理下土壤的综合肥力。结果显示:不同培肥措施均一定程度提高了土壤的综合肥力,与单施化肥(NPK)处理相比,施用氮磷钾化肥并用猪粪替代40%氮素(NPKM1)处理下土壤碱解氮(AN)、有效磷(AP)和微生物量碳含量均显著提高,其提升幅度分别为92.1%、17.1%和75.3%,且土壤脲酶(Urease)、α-1,4-葡糖苷酶和亮氨酸氨肽酶的活性亦有一定幅度增强,但该处理显著降低了β-1,4-葡糖苷酶(βG)和β-1,4-N-乙酰基氨基葡萄糖酐酶的活性。施用氮磷钾化肥并用发酵菜籽饼肥替代40%氮肥且秸秆发酵还田处理下,细菌、真菌和古菌的数量丰度相对较高。根据相关结果,构建了由土壤可溶性有机碳、AN、铵态氮、AP、容重、βG、酸性磷酸酶、Urease和细菌数量丰度等9个指标组成的MDS,以评价不同处理下土壤综合肥力的提升效果,发现NPKM1处理效果最好,指标值为0.743;施用氮磷钾化肥并早稻秸秆粉碎还田且种植紫云英还田处理下产量最高,为4 707.52 kg·hm-2。对洞庭湖区贫瘠红壤稻田而言,在施用氮磷钾化肥的基础上,施用替代40%氮的猪粪能够达到肥力和产量协同提升的目的,紫云英与秸秆还田联合施用可以达到最好的增产效果。 展开更多
关键词 有机肥 贫瘠红壤稻田 土壤肥力 培肥
在线阅读 下载PDF
上一页 1 2 62 下一页 到第
使用帮助 返回顶部