[Objectives]This study aimed to explore the effect of different concentrations of selenium fertilizer on the yield,selenium content and heavy metal contents of waxy maize,thereby providing reference for the scientific...[Objectives]This study aimed to explore the effect of different concentrations of selenium fertilizer on the yield,selenium content and heavy metal contents of waxy maize,thereby providing reference for the scientific application of selenium fertilizer on waxy maize.[Methods]Different varieties of waxy maize(Guitiannuo 611,Guinuo 615 and Guiheinuo 609)were used as test materials.They were sprayed with different concentrations(0,0.5,1.0,1.5 and 2.0 g/L)of water-soluble selenium fertilizer(Xinxibao)at the big flare stage,and the effect on the yield,selenium content and heavy metal contents of the waxy maize was analyzed.[Results]Foliar application of different concentrations of selenium fertilizer showed no significant effect on the yield and yield components of waxy maize.As the concentration of selenium fertilizer increased,the grain selenium content of different varieties of waxy maize increased.Among them,the increase of Guinuo 615 was the largest,of which the selenium content reached 0.265 mg/kg,2.82 times that of the control(water).The cadmium and arsenic contents of different varieties of waxy maize decreased with the increase of the concentration of selenium fertilizer sprayed.Among the waxy maize varieties,the cadmium and arsenic contents of Guitiannuo 611 dropped the most significantly,up to 52.94%and 77.78%.In waxy maize,the correlation coefficients between selenium content and cadmium,arsenic contents were-0.5509(P<0.05)and-0.8530(P<0.01),respectively.[Conclusions]Spraying exogenous selenium fertilizer had no obvious effect on the yield of waxy maize.However,the increase of the concentration of exogenous selenium fertilizer could significantly increase the selenium content and reduce the cadmium and arsenic contents in grains of different varieties of waxy maize.展开更多
For a long time, milk vetch has been an important green manure crop to provide fertilizer source for rice in rice planting areas, especially in nitrogen fixation and selenium enrichment. In order to better realize the...For a long time, milk vetch has been an important green manure crop to provide fertilizer source for rice in rice planting areas, especially in nitrogen fixation and selenium enrichment. In order to better realize the important value of milk vetch as a green manure crop, further optimize the planting strategy of green manure crops and improve the utilization efficiency. It is necessary to explore the specific effects of milk vetch on selenium content and yield of rice. This experiment is based on this theme. The final results show that the absorption capacity of selenium by milk vetch in paddy field is significantly stronger than that of rice. In order to ensure the selenium content of rice, trace selenium element (exogenous) can be applied to rice, and the yield of rice can also be effectively improved.展开更多
With the improvement of living standards, people pay more attention to the agricultural products with health protection function, and the selenium-rich agricultural products attract more and more consumers. The main b...With the improvement of living standards, people pay more attention to the agricultural products with health protection function, and the selenium-rich agricultural products attract more and more consumers. The main biological role of selenium is to resist oxidation and inflammatory response, mainly focusing on resisting aging, preventing cardiovascular disease, protecting eyesight, counteracting or destroying the toxic properties, preventing cancer and thyroid disease. In most areas of China, there is a widespread shortage of selenium, thus producing selenium-rich agricultural products to provide natural selenium-rich health food to the areas in need of selenium, has gradually become a new hot spot of China's health food industry, but high content of selenium in food is detrimental to human body, even leads to selenium intoxication, and artificially adding inorganic selenium is difficult to guarantee that the selenium content of agricultural products is not exceeded. According to human body's daily demand for selenium in dietetics and the content of selenium in agricultural products in the Chinese food composition table, we put forward the recommendations on the standard of selenium in agricultural products, in order to provide the basis for China to formulate the health standard of selenium content in selenium-rich agricultural products.展开更多
Some common staple roots and tubers (cassava, yam, sweet potato and yellow yam) were analyzed for selenium content level using hydride generation—atomic absorption spectrophotometry (HG-ASS) technique. Results for du...Some common staple roots and tubers (cassava, yam, sweet potato and yellow yam) were analyzed for selenium content level using hydride generation—atomic absorption spectrophotometry (HG-ASS) technique. Results for duplicate analysis revealed that sweet potato has the highest mean selenium content (19.2 ± 5.20 μg/kg), followed by yellow yam (18.3 ± 6.97 μg/kg), then yam (13.6 ± 7.12 μg/kg) and cassava the least (13.0 ± 5.84 μg/kg). In comparing our results with the literature values, most of the results obtained in this work such as <1.00, 1.09, 1.91, 2.35 and 11.0 μg/kg were lower while a few others like 52.6, 54.2, 72.3 and 81.8 μg/kg were higher than literature values. The variations could be due to the type of species/variety, geographical location, total selenium concentration in the soil and its bioavailability. In view of the importance of Se to human health and considering the levels found in the staples investigated, we recommend that sweet potato be popularized as a staple, much more than cassava as it is now the case in Central Nigeria.展开更多
Objective To compare selenium content in hair samples of people in Kaschin-Beck disease(KBD)areas and non KBD areas two months after stopping selenium salt in Shaanxi Province,to provide a scientific basis for KBD con...Objective To compare selenium content in hair samples of people in Kaschin-Beck disease(KBD)areas and non KBD areas two months after stopping selenium salt in Shaanxi Province,to provide a scientific basis for KBD control and prevention.Methods In September2012,four historical KBD areas were selected,including Yongshou,Yuyang,Linyou and Nanzheng,four展开更多
硒作为人体必需微量元素,在抗氧化、心血管保护、免疫增强及癌症预防等生理功能中具有关键作用。针对我国72%土壤缺硒的现状,通过作物施硒转化为有机硒是安全经济的补硒途径。本研究系统评估施硒对水稻、小麦、玉米的增产提质效应,为科...硒作为人体必需微量元素,在抗氧化、心血管保护、免疫增强及癌症预防等生理功能中具有关键作用。针对我国72%土壤缺硒的现状,通过作物施硒转化为有机硒是安全经济的补硒途径。本研究系统评估施硒对水稻、小麦、玉米的增产提质效应,为科学施硒提供理论依据。研究收集2013—2024年中国知网、维普、万方、Web of Science及PubMed数据库中134篇田间试验文献,以“硒”“小麦/玉米/水稻”“产量”为关键词,采用响应比自然对数(lnR)作为效应值进行Meta分析,借助Microsoft Office、Get Data Graph Digitizer、MetaWin 2.1等软件处理数据。施硒总体使水稻、小麦、玉米增产5.41%(95%CI:4.74%—6.08%,P_(Q)<0.01),其中小麦和水稻增产显著,分别提升8.72%(95%CI:7.69%—9.75%)和6.35%(95%CI:6.34%—7.71%),玉米增产不明显,效应值仅为0.46%(95%CI:-0.71%—1.63%)且lnR的95%置信区间下限小于0;施硒显著提升籽粒硒含量(164.09%,95%CI:156.15%—169.21%,P_(Q)<0.01),玉米提升效果最佳,效应值为172.97%(95%CI:164.55%—181.39%,P_(Q)<0.01);籽粒淀粉含量提质效应为2.39%(置信区间1.71%—3.06%,P_(Q)<0.05),仅玉米达到显著水平,效应值为3.87%(95%CI:2.86%—4.88%);籽粒蛋白质含量提质有正效应且效应值为4.99%(95%CI:3.78%—6.2%,P_(Q)>0.05),其中玉米最显著,效应值为8.90%(95%CI:4.45%—9.17%)。不同作物在施硒方式、地区和土壤硒含量等因素影响下表现各异。施硒对三种作物产量、硒含量、淀粉和蛋白质含量均有较大影响,是提升作物品质和产量的有效手段,但需依作物种类、地区和土壤条件优化施硒策略,保障人体硒营养摄入和农业优质高产。展开更多
Selenium is one of the essential trace elements in human body,however,due to the limitation of geographic factors,the intake of selenium is seriously insufficient in most regions.In this study,selenium-enriched peanut...Selenium is one of the essential trace elements in human body,however,due to the limitation of geographic factors,the intake of selenium is seriously insufficient in most regions.In this study,selenium-enriched peanut sprouts with high selenium content were prepared by soaking peanut seeds in sodium selenite.The content and distribution of selenium in germinated peanuts were investigated.The results showed that 200μmol/L sodium selenite and germination for 6 days resulted in the highest total selenium,organic selenium content,and organic selenium conversion in peanut sprouts.Selenium exists in peanut sprouts mainly in organic selenium form,of which selenoproteins are the most critical organic selenium carriers.ABTS free radical scavenging capacity and reducing power assays showed that alkali-soluble protein had the highest antioxidant activity among the four soluble proteins,attributed to its high selenium binding level.Radicle and cotyledons of peanut seedlings were significantly enriched with selenium compared to hypocotyl.Amino acid analysis and SDS-PAGE results showed that selenium increases significantly after peanut germination and selenium enrichment.This study provides a simple,environmentally friendly,and effective way of selenium enrichment and offers a theoretical basis for applying selenium-enriched foods in food and medicine.展开更多
Greenhouse experiment was conducted to investigate selenium accumulation and its antioxidant response in two rice varieties （PR116 and Pusa Basmati 1121） grown on normal and seleniferous soils. The plant growth was ...Greenhouse experiment was conducted to investigate selenium accumulation and its antioxidant response in two rice varieties （PR116 and Pusa Basmati 1121） grown on normal and seleniferous soils. The plant growth was reduced at early developmental stages and flowering was delayed by a period of 10 d on seleniferous soil. Selenium accumulation increased by 3-20 and 13-14 folds in leaves, 18 and 3 folds in grains from Pusa Basmati 1121 and PRl16 varieties, respectively. Selenium accumulation in leaves from rice plants grown on seleniferous soil resulted in significant increase in chlorophyll content, hydrogen peroxide, proline, free amino acids, total phenol and tannin contents. Lipid peroxidation levels and peroxidase activities in leaves increased whereas catalase activity showed a reverse trend. It is concluded that selenium accumulation decreased dry matter content in rice during crop development but these plants were able to combat selenium toxicity by inducing alterations in their defense system.展开更多
基金Key Research and Development Project of Guangxi(Gui Ke AB18221056)Guangxi Innovative Team Building Project in Earmarked Fund for China Agriculture Research System(nycytxgxcxtd-04-02)Special Fund for Innovation-driven Development in Guangxi(Gui Ke AA17204064)。
文摘[Objectives]This study aimed to explore the effect of different concentrations of selenium fertilizer on the yield,selenium content and heavy metal contents of waxy maize,thereby providing reference for the scientific application of selenium fertilizer on waxy maize.[Methods]Different varieties of waxy maize(Guitiannuo 611,Guinuo 615 and Guiheinuo 609)were used as test materials.They were sprayed with different concentrations(0,0.5,1.0,1.5 and 2.0 g/L)of water-soluble selenium fertilizer(Xinxibao)at the big flare stage,and the effect on the yield,selenium content and heavy metal contents of the waxy maize was analyzed.[Results]Foliar application of different concentrations of selenium fertilizer showed no significant effect on the yield and yield components of waxy maize.As the concentration of selenium fertilizer increased,the grain selenium content of different varieties of waxy maize increased.Among them,the increase of Guinuo 615 was the largest,of which the selenium content reached 0.265 mg/kg,2.82 times that of the control(water).The cadmium and arsenic contents of different varieties of waxy maize decreased with the increase of the concentration of selenium fertilizer sprayed.Among the waxy maize varieties,the cadmium and arsenic contents of Guitiannuo 611 dropped the most significantly,up to 52.94%and 77.78%.In waxy maize,the correlation coefficients between selenium content and cadmium,arsenic contents were-0.5509(P<0.05)and-0.8530(P<0.01),respectively.[Conclusions]Spraying exogenous selenium fertilizer had no obvious effect on the yield of waxy maize.However,the increase of the concentration of exogenous selenium fertilizer could significantly increase the selenium content and reduce the cadmium and arsenic contents in grains of different varieties of waxy maize.
文摘For a long time, milk vetch has been an important green manure crop to provide fertilizer source for rice in rice planting areas, especially in nitrogen fixation and selenium enrichment. In order to better realize the important value of milk vetch as a green manure crop, further optimize the planting strategy of green manure crops and improve the utilization efficiency. It is necessary to explore the specific effects of milk vetch on selenium content and yield of rice. This experiment is based on this theme. The final results show that the absorption capacity of selenium by milk vetch in paddy field is significantly stronger than that of rice. In order to ensure the selenium content of rice, trace selenium element (exogenous) can be applied to rice, and the yield of rice can also be effectively improved.
基金Supported by Hunan University Innovation Team FoundationHunan Science and Technology Plan Project (2011NK3093)
文摘With the improvement of living standards, people pay more attention to the agricultural products with health protection function, and the selenium-rich agricultural products attract more and more consumers. The main biological role of selenium is to resist oxidation and inflammatory response, mainly focusing on resisting aging, preventing cardiovascular disease, protecting eyesight, counteracting or destroying the toxic properties, preventing cancer and thyroid disease. In most areas of China, there is a widespread shortage of selenium, thus producing selenium-rich agricultural products to provide natural selenium-rich health food to the areas in need of selenium, has gradually become a new hot spot of China's health food industry, but high content of selenium in food is detrimental to human body, even leads to selenium intoxication, and artificially adding inorganic selenium is difficult to guarantee that the selenium content of agricultural products is not exceeded. According to human body's daily demand for selenium in dietetics and the content of selenium in agricultural products in the Chinese food composition table, we put forward the recommendations on the standard of selenium in agricultural products, in order to provide the basis for China to formulate the health standard of selenium content in selenium-rich agricultural products.
文摘Some common staple roots and tubers (cassava, yam, sweet potato and yellow yam) were analyzed for selenium content level using hydride generation—atomic absorption spectrophotometry (HG-ASS) technique. Results for duplicate analysis revealed that sweet potato has the highest mean selenium content (19.2 ± 5.20 μg/kg), followed by yellow yam (18.3 ± 6.97 μg/kg), then yam (13.6 ± 7.12 μg/kg) and cassava the least (13.0 ± 5.84 μg/kg). In comparing our results with the literature values, most of the results obtained in this work such as <1.00, 1.09, 1.91, 2.35 and 11.0 μg/kg were lower while a few others like 52.6, 54.2, 72.3 and 81.8 μg/kg were higher than literature values. The variations could be due to the type of species/variety, geographical location, total selenium concentration in the soil and its bioavailability. In view of the importance of Se to human health and considering the levels found in the staples investigated, we recommend that sweet potato be popularized as a staple, much more than cassava as it is now the case in Central Nigeria.
文摘Objective To compare selenium content in hair samples of people in Kaschin-Beck disease(KBD)areas and non KBD areas two months after stopping selenium salt in Shaanxi Province,to provide a scientific basis for KBD control and prevention.Methods In September2012,four historical KBD areas were selected,including Yongshou,Yuyang,Linyou and Nanzheng,four
文摘硒作为人体必需微量元素,在抗氧化、心血管保护、免疫增强及癌症预防等生理功能中具有关键作用。针对我国72%土壤缺硒的现状,通过作物施硒转化为有机硒是安全经济的补硒途径。本研究系统评估施硒对水稻、小麦、玉米的增产提质效应,为科学施硒提供理论依据。研究收集2013—2024年中国知网、维普、万方、Web of Science及PubMed数据库中134篇田间试验文献,以“硒”“小麦/玉米/水稻”“产量”为关键词,采用响应比自然对数(lnR)作为效应值进行Meta分析,借助Microsoft Office、Get Data Graph Digitizer、MetaWin 2.1等软件处理数据。施硒总体使水稻、小麦、玉米增产5.41%(95%CI:4.74%—6.08%,P_(Q)<0.01),其中小麦和水稻增产显著,分别提升8.72%(95%CI:7.69%—9.75%)和6.35%(95%CI:6.34%—7.71%),玉米增产不明显,效应值仅为0.46%(95%CI:-0.71%—1.63%)且lnR的95%置信区间下限小于0;施硒显著提升籽粒硒含量(164.09%,95%CI:156.15%—169.21%,P_(Q)<0.01),玉米提升效果最佳,效应值为172.97%(95%CI:164.55%—181.39%,P_(Q)<0.01);籽粒淀粉含量提质效应为2.39%(置信区间1.71%—3.06%,P_(Q)<0.05),仅玉米达到显著水平,效应值为3.87%(95%CI:2.86%—4.88%);籽粒蛋白质含量提质有正效应且效应值为4.99%(95%CI:3.78%—6.2%,P_(Q)>0.05),其中玉米最显著,效应值为8.90%(95%CI:4.45%—9.17%)。不同作物在施硒方式、地区和土壤硒含量等因素影响下表现各异。施硒对三种作物产量、硒含量、淀粉和蛋白质含量均有较大影响,是提升作物品质和产量的有效手段,但需依作物种类、地区和土壤条件优化施硒策略,保障人体硒营养摄入和农业优质高产。
基金supported by the National Natural Science Foundation of China[32172259]Key Research and Development Project of Henan Province[231111111800]+1 种基金Innovative Funds Plan of Henan University of Technology [2021ZKCJ03]The Program for the Top Young Talents of Henan Associate for Science and Technology.
文摘Selenium is one of the essential trace elements in human body,however,due to the limitation of geographic factors,the intake of selenium is seriously insufficient in most regions.In this study,selenium-enriched peanut sprouts with high selenium content were prepared by soaking peanut seeds in sodium selenite.The content and distribution of selenium in germinated peanuts were investigated.The results showed that 200μmol/L sodium selenite and germination for 6 days resulted in the highest total selenium,organic selenium content,and organic selenium conversion in peanut sprouts.Selenium exists in peanut sprouts mainly in organic selenium form,of which selenoproteins are the most critical organic selenium carriers.ABTS free radical scavenging capacity and reducing power assays showed that alkali-soluble protein had the highest antioxidant activity among the four soluble proteins,attributed to its high selenium binding level.Radicle and cotyledons of peanut seedlings were significantly enriched with selenium compared to hypocotyl.Amino acid analysis and SDS-PAGE results showed that selenium increases significantly after peanut germination and selenium enrichment.This study provides a simple,environmentally friendly,and effective way of selenium enrichment and offers a theoretical basis for applying selenium-enriched foods in food and medicine.
基金Council of Scientific and Industrial Research, New Delhi for financial support
文摘Greenhouse experiment was conducted to investigate selenium accumulation and its antioxidant response in two rice varieties （PR116 and Pusa Basmati 1121） grown on normal and seleniferous soils. The plant growth was reduced at early developmental stages and flowering was delayed by a period of 10 d on seleniferous soil. Selenium accumulation increased by 3-20 and 13-14 folds in leaves, 18 and 3 folds in grains from Pusa Basmati 1121 and PRl16 varieties, respectively. Selenium accumulation in leaves from rice plants grown on seleniferous soil resulted in significant increase in chlorophyll content, hydrogen peroxide, proline, free amino acids, total phenol and tannin contents. Lipid peroxidation levels and peroxidase activities in leaves increased whereas catalase activity showed a reverse trend. It is concluded that selenium accumulation decreased dry matter content in rice during crop development but these plants were able to combat selenium toxicity by inducing alterations in their defense system.
