[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
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
本研究旨在探究土壤富硒条件下有机无机肥配施对不同类型甘薯产量、品质及硒吸收的影响,明确定量有机肥(6×10~3 kg hm^(–2))施用下无机化肥的最佳配比量,为甘薯富硒高效栽培提供理论依据。于2023—2024年,以鲜食型甘薯“心香”与...本研究旨在探究土壤富硒条件下有机无机肥配施对不同类型甘薯产量、品质及硒吸收的影响,明确定量有机肥(6×10~3 kg hm^(–2))施用下无机化肥的最佳配比量,为甘薯富硒高效栽培提供理论依据。于2023—2024年,以鲜食型甘薯“心香”与淀粉型“商薯19”为供试品种进行2年大田试验,在富硒土壤上(0.37 mg kg^(–1))设置有机无机肥配施改良活化土壤处理,包括100%化肥+有机肥、70%化肥+有机肥、50%化肥+有机肥、30%化肥+有机肥、单施化肥、单施有机肥与不施肥7个处理,分析收获期甘薯器官硒含量、块根产量与品质特性。结果表明,富硒土壤下,随着有机无机肥配施中无机化肥用量的减少,供试甘薯品种块根产量呈先上升后下降的趋势。在50%化肥配施处理下2种不同类型甘薯均可获得较高的块根产量,且块根硒含量及积累达到峰值。施用100%化肥配施有机肥可提高甘薯块根蛋白质含量与可溶性糖积累,但同时增加淀粉的糊化焓,不利于淀粉的糊化;而30%、50%化肥配施有机肥则有利于增加两品种的淀粉含量。此外,50%、70%化肥配施有机肥处理可提升不同类型甘薯淀粉峰值黏度与崩解值,且降低淀粉消减值,有利于改善甘薯口感。综合来看,50%化肥配施有机肥可协同提升不同类型甘薯块根产量与品质,且兼顾硒含量。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
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.
文摘本研究旨在探究土壤富硒条件下有机无机肥配施对不同类型甘薯产量、品质及硒吸收的影响,明确定量有机肥(6×10~3 kg hm^(–2))施用下无机化肥的最佳配比量,为甘薯富硒高效栽培提供理论依据。于2023—2024年,以鲜食型甘薯“心香”与淀粉型“商薯19”为供试品种进行2年大田试验,在富硒土壤上(0.37 mg kg^(–1))设置有机无机肥配施改良活化土壤处理,包括100%化肥+有机肥、70%化肥+有机肥、50%化肥+有机肥、30%化肥+有机肥、单施化肥、单施有机肥与不施肥7个处理,分析收获期甘薯器官硒含量、块根产量与品质特性。结果表明,富硒土壤下,随着有机无机肥配施中无机化肥用量的减少,供试甘薯品种块根产量呈先上升后下降的趋势。在50%化肥配施处理下2种不同类型甘薯均可获得较高的块根产量,且块根硒含量及积累达到峰值。施用100%化肥配施有机肥可提高甘薯块根蛋白质含量与可溶性糖积累,但同时增加淀粉的糊化焓,不利于淀粉的糊化;而30%、50%化肥配施有机肥则有利于增加两品种的淀粉含量。此外,50%、70%化肥配施有机肥处理可提升不同类型甘薯淀粉峰值黏度与崩解值,且降低淀粉消减值,有利于改善甘薯口感。综合来看,50%化肥配施有机肥可协同提升不同类型甘薯块根产量与品质,且兼顾硒含量。
