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《Acta Prataculturae Sinica》 2009-06
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Regulation of selenium and cobalt nutrition levels of grass and animal products by their transmission through the soil-pasture-feed-animal chain(SPFAC)

JIE Xiao-lei1,2,GUO Xiao1,2,LIU Shi-liang2,HU Hua-feng1,LI Jian-ping1,YAO Wen-chao3,LI Qiu-ling3(1.Zhengzhou College of Animal Husbandry Engineering,Zhengzhou 450011,China;2.Resources and Environment Institute of Henan Agricultural University,Zhengzhou 450002,China;3.Xinmi Agricultural Bureau,Zhengzhou 452370,China)  
A field experiment was arranged in the Yellow River beach from 2006 to 2008 to study the regulation of selenium(Se) and Se-cobalt(Co) by basal application of combined fertilizers(Na2SeO3·5H2O-570-765 g/hm2 and CoSO4·7H2O-762-1 548 g/hm2) on the nutrition of alfalfa and animal products through the "soil-pasture-feed-animal chain"(SPAFC).Alfalfa had a strong capacity to absorb Se from soil fertilizers and to convert inorganic Se to organic Se.Se and Co combined application increased the abilities to absorb and convert inorganic Se,thus effectiveness and security of Se could be greatly enhanced.When application rates of Se and Co were 765 and 762 g/hm2 respectively,Se-Co combined fertilizer enhanced the contents of crude protein(CP) and ether extract(EE),but had no apparent effect on the crude fiber(CF) content or non-nitrogen extract(NFE),suggesting that feed value was greatly increased.Other Se and Se-Co combined fertilizers increased CF contents,reduced EE contents but had no significant effects on other nutrients.Se and Se-Co combined fertilizers significantly(P0.05) enhanced the contents of Cu,Fe,Mn,and Zn.Se-Co combined fertilizers were better than Se alone fertilizers.When alfalfa meal(rich in Se and Co) was 5% of diet,Se contents of animal products were significantly enhanced.There were other significant correlations(P0.01) between Se contents in animal products,in pasture,and in soil.
【Fund】: 河南省杰出人才创新基金项目(0521001700)资助
【CateGory Index】: S812
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