Effect of Selenium Source and Level in Hen”s Diet on Tissue Selenium Deposition and Egg Selenium Concentrations
The present study was conducted in a 2×4 factorial arrangement in a randomizedcomplete block(RCB) design to compare the effects of a commercial inorganic Se source(sodiumselenite,SS) with a commercial organic Se source(Se-enriched yeast,SY) on tissue Se distributionand blood and whole-egg Se concentrations in laying hens. Both Se sources were added into basaldiet at 0,0.2,0.5,1.0 mg/kg of Se. Seven hundred 68-week old Rohman laying hens were fed with abasal diet containing 0.15mg/kg DM(dry matter) of Se for 2 weeks,and then they were allocatedrandomly into seven groups and were investigated for 28 days. Each group was replicated 5 timeswith 5 cages of 4 hens per cage in each replicate. During the experiment,2 eggs per replicate fromeach treatment were collected every 7 days and blood was sampled on days 0,14 and 28 forwhole-egg and whole-blood Se analyses. At the end of the experiment,2 hens per replicate fromeach treatment were slaughtered,and muscle(cardiac and breast muscles),liver,spleen and kidneywere sampled for the determination of Se concentrations. The results showed that the addition of Sefrom either source caused a significant increase in whole-egg and whole-blood Se concentrations(p<0.01) and Se concentrations in liver,kidney,spleen and cardiac and breast muscles(p<0.05) ofhens in comparison to the control. Both Se source and Se level significantly influenced(p<0.01) Seconcentrations in egg,blood and the above-mentioned tissues. There was a more significant increasein the Se concentrations in egg(p<0.01),spleen(p<0.05) and breast muscle(p<0.01) and decrease(p<0.01) in whole-blood and kidney from hens fed SY than those from hens fed SS. The order of Sedistribution was liver>kidney>spleen>cardiac muscle>egg>blood>breast muscle,irrespective of theaddition level or source. It was concluded that meat and eggs from hens fed commercial SY are apotential source of Se for human.
无机硒源 有机硒源 硒水平 母鸡 蛋硒含量 组织硒沉积
Cuiling Pan Kehe Huang Yuxin Zhao Shunyi Qin Fu Chen
Institute of Nutritional and Metabolic Disorders in Domestic Animals and Fowls,Nanjing Agricultural University,Nanjing 210095,China
国内会议
广州
英文
749-763
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）