【摘要】 试验以玉米、大豆饼等饲料组成低硒(Se)基础日粮,将1026只1周令罗斯蛋用雏鸡分为9组每组分3个重复组。1组为对照组。饲喂基础日粮,Se 含量为0.045ppm;其余为试验组,日粮 Se含量分别为0.095、0.145、0.195 0.295、0.495、0.995、4.995和7.995ppm。试验期6用,研究不同日粮 Se 水平对雏鸡血液学指标及生长发育的影响。结果表明全血,血浆的 Se 含量及谷脘甘肽过氧化物酶(GSH—PX)活力均可反映雏鸡的日粮 Se 水平及 Se 缺乏或 Se 中毒,但各项指标反映的敏感性并不完全相同。Se 缺乏或过量使雏鸡发病率和死亡率显著增加 Cp<0.05,(增重明显减慢)p<0.05)。在本试验条件下,确定出罗斯蛋用雏鸡的 Se 需要量范围为0.145～0.495ppm,而以0.195ppm 最佳,日粮 Se 含量≤0.095或≤0.995ppm,雏鸡出现 Se 缺乏症或中毒症。更多还原

【Abstract】 The aim of this trail was to study the effects of different seleniem(Se) levels in diet on indexes of blood and growth of chicks.1026 one—week— old Ross egg—chicks were randowly into nine groups,Group one was con- trol group,and was fed low—Sebasal diet composed of maize soybean etc., whose Se-contenttwas 0.045ppm0.The others were treatment groups,wh- ose dietary Se-contents were 0.095,0.145,0.195,0.205,0.495,0.995, 4.995and 7.995ppm. Results showed that Se-levels and glutathione peroxidase(GSH-PX) aactivity in blood and plasma might reflect dietary selenium leveis and Se- deficiency or Se-toxicity in chicks.Selevels in blood and plasma,GSH-PX activity in plasma were more sensitive in reflecting Se-deficiency.They mig -ht be served as indexes for diagnosing Se-defictency disease of chicks du- ring earlypperiod.Se-level in blood was themostd sensitive in reflecting Se-toxicity.When Se was deficient or excess,mortality and morbidity of chicks were Significantly increased,(p<0.05),and bodyweight gain was obviously deoreased(p<0.05).Under condition of the trial,the Se-requi- rement of Ross eggchicks was at 0.145-0.495ppm,and the best result was obtajned from 0.195ppm group.When the djetary selenium level was below 0.095ppm or above 0995ppm,Se-deficiency or Se-toxicity disease appeared.更多还原