蛋氨酸铬对肉鸡生长、脏器指数及血液生化指标的影响

试验旨在研究日粮中添加蛋氨酸铬对肉鸡生长、脏器指数及血清生化指标的影响,为确定日粮中蛋氨酸铬的适宜添加量提供科学依据。试验选用1日龄AA肉鸡528只,设4个处理,每个处理4个重复,每个重复33只。对照组饲喂玉米-豆粕型基础日粮,其它处理组饲喂分别在基础日粮中添加蛋氨酸铬0.1 mg/kg(Ⅰ组)、0.2 mg/kg(Ⅱ组)、0.6 mg/kg(Ⅲ组)的日粮(以Cr3+计),试验期49 d。结果表明:蛋氨酸铬能显著降低饲料消耗(P<0.05),但对肉鸡各日龄段平均体重、料重比和成活率影响差异均不显著(P>0.05)。除能显著降低心脏相对重量(P<0.05)外,日粮中添加蛋氨酸铬对肉鸡其它脏器相对重量影响差异均不显著(P>0.05)。日粮中添加蛋氨酸铬对血液生化指标影响显著(P<0.05)。因此,日粮中补充蛋氨酸铬对肉鸡生产性能、脏器指数影响不明显;但对血液生化指标影响显著,建议日粮中蛋氨酸铬添加量以0.2 mg/kg为宜。

Effects of methionine chromium on growth,viscera index and blood indexes of broilers

The experiment was conducted to evaluate the effects of dietary methionine chromium on growth,viscera index and blood biochemical indexes of arbor acres(AA) broilers.Five hundred and twenty-eight one-day-old arbor acres broilers were randomly allocated to four treatments(four replicates of thirty three broilers per replicate,respectively).The dietary treatments were: ① corn-soybean meal basal diet(B;according to NRC,1994),② B+0.1 mg/kg(as methionine chromium;Ⅰ),③ B+0.2 mg/kg(as methionine chromium;Ⅱ),④ B+0.6 mg/kg of Cr(as methionine chromium;Ⅲ).Broilers were given a free choice access to diets and tap water for 49 d.Average feed consumption was decreased(P<0.05) in broilers fed diets with methionine chromium compared with broilers fed with the control diet,average weight,feed conversion ratio and survival rate were not affected(P>0.05) by treatments.Heart relative weight was decreased(P<0.05) in broilers fed diets with methionine chromium compared with broilers fed with the control diet,other viscera relative weight were not affected(P>0.05) by diets.Blood biochemical indicator were increased(P<0.05) in broilers fed diets with methionine chromium compared with broilers fed with the control diet.These results suggest that dietary supplementation of methionine chromium in the AA broilers diet may significant increase blood biochemical indicator,however,methionine chromium had no significant effect on the growth,or viscera index.The recommended dosage of methionine chromium for broilers is 0.2 mg/kg.