包被微量元素对肉仔鸡生长性能及相关理化指标影响

Effects of coating trace mineral elements premix on growth performance and related physicochemical indexes of broilers

为研究包被复合微量元素对肉仔鸡健康和生产性能影响,试验选用健康且体重相近的1日龄肉仔鸡600只,公母各半。随机分成3组,每组5个重复,每个重复40只鸡。对照组饲喂基础日粮,试验1、2组分别饲喂两种包被微量元素0.3 kg/t替代1 kg/t普通复合微量元素,试验期42 d。结果表明:与对照组相比,应用包被复合微量元素可以显著减少添加量(P<0.05),改善肉仔鸡生长性能,提高能量和脂肪利用率;包被微量元素可以显著提高肉鸡肝脏铜锌超氧化物歧化酶、谷胱甘肽过氧化物酶、过氧化氢酶活性,降低丙二醛含量(P<0.05),提高肉鸡抗氧化能力,同时可以显著降低粪便中铁、铜、锌含量(P<0.05),提高环境效益。综合考虑,应用包被形式微量元素,可以减少70%微量元素添加量。

In the experiment,the effects of coated complex trace mineral elements premix on health and product performance were studied.600 healthy one-day-old broilers were selected and randomly divided into 3 groups with 5 replicates per group and 40 broilers per replicate.The control group was fed a basal diet,and the experimental groups were fed two kinds of coated trace elements(0.3 kg/t)instead of 1 kg/t common complex trace elements,respectively.The experiment lasted for 42 d.The results showed that compared with the control group,the application of coated compound trace elements could significantly reduce the addition amount(P<0.05),improve the growth performance of broilers,and increase the utilization of energy and EE.Coating trace elements could significantly increase the activities of copper-zinc superoxide dismutase,glutathione peroxidase and catalase in the liver of broiler chickens,reduce the content of malondialdehyde(P<0.05),and improve the antioxidant capacity of broilers,and it could significantly reduce the iron,copper and zinc content in feces(P<0.05),and improve environmental benefits.To sum up,the application of coated trace elements could reduce the amount of trace elements added by 70%.