日粮赖氨酸水平对1～21日龄肉鸡生长性能和血清生化指标的影响

发布时间：2018-11-15 15:11

【摘要】：试验旨在测定日粮赖氨酸水平对1~21日龄AA肉鸡生长性能、主要组织器官发育及血清生化指标的影响,并利用二次曲线模型估测其赖氨酸的需要量。将720只1日龄AA肉仔鸡雏随机分为6组,每组6个重复,每个重复20只。6个组分别饲喂赖氨酸水平为0.60%、0.80%、1.00%、1.20%、1.30%、1.40%的试验饲粮,试验期3周。结果:饲喂赖氨酸水平为1.00%和1.20%日粮的肉鸡平均日增重、日采食量及料重比显著优于其他组(P0.05);赖氨酸水平为1.00%的肉鸡胸肌率极显著大于低赖氨酸组(P0.01),但与高赖氨酸组无显著差异(P0.05),且1.00%组的胸腺、肝脏等器官重量极显著大于其他组(P0.01);赖氨酸水平对肉仔鸡血清中的白蛋白、尿素氮、总胆固醇具有显著影响(P0.05)。分别以日增重、料重比、胸肌率和胸腺指数为目标性状,通过二次模型估测得到1~21日龄AA肉鸡日粮赖氨酸的适宜水平分别为:1.160%、1.106%、1.181%、1.126%,平均为1.14%。
[Abstract]:The purpose of the experiment was to determine the effects of dietary lysine level on the growth performance, the development of main tissues and organs and the serum biochemical indexes of 1-21 day old AA broilers, and to estimate the lysine requirement by using the quadratic curve model. 720 1-day-old AA broiler chicks were randomly divided into 6 groups with 6 replicates in each group and 20 in each group. The six groups were fed lysine level of 0.600.800.80 and 1.200.30, respectively. 1.40% of the diet was tested for 3 weeks. Results: the average daily gain of broilers fed with 1.00% and 1.20% lysine level was significantly higher than that of other groups (P0.05). The breast muscle rate of broilers with 1.00% lysine level was significantly higher than that of low lysine group (P0.01), but not significantly different from that of high lysine group (P0.05), and the thymus of 1.00% group was significantly higher than that of low lysine group (P0.01). The weight of liver and other organs was significantly higher than that of other groups (P0.01). The levels of lysine had significant effects on serum albumin, urea nitrogen and total cholesterol (P0.05). Taking daily gain, feed weight ratio, pectoralis rate and thymus index as target traits, the optimum levels of lysine in diet of AA broilers at the age of 1 ~ 21 days were estimated by quadratic model: 1.160%, 1.106%, 1.181% and 1.126%, respectively. The average is 1.14.
【作者单位】：西北农林科技大学动物科技学院;
【基金】：陕西省农业科技创新与攻关项目(2016NY115)
【分类号】：S831.5

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