饲粮能量和蛋白质水平对61～120日龄湖羊羔羊生长性能、氮代谢和血清生化指标的影响

发布时间：2018-05-23 12:47

本文选题：羔羊 + 能量水平　；参考：《动物营养学报》2017年12期

【摘要】：本试验旨在研究饲粮能量和蛋白质水平对61~120日龄断奶湖羊羔羊生长性能、氮代谢及血清生化指标的影响。采用2×2两因素两水平试验设计,选取64只61日龄体重相近的纯种湖羊羔羊,随机分为4组,饲喂不同能量和蛋白质水平的饲粮,分别为高能量[代谢能(ME)为10.92 M J/kg]高蛋白质[粗蛋白质(CP)为15.74%]组、高能量(M E为10.92 M J/kg)低蛋白质(CP为11.78%)组、低能量(ME为8.64 MJ/kg)高蛋白质(CP为15.72%)组、低能量(ME为8.64 M J/kg)低蛋白质(CP为11.82%)组,每组4个重复,每个重复4只,公母各占1/2。试验期60 d。结果表明:1)饲粮能量与蛋白质水平对羔羊生长性能指标不存在交互作用(P0.05);饲粮高能量高蛋白质水平显著提高了羔羊61~90日龄的平均日增重(P0.05),显著降低了料重比(P0.05)。2)饲粮高蛋白质水平显著提高了81~90日龄、111~120日龄羔羊氮摄入量(P0.05);饲粮低能量高蛋白质水平显著提高了81~90日龄、111~120日龄羔羊尿氮排出量(P0.05),并且以低能量高蛋白质组尿氮排出量最高;对于81~90日龄羔羊,饲粮高能量高蛋白质水平显著提高了氮沉积(P0.05),而饲粮低能量或高蛋白质水平显著降低了氮生物学效价(P0.05)。3)羔羊120日龄时,饲粮低能量水平显著降低了血清葡萄糖含量(P0.05),显著提高了血清尿素氮含量(P0.05);饲粮低蛋白质水平显著提高了血清胰岛素样生长因子Ⅰ含量(P0.05)。综上所述,61~90日龄阶段,饲粮高能量高蛋白质水平可促进羔羊生长;91~120日龄阶段,可适当降低饲粮蛋白质水平以节约生产成本,不会对生长性能产生不利影响。
[Abstract]:The purpose of this study was to study the effects of dietary energy and protein levels on growth performance, nitrogen metabolism and serum biochemical indexes of 61- 120 day-old weaned Hu sheep. 64 purebred Hu sheep with similar body weight at 61 days old were randomly divided into 4 groups and fed diets with different energy and protein levels. They were high protein (10.92m J/kg), high protein (15.74%), high energy (10.92M / kg), low protein (11.78m), low energy ME (8.64MJ / kg), high protein (15.72g). Low energy ME = 8.64 MJ / kg, low protein CP = 11.82) group, with 4 repeats in each group, and 1 / 2 in male and female. The experimental period was 60 days. The results showed that there was no interaction between dietary energy and protein level on growth performance index of lamb (P0.05N), and high dietary energy and protein level significantly increased the average daily gain (ADG) of 61g / 90 day old lambs, and significantly decreased the feed / weight ratio (P0.05N 路2). Dietary high protein level significantly increased nitrogen intake (P0.05), dietary low energy and high protein level significantly increased urinary nitrogen excretion (P0.05N) of 111- 120 day old lambs at the age of 81 ~ 90 days, and the highest level of low energy and high protein group was found in the low energy and high protein group, and the nitrogen excretion was the highest in the low energy and high protein group. The nitrogen excretion of the lambs at the age of 81 ~ 90 days was significantly higher than that of the control group at the age of 111 ~ 120 days. For the 81- 90 day old lambs, the dietary high energy and high protein levels significantly increased the nitrogen deposition (P 0.05), while the dietary low energy or high protein levels significantly decreased the nitrogen biological titer (P 0.05 路3) of the lambs at 120 days of age. Dietary low energy level significantly decreased serum glucose content and increased serum urea nitrogen content, and dietary low protein level significantly increased serum insulin-like growth factor I content. To sum up, the high energy and high protein level of diet can promote the growth of lambs at the age of 91 ~ 120 days, which can reduce the dietary protein level to save the production cost and will not adversely affect the growth performance of lambs.
【作者单位】：中国农业科学院饲料研究所农业部饲料生物技术重点开放实验室;
【基金】：国家公益性行业(农业)科研专项(201303143) 国家肉羊产业技术体系建设专项(CARS-39)
【分类号】：S826.5

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