日粮中不同能量和蛋白水平对西农萨能羊泌乳量、乳成分及血浆生化指标的影响  

Effects of different energy and protein levels in the diets on the amount of lactation,milk composition and plasma biochemical indices of Xinong Saanen dairy goats

作　　者：许会芬[1] 罗军[1] 朱越[1] 朱江江[1] 李君[1] 杜鹃[1] 

机构地区：[1]西北农林科技大学动物科技学院,陕西杨凌712100

出　　处：《黑龙江畜牧兽医》2013年第1期1-4,共4页Heilongjiang Animal Science And veterinary Medicine

基　　金：公益性行业(农业)科研专项(201103038);陕西省重大科技创新项目(2009ZKC07-01);陕西省农业攻关项目(2010K01-032)

摘　　要：为了筛选出产奶羊合适的日粮能量和蛋白水平,研究采用2×2二因子完全随机区组试验将60只处于泌乳盛期的西农萨能羊[体重为(60.00±7.88)kg]随机分为4组,分别饲喂能量水平为12.36 MJ/kg(干物质)和12.92 MJ/kg(干物质)、蛋白水平为13.25%和15.80%的日粮,研究不同能量和蛋白水平对泌乳量、乳成分及血液生化指标的影响。结果表明:各处理间产奶量无显著差异(P>0.05);各组羊产奶量由产奶高峰期开始出现下降趋势,当能量水平为12.92 MJ/kg、蛋白水平为13.25%时泌乳量下降幅度最小,有利于保持产奶量。不同能量和蛋白水平对乳成分中的非脂固形物、乳糖、密度、冰点及酸度均无显著影响(P>0.05),但是能量水平为12.92 MJ/kg、蛋白水平为13.25%时乳中乳脂、乳蛋白及全脂固形物的含量均低于其他处理,尤其是乳脂的含量显著降低(P<0.05);能量水平为12.92 MJ/kg的2个试验组羊血浆中葡萄糖、三酰甘油及胆固醇含量均高于能量水平为12.36 MJ/kg的2个试验组(P<0.05),各蛋白水平之间无显著差异(P>0.05)。To select the appropriate energy and protein levels in the diets for lactating goat, the test was designed according to a completely ran-domized block design with two treatments in two block , sixty lactating goats [ （60. 00±7.88 ）kg body weight ] were randomly divided into four groups. Two energy levels （ 12.36 MJ/kg and 12.92 MJ/kg DM） and two protein levels （ 13.25% and 15.80% ） were used in the diets for the goats. The effects of different energy and protein levels in the diets on the amount of lactation, milk composition and plasma biochemical in-dices were studied. The results showed that there was no significant difference in the milk yield among each treatment （ P 〉 0.05 ）. The milk yield of the goats in each group began the downward trend from the milk production peak. The smallest decrease in the amount of lactation was found when the energy level in the diets was 12.92 MJ/kg with protein level of 13.25% , it was conducive to maintaining the milk yield. With different energy and protein levels in the diets, there were no remarkable differences in solids non - fat, lactose, density, freezing point depres- sion and acidity between each groups（ P 〉 0.05 ）. But with the energy level of 12.92 MJ/kg and protein level of 13.25% , the contents of but- terfat, milk protein and total solids of the group were lower than that of the other treatments, especially the content of the butterfat was signifi- cantly decreased （ P 〈 0.05 ）. The contents of glucose, triglyceride and choslesterol in the plasma from the two groups with high energy level of 12.92 MJ/kg were higher than those of the other two groups with low energy level 12.36 MJ/kg（ P 〈 0.05 ）. There was no significant difference between the two protein levels（ P 〉 0. 05 ）.

关 键 词：奶山羊 产奶量 乳成分 能量 蛋白水平 

分 类 号：S827.5[农业科学—畜牧学]