摘要
试验研究不同饲喂水平对妊娠中期藏绵羊生长性能、瘤胃发酵和血清生化指标的影响。随机将30只体重相近(50.83±3.12) kg、经同期发情处理并本交配种的妊娠中期藏绵羊分为3组,即自由采食(AL组)、70%采食组(70%AL组)和40%采食组(40%AL组),每组10只羊。结果显示,各组藏绵羊干物质采食量(DMI)和平均日增重(ADG)差异极显著(P<0.01)。AL组和70%AL组藏绵羊碱性磷酸酶(ALP)显著高于40%AL组(P<0.05),AL组藏绵羊谷草转氨酶(AST)显著高于其他两组(P<0.05),70%AL组尿素氮(BUN)含量极显著高于其他两组(P<0.01),AL组和70%AL组葡萄糖(GLU)极显著高于40%AL组(P<0.01)。AL组的瘤胃氨态氮浓度(NH3-N)显著高于40%AL组(P<0.05),AL组的乙酸和总酸含量极显著高于其他两组(P<0.01),丙酸显著高于其他两组(P<0.05),3组间丁酸含量差异极显著(P<0.01)。试验表明,低日粮饲喂水平(限饲)对妊娠中期藏绵羊的生长发育极为不利,应适时调控营养平衡以保证母羊及胎儿的健康生长。
The experiment studied the effect of different feeding levels on the growth performance,rumen fermentation and serum biochemical indicators of Tibetan sheep in the second trimester of pregnancy.30 Tibetan sheep with similar body weight(50.83±3.12)kg,treated in the same period of estrus,and bred in the second trimester of pregnancy,were randomly divided into three groups,namely ad libitum(AL group),70%the ad libitum intake group(70%AL group)and 40%the ad libitum intake group(40%AL group),each with ten sheep.The results showed that at mid-pregnancy,the difference between the three groups of Tibetan sheep DMI and ADG was extremely significant(P<0.01),respectively.At mid-pregnancy,the ALP of the AL group and the 70%AL group was significantly higher than that of the 40%AL group(P<0.05),the AST of the AL group was significantly higher than the other two groups(P<0.05),and the BUN content of the 70%AL group was significantly higher than the other two groups(P<0.01),and the GLU of the AL group and 70%AL group was extremely significantly higher than that of the 40%AL group(P<0.01).At mid-pregnancy,the rumen NH3-N of the AL group was significantly higher than that of the 40%AL group(P<0.05),the content of acetic acid and total acid in the AL group was extremely significantly higher than the others In the two groups(P<0.01),propionic acid was significantly higher than the other two groups(P<0.05),the difference in butyric acid content between the three groups was extremely significant(P<0.01).The experiment indicated that low dietary feeding levels(restricted feeding)are extremely detrimental to the growth and development of Tibetan sheep in the second trimester,and the nutritional balance should be adjusted in time to ensure the healthy growth of the ewe and fetus.
作者
张晓涵
刘书杰
冯宇哲
崔占鸿
杨其恩
ZHANG Xiao-han;LIU Shu-jie;FENG Yu-zhe;CUI Zhan-hong;YANG Qi-en
出处
《饲料研究》
CAS
北大核心
2021年第5期9-12,共4页
Feed Research
基金
国家重点研发计划子课题“牦牛和藏绵羊母畜能量与蛋白质营养需要的研究(项目编号:2016YFC05018050)”。
关键词
藏绵羊
妊娠中期
生长性能
血清生化指标
瘤胃发酵
Tibetan sheep
mid pregnancy
growth performance
serum biochemical indicators
rumen fermentation
