外源性金属硫蛋白对奶牛泌乳性能的影响  

Effects of Metallothionein on Milkability of Dairy Cattle

作　　者：杨沐[1] 李丽立[2] 张彬[1] 张佩华[1] 吴力专[1] 毕小艳[1] 

机构地区：[1]湖南农业大学动物科学技术学院,长沙410128 [2]中国科学院亚热带农业生态研究所,长沙410125

出　　处：《中国奶牛》2011年第10期9-12,共4页China Dairy Cattle

基　　金：国家自然科学基金项目(3107205330671516);湖南省博士生科技创新基金项目(CX2010B284)

摘　　要：选取24头经产泌乳中国荷斯坦牛,随机等分为Ⅰ、Ⅱ、Ⅲ、Ⅳ 4组,分别每头静脉注射经生理盐水溶解的Zn-MT 0(对照)、5.0、10.0和15.0mg,以探讨外源性金属硫蛋白(MT)对奶牛泌乳性能的影响。结果表明,Ⅱ组、Ⅲ组和IV组的4%标准乳产量均显著(P<0.05)高于对照组;各试验组奶中MT含量显著(P<0.05或P<0.01)高于对照组;各组间的乳脂率虽无显著差异(P>0.05),但也呈现出试验组高于对照组的趋势。说明MT是一种能够有效调控奶牛泌乳性能的生理活性物质和高效抗氧化剂。To approach the effects of exogenous metallothionein（MT） on milkability of dairy cattle,24 lactating cows from Chinese Holstein were randomly allocated to Group I,GroupII,Group III and Group IV,and supplemented MT 0mg.capita-1,5.0mg.capita-1,10.0mg.capita-1 and 15.0mg.capita-1 by intravenous injection respectively.The results showed that milk yields of the cows in GroupII,Group III and Group IV were significantly higher（P0.05） than those in Group I,while there were no significant differences（P0.05）in milkfat percentages among different groups.MT contents in milk of the cows in Group II,Group III and Group IV were also higher（P0.05 of P0.01） than those in Group I.The experimental results suggested that exogenous MT should be an effective anti-oxidative substance and physiologic accommodation composition for dairy cattle.

关 键 词：金属硫蛋白 抗氧化 泌乳量 乳脂率 奶牛 

分 类 号：S823[农业科学—畜牧学]