外源性金属硫蛋白对中国荷斯坦奶牛产能性能和内分泌的影响  

Effects of exogenous metallothionein on energy production and incretion of China Holstein cows

作　　者：吴力专[1,2] 陈海燕[1] 张彬[1] 李丽立[3] 陈宇光[1] 肖定福[1] 罗佳捷[1] 吴宗明[1] 

机构地区：[1]湖南农业大学动物科学技术学院,湖南长沙410128 [2]长江大学动物科学学院,湖北荆州434025 [3]中国科学院亚热带农业生态研究所,湖南长沙410125

出　　处：《草业学报》2011年第1期183-188,共6页Acta Prataculturae Sinica

基　　金：国家自然科学基金项目(310720533067151630571351);湖南省研究生科研创新项目(CX2010B284)资助

摘　　要：选取24头泌乳奶牛,随机分成A、B、C和D,4组,分别按剂量0.0(对照),6.0,12.0和16.0mg/头静脉注射金属硫蛋白(MT),以探讨外源性MT对奶牛产能性能和内分泌的影响。结果表明,B组1～30d、C组1～45d的标准产奶量显著高于A组,C组乳脂率在31～45d较A组有显著改善;B组INS含量30d显著高于A组;C组IGF-Ⅰ和T3含量45d最高,显著高于A组,而D组受到抑制;C组FSH和E2含量变化幅度最小;B组P含量30d时显著高于其他各组,PRL含量15d时显著高于A组;血清和乳中MT含量C和D组30～45d显著或极显著大于A组。说明外源性MT以12.0mg/头剂量效果最佳,间隔时间30～45d为宜。Effects of exogenous metallothionein（MT） on energy production and incretion of China Holstein cows were studied using 24 lactating cows,randomly allocated to groups A,B,C and D.MT was supplemented at 0.0,6.0,12.0 and 16.0 mg/capita,respectively,by intravenous injection.In groups B（during 1-30 d） and C（during 1-45 d）,corrected milk yields were higher than that in group A.In group C during 31-45 d,milk fat percentage was significantly improved by comparison with group A.The INS serum content of group A was significantly lower than that of group B at 30 d;IGF-Ⅰor T3 content of serum in group C was the highest at 45 d and the differences with group A were significant,while the IGF-Ⅰor T3 of production in group D was inhibited.The ranges of variation of FSH or E2 content in group C were the smallest of all the groups.The P content of in group B was significantly higher than that in other groups at 30 d,and the PRL content of group B was significantly higher than that in group A at 15 d.In groups B and C,MT contents of serum or milk were significantly higher than those in group A during the 30-45 d lactation period.In conclusion,the best choice was to supplement MT at 12 mg/capita for lactating cows by intravenous injection and a suitable time interval was once every 30-45 d.

关 键 词：金属硫蛋白 中国荷斯坦奶牛 产能性能 内分泌 

分 类 号：S823[农业科学—畜牧学]