高锌日粮对奶牛产乳性能及血锌含量的影响  

Effects of high zinc dietary on milk production and serum zinc content of dairy cattle

作　　者：欧阳建华[1] 黄爱民[1] 刘宝生[1] 

机构地区：[1]江西农业大学动物科技学院

出　　处：《中国饲料》2005年第17期14-16,18,共4页China Feed

摘　　要：选择经产期和产奶量相近的健康中国荷斯坦奶牛50头,完全随机分成5组,每组10头,分别饲喂基础日粮及添加150mg/kg和300mg/kg的有机锌和无机锌日粮。结果表明:1)添加150mg/kg和300mg/kg的锌对牛奶中乳脂率、乳蛋白、乳糖和非脂固形物(SNF)含量无显著影响(P>0.05);2)无机锌对产奶量无显著影响(P>0.05),而添加有机锌则可显著提高奶牛产奶量(P<0.05);3)高锌可极显著(P<0.01)提高血锌和乳锌含量,而且血锌与乳锌之间存在线性相关(r=0.627,n=50)。Fifty Holstein cows,with similar performance and partum time,were randomly divided into 5 groups with 10 cattles per treatment.The effects of high zinc dietary on performance and milk component were studied.The results were as follows：1）There were no effects （P 〉 0.05）on milk fat,protein,lactose and solids-not-fat （SNF） by the supplementation of zinc ;2）No effects on milk production existed except organic zinc supplementation （P 〈 0.05 ）;3）Adding zinc extremely （P 〈 0.01 ）increased zinc content in serum and milk,furthermore,there was a liner correlation between serum zinc and milk zinc（r =0.627,n = 50）.

关 键 词：荷斯坦奶牛 高锌日粮 产乳性能 乳锌 血锌 

分 类 号：S816.7[农业科学—饲料科学]