摘要
将30头青年牛随机等分为3组,在其日粮中添加0,10.1及19.9mg/kg的锌,使日粮中锌的含量分别达到82.0,91.6及101.2mg/kg。结果发现,3组牛的采食量、体尺指标、血液中钙及主要微量元素含量均无明显变化(P>0.05)。与含101.2mg/kg锌的日粮相比,日粮中含91.6mg/kg锌时,日增重及饲料转化率分别提高31.6%和32.8%(P<0.05)
Thirty growing dairy heifers were randomly divided into three groups,0,10.1 and 19.9 mg/kg of zinc were added to the diets of each group respectively,whichmade up the total zinc contents for each group to 82.0,91.6 and 101.2mg/kg. The re-sults showed that there were no significant effects on the feed intake,body measure-ments,contents of calcium and trace elements in the blood among the experiment heifers(P>0.05).Compared with the diets with 19.9mg/kg of zinc,adding 10.1mg/kg ofzinc could increase the daily wieght gain and feed efficiency by 31.46%and 32.8%(P<0.05)respectively.
出处
《西北农业大学学报》
CSCD
1996年第4期55-58,共4页
Journal of Northwest Sci-Tech University of Agriculture and Forestry(Natural Science Edition)
关键词
锌
青年牛
生长发育
饲料利用
zinc,young dairy cattle,growth,feed utilization itrace elements