| 摘要: |
| 将30头青年牛随机等分为3组,在其日粮中添加。,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紊含量均无明显变化(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)。 |
| 关键词: 锌，青年牛，生长发育，饲料利用 |
| DOI： |
| 分类号:S823.5 |
| 基金项目: |
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| Effects of Zinc on the Performance of Growing Heifers |
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Yao Junhu Cao Binyun Dou Chcn Wu Jidong Yang Xingmao Li Anxian
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| Abstract: |
| 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,which made up the total zinc contents for each group to 82.0,91.6 and 101.2mg/kg. The results showed that there were no significant effects on the feed intake,body measurements,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 of zinc could increase the daily wieght gain and feed efficiency by 31.46%and 32.8% (P<0.05) respectively. |
| Key words: zinc,young dairy cattle,growth,feed utilization itrace elements |
