| 锌对青年牛生长发育的影响 |
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| 引用本文： | 姚军虎,曹斌云,窦 械.锌对青年牛生长发育的影响[J].西北农林科技大学学报(社会科学版),1996,24(4):55-58. |
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| 作者姓名： | 姚军虎 曹斌云 窦 械 |
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| 作者单位： | 西北农业大学动物科学系，陕西省陇县白牛寺奶牛场，北京市双桥农场奶牛场 |
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| 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）
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| 关 键 词： | 锌 青年牛 生长发育 饲料利用 |
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.Effects of Zinc on the Performance of Growing Heifers[J].Journal of Northwest Sci-Tech Univ of Agr and,1996,24(4):55-58. |
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| Authors: | Yao Junhu Cao Binyun Dou Chcn Wu Jidong Yang Xingmao Li Anxian |
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| Institution: | Yao Junhu;Cao Binyun;Dou Chcn;Wu Jidong;Yang Xingmao;Li Anxian(Department of Animal Science,Northwestern Agricultural University, Yangling,Shaanxi,712100)(Bainiusi Dairy Farm,Lonxian County,Shaanxi,721200) |
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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,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. |
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| Keywords: | zinc young dairy cattle growth feed utilization itrace elements |
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