| 草原红牛年龄、泌乳月对乳脂率的影响 |
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| 引用本文： | 李凤学,陈春芳.草原红牛年龄、泌乳月对乳脂率的影响[J].河北北方学院学报(自然科学版),1997(2). |
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| 作者姓名： | 李凤学 陈春芳 |
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| 作者单位： | 张家口农业高等专科学校牧业工程系 075131
(李凤学)，河北农业大学畜牧兽医系 071001(陈春芳) |
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| 摘 要： | 草原红牛的平均乳脂率为3.35%,随年龄的增长而逐渐下降,由4岁的3.73%降到9岁的3.13%;随胎次的增加也逐渐下降,由1胎的4.0%到6胎降到3.14%;随泌乳月的延长而呈两头高中间低的曲线变化。
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| 关 键 词： | 草原红牛 乳脂率 |
THE EFFECTS OF DELIVERY AGE AND LACTATION MONTH OF RED STEPPE CATTLE ON MILK FAT RATE |
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| Li Fengxue et al..THE EFFECTS OF DELIVERY AGE AND LACTATION MONTH OF RED STEPPE CATTLE ON MILK FAT RATE[J].Journa of Hebei North University:Natural Science Edition,1997(2). |
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| Authors: | Li Fengxue |
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| Abstract: | The average rate of milk fat of Red steppe cattle was 3.35%.With age increasing,milk fat rate droped gradually by 3.73% on 4 old year to 3.13% on 9 old year.With de-livery number increasing,milk fat rate also droped gradually by 4.00% at first deliveryto 3.14% at sixth delivery.With lactation month increasing,milk fat rate was higherboth front and behind of lactation period than in middle period of latation. |
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| Keywords: | Red steppe cattle Milk fat rate |
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