| 草原红牛乳脂率变化规律的研究 |
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| 引用本文： | 李凤学 陈春芳. 草原红牛乳脂率变化规律的研究[J]. 中国牛业科学, 1998, 24(4): 1-2 |
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| 作者姓名： | 李凤学 陈春芳 |
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| 作者单位： | [1]张家口农业高等专科学校牧工医 [2]河北农业大学畜牧兽医系 |
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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 牛 变化规律 |
Variation Regularity of Milk Fat Rate of Red Steppe Cattle |
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| Li Fengxue. Variation Regularity of Milk Fat Rate of Red Steppe Cattle[J]. China Cattle Science, 1998, 24(4): 1-2 |
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| Authors: | Li Fengxue |
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| Abstract: | The average rate of milk fat of Red steppe was 3.35%. With age increasing, milk fat rate droped gradually by 3.73% at the age of 4 years old to 3.13% at the age of a years old. with delivery number increasing, milk fat rate also droped gradually by 4.00% at first delivery to 3.14% at sixth delivery. With lactation month increasing, milk fat rate was higher in two ends of lactation period than in the middle period of lactation. |
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| Keywords: | red steppe milk fat rate |
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