| 泌乳期荷斯坦奶牛维生素A需要量的研究 |
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| 引用本文： | 赵国琦,郭玉华,孙龙生.泌乳期荷斯坦奶牛维生素A需要量的研究[J].中国奶牛,2008(9):7-10. |
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| 作者姓名： | 赵国琦 郭玉华 孙龙生 |
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| 作者单位： | 扬州大学动物科学与技术学院,扬州,225009 |
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| 摘 要： | 本试验选择12头荷斯坦泌乳期奶牛，采用3×3拉丁方设计研究了维生素A的需要量以及维生素A对乳成分、抗体、抗氧化性能及血清和牛奶中维生素A浓度等的影响。结果表明：维生素A适宜添加量是1250000IU／d，在此剂量下产奶量最高；在适宜范围内，维生素A剂量的增加，对乳脂、乳蛋白、乳糖和游离脂肪酸的影响不显著（P〉0．05），而使抗体浓度都有不同程度的增加，但上升不显著（P〉0.05）；SOD和GSH有不同程度的增加，MDA有不同程度的下降，但变化不显著（P〉0.05）；血清和牛奶中的维生素A随之极显著上升（P〈0.01）。
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| 关 键 词： | 奶牛 维生素A 需要量 |
Study on Vitamin A Optimum Requirements of Lactating Holsteins |
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| Zhao Guoqi,Guo Yuhua,Sun Longsheng.Study on Vitamin A Optimum Requirements of Lactating Holsteins[J].China Dairy Cattle,2008(9):7-10. |
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| Authors: | Zhao Guoqi Guo Yuhua Sun Longsheng |
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| Institution: | Zhao Guoqi, Guo Yuhua, Sun Longsheng (College of Animal Science and Technology, Yangzhou University, Yangzhou 225009) |
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| Abstract: | In this experiment, twelve lactating Holsteins were chosed and 3×3 latin square design were adopted to research the requirement of vitamin A of lactating Holsteins and effect of different levels of vitamin A supplemented in diets on milk fat, lactoprotein, milk suga, SCC, concentration of vitamin A in milk and serum. The results were as follows： the optimum level of dietary supplemental vitamin A of lactating holsteins was 1 250 000IU/d.There were significantly difference in milk fat, laetoprotein, milk suga, antibodies, SOS,MDA,GSH,NEFA（P〉0.05）. As the concertration of vitamin A in diets increased, the concentration of vitamin A in serum mounted up significantly（P〈0.01）. |
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| Keywords: | Milk cow Vitamin A Requirement |
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