泌乳期荷斯坦奶牛维生素A需要量的研究  

Study on Vitamin A Optimum Requirements of Lactating Holsteins

作　　者：赵国琦[1] 郭玉华[1] 孙龙生[1] 

机构地区：[1]扬州大学动物科学与技术学院,扬州225009

出　　处：《中国奶牛》2008年第9期7-10,共4页China Dairy Cattle

基　　金：国家科技支撑项目(2006BAD04A03-07)

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)。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）.

关 键 词：奶牛 维生素A 需要量 

分 类 号：S823.5[农业科学—畜牧学]