摘要
为了研究氨基酸平衡日粮饲喂奶牛的效果,试验采用配对试验设计,选择30头体况良好的健康中国荷斯坦奶牛头胎牛,分为2组,对照组饲喂基础日粮,试验组饲喂氨基酸平衡TMR日粮。测定了奶牛产奶量、乳成分、血液生化指标及繁殖性能指标。结果表明:试验组奶牛比对照组奶牛平均每日3.5%标准乳产量提高了2.56%(P<0.05);氨基酸平衡日粮的饲喂不影响牛乳的乳脂率、乳蛋白率、乳糖率等指标,但可显著提高总固形物含量及乳脂、乳蛋白产量(P<0.05);补充瘤胃保护性蛋氨酸和赖氨酸对奶牛血清葡萄糖、三酰甘油和总胆固醇含量没有显著影响(P>0.05),即对奶牛健康状况、繁殖性能无显著影响。说明通过饲喂氨基酸平衡日粮能显著提高奶牛的生产性能,具有改善奶牛代谢状况的趋势。
To study the feeding effects of amino acid balance diets on dairy cows, 30 healthy firstborn Chinese Holstein cows with good body con- dition were selected and divided into two groups using a paired experimental design, including a control group and an experimental group. The control group was fed the control diets, while the experimental group was fed amino acid - balanced TMR diets. The indexes of milk yield, milk composition, blood biochemical indexes and reproductive performance were determined in the dairy cows. The results showed that average daily yield of 3.5 % fat - corrected milk of the dairy cows in the experimental group improved by 2.56% （ P 〈 0.05 ） compared with the control group. The feeding of amino acid -balanced diets did not affect the milk fat percentage, milk protein ratio, lactose rate, and other indicators in milk, but could significantly increase（ P 〈 0.05 ） the contents of total solids, milk fat and milk protein yield. Supplementary rumen - protected methio- nine and lysine had no significant effects （ P 〉 0.05 ） on the contents of serum glucose, serum total triglyceride （ TG）, and total cholesterol （TCH） （P 〉 0.05 ）, furthermore, which had no significant effects on the health conditions and reproductive performance in the dairy cows. The results indicate that feeding the amino acid - balanced diets can significantly improve the productive performance of dairy cows, showing a trend for improvement in the metabolic status of dairy cows.
出处
《黑龙江畜牧兽医》
CAS
北大核心
2016年第1期90-93,共4页
Heilongjiang Animal Science And veterinary Medicine
基金
“十二五”国家科技支撑计划项目(2012BAD43B01)
关键词
奶牛
氨基酸平衡日粮
血液生化指标
乳成分
繁殖性能
生产性能
饲喂效果
dairy cow
amino acid - balanced diet
serum biochemical index
milk composition
reproductive performance
productive performance
feeding effect
