日粮蛋白水平和烟酸对热应激奶牛的影响

The Effect of Protein Level and Niacin on the Production of Dairy Cows under Heat Stress

为缓解热应激条件下,奶牛蛋白质摄入量和利用效率降低问题,本文研究日粮蛋白水平和烟酸对秸秆型日粮奶牛生产的影响。结果表明,提高日粮蛋白水平、添加烟酸可以显著提高干物质采食量、产奶量和经济效益。

The effect of protein level and niacin on dairy cows was studied,to increase the intake quantity and utilization efficiency of protein under heat stress.The result of the experiment indicated that improving protein level or supplement by pass protein or niacin could improve dry matter intake,milk production quantity and economic benefit significantly.