复合舔砖对奶牛蹄病及乳成分的影响

Influences of Compound Lick Brick on the Hoof Disease and Milk Composition of Cow

为验证某复合舔砖在奶牛泌乳后期对奶牛蹄病及乳成分等的影响,采用单因素配对试验设计,选用60头澳大利亚黑白花奶牛随机分为试验组和对照组,试验组放置复合舔砖于运动场内让牛自由甜食.每隔15d测查奶牛蹄病发病率、产奶量及乳糖、乳脂、乳蛋白、干物质含量.结果显示:与对照组比较,试验组蹄病奶牛有自愈者,产奶量下降缓慢;乳脂率、乳蛋白、乳糖和干物质随泌乳量的改变没有明显变化.

To testify the influences of compound licking brick on the hoof diseases of cows and milk composition in the later of lactation period,we chose 60 Australian Holstein and divided them randomly into the experimental group and the control group,in which we used the single factor experiment pair.We placed compound licking brick on the sports ground for the cows in the experimental group to take freely.Every 15 days,we tested the incidence rate,milk production quantity,lactose,lacto-protein,and dry material content.As the result showed,the self-recovery of cow extremity hoof sickness was found in the experimental group,and milk production quantity decreased slower than that of the control group.There were no significant change of butterfat rate,lacto-protein,the lactose and the dry material along with the change of milk yield.