蚂蚁山奶牛场奶牛常用体尺指数的计算及分析

Calculation And analysis on body Measurement Index most in use of Holstein Cows in Mayishan Cow Farm

在蚂蚁山奶牛场,随机抽取荷斯坦在产成母牛401头(1～≥4胎)进行奶牛常用体尺指数的计算和分析.结果表明:蚂蚁山奶牛场荷斯坦奶牛肢长指数、体长指数、髋宽指数、胸宽指数、体躯指数、尻高指数、尻宽指数的平均水平分别是44.09%、118.87%、86.96%、55.46%、126.69%、103.85%和43.31%.其中,尻高指数随胎次的升高而下降;而髋宽指数、胸宽指数随胎次升高而变化的趋势是1胎最低,2胎最高,3胎、≥4胎又逐渐略有下降.就奶牛常用体尺指数的总体情况而言,尻高指数、髋宽指数、体躯指数的表现较佳,尻宽指数的表现较差.

The results showed as follows： in Mayishan cow farm, the means of limb length index, body length index, thurl width index, chest width index, body trunk index, rump height index and rump width index were 44.09%, 118.87%, 86.96%, 55.46%, 126.69%, 103.85% and 43.31% respectively. Among them, rump height index decreased according to the raise of parity, the change of thurl width index according to the raise of parity was consistent with chest width index, that was to say, it was the lowest at 1 p%rity and was the highest at 2 parity, then it decreased gradually at 3 and ≥4 parity. So far as the general condition of body measurement index most in use of Holstein cows, rump height index, thurl width index, and body trunk index were better, while rump width index was worse.