摘要
以安徽淮南乳品公司为试验试点,随机抽取荷斯坦奶牛493头(1～11胎),进行奶牛体型线性评定中泌乳系统性状即前房附着、后房高度、后房宽度、悬韧带、乳房深度、乳头位置和乳头长度的线性选择评定及分析.结果表明:淮南地区荷斯坦奶牛泌乳系统性状的表现中等偏好,前房附着、后房高度、后房宽度、悬韧带、乳房深度、乳头位置、乳头长度的线性评分分别是31.95、46.98、29.09、37.47、15.08、39.74和20.82分,评定等级各为佳、优、好、良、中、良、中.同时,后房高度、后房宽度、乳头位置的线性评分随胎次变化而变化很小且无规律可循,各胎次几乎相同;乳头长度、悬韧带的线性评分随胎次升高而增加,但后者幅度很小;前房附着、乳房深度的线性评分均表现随胎次的升高而降低的趋势.
The results showed as follows: in Huainan area,the standard of mammary system traits of Holstein cows was better than Fair (F),the linear marks of fore udder attachment,rear udder height,rear udder width,udder cleft,udder depth,teat location,and teat length were 31.95,46.98,29.09,37.47,15.08,39.74 and 20.82 respectively,and the assessment ranks of them were Good Plus (G+),Excellent (EX),Good (G),Very Good (VG),Fair (F),Very Good (VG),and Fair (F) respectively. At the same time,the linear marks of rear udder height,rear udder width,and teat location varied little and didn't demonstrate the regularity according to the change of fetal frequency,furthermore those of teat length and udder cleft increased according to the raise of fetal frequency,and the scope of increasing of the latter was very small,while those of both fore udder attachment and udder depth showed the tendency of decreasing according to the raise of fetal frequency.
出处
《中国草食动物》
2005年第2期12-14,共3页
China Herbivores
基金
安徽省教育厅优秀人才课题(2003JQ145)资助
