摘要
[目的]分析云南省某奶牛场奶牛群的产奶性状,旨在揭示相应的变化规律,以期为今后牛群的科学饲养管理提供基础和依据。[方法]利用昆明雪兰牛奶有限责任公司采用SAS系统对4个奶牛场1 954胎产奶量的测定数据,进行了统计分析,对泌乳曲线进行了拟合。[结果]成功拟合了牛群1～8胎的泌乳曲线,8个曲线方程的相关指数（R2）都在0.89以上,所拟合的泌乳曲线方程可靠性高。[结论]几乎所有胎次的泌乳奶牛产奶量都呈现了产奶量随泌乳月份逐渐下降的变化趋势,高产月份的产奶性能未充分表现。不同胎次的产奶量变化规律也不明显,高产胎次的高产性能表现不够充分。
[Objective]The aim was to analyze the current status of milking trait in a dairy cattle farm in Yunnan province, discover the changing rules during feeding, and to provided the scientific basis for the further feeding and management. [Method]Data of 1954 lactations of milk yield were used to analyze and fit the growth curve and milking curve by statistic analysis system （SAS）. [Result]The milking curves of the herd for the first to eighth lactations were fitted successfully and the R2 was above 0.89, which showed that the reliabilities of the curve equations were relatively higher. [Conclusion]Almost all the parities of milking cattle showed gradually decreased trends on milk yield with changing of milking period. The milk performance was not observed completely in the high yield milking months. The changing rules of milk yield with the parity were not obviously, and the high productivities were not shown fully in high yield milking parities.
出处
《中国牛业科学》
2009年第6期28-32,共5页
China Cattle Science
关键词
荷斯坦奶牛
产奶量
泌乳曲线
Hostein dairy cattle, Milk yield, Milking curve
