柯尔克孜马年龄、体尺与产奶量的相关分析

本文以柯尔克孜马为主要研究对象,研究其年龄、体尺对产奶量的影响。对新疆克孜勒苏柯尔克孜自治州畜牧改良兽医站提供的4岁至11岁之间的125匹马的资料进行不同年龄和不同体尺与产奶量之间比较及相关和回归分析。建立了两个估测柯尔克孜马产奶的回归模型。结果表明,4岁到7岁之间产奶量逐步增加,而10岁以后产奶量缓慢减少,其中7、8岁产奶量最高(4.15±0.10㎏、4.125±0.13㎏),其次于9岁(3.92±0.19㎏)。4~5岁马体尺与6~11岁马体尺之间有差异。柯尔克孜马产奶量与体高、体长、胸围和管围之间的相关系数分别于0.275、0.292、0.316、0.232,均有弱的极显著的相关(P0.01)。由此认为:柯尔克孜马的年龄到达6岁时才能完成成年马体尺标准;7~9岁是柯尔克孜马最佳的产奶年龄;马产奶量受胸围的影响较高,次于体长。

Correlation Analysis of Ages and Body Sizes to Milk Productions in Kyrgyz Horse

This study used Kyrgyz horses as experimental animal model to study the influence of their ages and body sizes to the milk productions. [Method] 125 horses between 4 to 11 years old, provided by Animal Husbandry and Veterinary Station in Kirgiz Autonomous Prefecture of Xinjiang, were conducted at comparison, correlation and regression analysis between different ages along with different body size and milk production.The milk production increased gradually from 4 to 7 years old, but it decreased slowly after 10 years old. The most production of them were 7 and 8 years old (4.15 ± 0.10 ㎏, 4.125 ± 0.13 ㎏) ,which was second in 9 years old (3.92 ± 0.19 ㎏). Whatmore, there were differences in body sizes between 4 to 5 years old and 6 to 11 years old. The correlation coefficients between milk production and height, body length, heart girth among with cannon circumference in Kyrgyz horse were separately 0.275,0.292,0.316,0.232 , which showed out extremely weak significant correlation (P< 0.01). We established two estimated regression models of milk production in Kyrgyz horse. ① when Kyrgyz horse is at the age of 6, it can meet the standards of adult horse’s body size. ② Ages of 7-9 are the best for the milk production in Kyrgyz horse. ③ Heart girth has greater influence to the milk production, secondary to body length.