辽宁地区西门塔尔种公牛体重变化与生产性能之间的关联分析

Correlation analysis between Weight change and Production performance of the Simmental bull in the Liaoning Area

为了解公牛体重的变化对生产性能的影响,本研究选取相关生产资料进行统计分析。结果显示,在500～800kg体重之间,初采精量和精子密度与体重无关;在500～1100 kg范围内,体重每季度在100 kg之间变化不影响相邻季度的相关生产性能,一个生产周期内体重在200kg之间变化对整体生产性能不产生影响;在相同饲养管理条件下,同龄牛在同一个生产周期内,其生产性能曲线基本保持一致,可以通过不同月平均生产性能值的大小来评定不同牛只的好坏,而且该评定与体重无关。

To determine the correlation between weight change and production performance of bull, the related production data was analysed. The results showed that no correlation was found between the weight and Initial average ejaculate volume and average sperm concentration, when the weight of bull in the range of 500 kg to 800 kg. The related production performance of the next quarter was not affected when the weight, from 500 kg to 1 100 kg, changed between 100 kg. And no effect was found on the production performance in one cycle production when the weight changed between 200 kg. The trend curve of production performance in one cycle production was similar when the same age bull under the same management conditions. The average value of the production performance in the same month can be used to evaluate the performance of different bulls, which had no correlation with the weight.