黎平黄牛体重估测公式探讨

随机实测２６１头黎平黄牛的胸围，体斜长和体重，根据体重等于体积乘以密度（比重）的原则，采用回则分析方法进行了黎平黄牛体重估测公式的推导与验证。结果表明，黎平黄牛的性别对体尺与体重回归关系的影响差异不显著（Ｐ〉０．０５），合并公母牛的体尺体重数据。得出该品种总的体重估测公式；体重（ｋｇ）＝胸围＾２（ｍ）×体斜长（ｍ）×８８－８（ｒ＝０．９９７１，Ｓｙ／ｘ＝４．７０１）胸围，体斜长对体重的回归关系极显

A Study on the Formula of Estimated Body Weight for Liping Yellow Cattle

Chest measurement (CHM), body length (BL) and body weight (BW) of 261 Liping Yellow Cattles were randomly measured on hte sport to ascertain and verify the formula of its estimated BW in accoulance with the principle of that BW is equal to volume timed by density (specific gravity) using regression analysis method. The findings show that the influence on regression between males and females is no significant difference(P > 0.05). Therefore the data of both sexes was merged and a total formula of its estimated BW was made; BW(kg) = CHM2 (m) x BL(m) x 88 - 8 (r = 0. 9971, Sy/x =4. 701). There is a very significant regression between CHM, BL and BW (P < 0. 01 ). Tts standard error estimated is 4.701 kg and mean error for estimated BW is only 1. 75%. However, the BW of this varety is highly estimaed by 16. 8kg to 22.1 kg with Jhonssion's formula and its mean error is 7. 75%comparatively. It indicates that estimaed BW with the mentioned formula can more accurately represent the actual BW of Liping Yellow Cattle.