贵州思南黄牛杂交改良效果调查

An investigation in the effect of crossbreeding on Guizhou Sinan Cattle

通过对农户家庭饲养条件下的思南黄牛及其杂交F1代牛的初生、6月龄、12月龄、18月龄、24月龄的体尺、体重测定，并对饲养杂交牛的经济效益进行调查分析。结果表明：西×思F1、安×思F1、利×思F1代牛的主要体尺指标、初生重以及各年龄阶段体重比思南黄牛均有极显著提高（P〈0．01）；而3种杂交牛之间体尺、体重差异不明显（P〉0．05）；农户饲养1头杂交牛的经济收入比饲养1头思南黄牛增加37％～90％。

Body weight and body sizes indexes of Sinan cattle and the F1 hybrids at newborn, 6-, 12-, 18- and 24- month-old were measured, and the economic benefits from feeding hybrids were investigated in the present work. The re- suhs showed that the main indices of body sizes and body weight at newborn, as well as at the different ages of Simmental × Sinan, Angus × Sinan, Limousin × Sinan increased significantly （ P 〈 0.01 ）, while no obvious difference was observed among the three hybrids （ P 〉 0.05 ）. Compared with Sinan cattle, farmer might get higher income from raising the hybrids by 37% - 90%.