贵州黎平黄牛杂交改良初步研究

The Preliminary Study on Crossbreeding of Liping Yellow Cattle in Guizhou

对农户饲养的黎平黄牛及其与西门塔尔牛、安格斯牛、利木赞牛的杂交F_1代的初生、6月龄、12月龄、18月龄、24月龄的体重、体尺进行了测定，结果表明；(1)黎平黄牛经杂交改良后，各年龄阶段各主要体尺都有极显著提高(P＜0．01)，初生重和各月龄体重均有显著提高(P＜0．05)；(2)初生至24月龄平均日增重，西×黎F_1、安×黎F_1、利×黎F_1公(母)牛分别为395g(366g)、364g(332g)、391g(360g)，比黎平黄牛公(母)牛的192g(175g)分别提高了105。7%(109．1%)、89．6%(89．7%)、103．6%和105．7%)。

The body weight and body sizes of F1 crossbreds of Liping yellow cattle with Simmental or Angus or Limousin at 0, 6, 12, 18, 24 month-old were measured. The results showed that the main body sizes of crossbreds of Liping yellow cattle at all ages improved significantly （P〈0. 01）, which elimi- nated the shortcomings of small body construction of Liping yellow cattle, the birth weight and body weight at all ages were also increased significantly （P〈0. 05）3 the average daily gain of male and female F1 crossbreds of Simmetal （ Liping, Angus （ Liping, and Limousin （ Liping were 395 g, 366 g; 364 g, 332 g; 391 g, 360g; respectively, which were increased by 105.7%, 109. 1% 89. 6%, 89.7% and 103. 6%, 105.7% respectively compared with that of Liping yellow cattle of 195 g and 175 g.