肉牛改良蒙古牛效果分析

上世纪70年代以来锡林郭勒盟先后引进安格斯、利木赞、夏洛来、西门塔尔等肉牛品种改良蒙古牛.分析测定了不同品种杂交一代公母牛及蒙古牛6月龄、18月龄和30月龄体重的变化规律.结果安蒙、利蒙、夏蒙、西蒙杂一代6月龄公母犊平均体重分别比同龄蒙古牛增加37.87 kg、40.60 kg、66.35 kg和43.71 kg,分别提高32.75%、35.11%、57.37%和38.0%.18月龄公母牛平均体重分别比同龄蒙古牛增加78.75 kg、96.73 kg、107.72 kg和100.59 kg,分别提高35.84%、44.02%、49.03%和45.78%.30月龄公母牛平均体重分别比同龄蒙古牛增加67.07 kg、84.86 kg、110.18 kg和116.26 kg,分别提高19.86%、25.13%、32.62%和34.42%.

Analysis of Improving Results of Mongolian Cattle Crossbred by Specialized Beef Breeds

In 1970s, specialized beef cattle breeds such as Angus, Limousin, Charolais, Simmental were introduced to crossbreed the Mongolian cattle. The body weights of F1 crossbreds of Mongolian cattle with different foreign beef breeds at 6 too, 18 too, and 30 mo of age were measured to analyze the changing patterns. The results showed that the average body weights of calves at 6 mo of age for F1 crossbreds of Angus, Limousin, Charolais, and Simmental with Mongolian cattle increased by 37.87 kg, 40.60 kg, 66.35 kg, and 43. 71 kg., respectively, average body weights at 18 mo of age by 78. 75 kg, 96. 73 kg, 107.72 kg, and 100.59 kg; average body weights at 30 mo of age by 67.07 kg, 84.86 kg, 110.18 kg, and 116.26 kg, which was increased by 19.86%, 25.13%, 32.62%, and 34.42% comparing to that of Mongolian cattle at the corresponding ages, respectively.