甘肃河西肃南牧区不同杂交组合肥羔生产效果研究

Fattening Performance of Different Lamb Hybrid Combinations in Sunan Pastoral Area of Gansu Province

为了探讨甘肃河西肃南牧区放牧条件下肥羔生产的优化模式,以黑头萨福克羊、特克塞尔羊和无角陶赛特羊等国外优良品种羊为父本,以当地甘肃高山细毛羊为母本,在相同管理条件下进行杂交对比试验。结果表明:黑萨甘细、特甘细和陶甘细等3个杂交组合F_1羔羊在断奶重、平均日增重和胴体重、净肉重、屠宰率等方面均高于甘高细(P<0.05或P<0.01);特甘细F_1羔羊在断奶重、平均日增重和胴体重、净肉重等方面均高于其他2个杂交组合及甘高细羔羊。黑头萨福克羊、特克塞尔羊、无角陶赛特羊与甘肃高山细毛羊杂交,F_1羔羊杂交优势明显,肉用性能好,可大大提高养羊业的经济效益,是肃南牧区生产优质肥羔肉的理想父本。综合增重速度、断奶体重及屠宰性能,在甘肃省肃南县皇城草原自然放牧条件下,特克塞尔羊(♂)×甘肃高山细毛羊(♀)是生产肥羔的最佳杂交组合。

In order to discuss the optimization model of lamb production under grazing conditions in Hexi Sunan pastoral area of Gansu province with introduced Black Suffolk, Texel, Polled Dorset as male parents and Gansu Alpine Merino as female parent, a comparative study on their hybrid effects was carried out under the similar management condition. The results indicated that the weaning weight,average daily gain,carcass weight,dressed meat weight,and dressing-out percentage of the three hybrid combinations FI of Black SuffolkxGansu Alpine Merino, Texel x Gansu Alpine Merino and Polled DorsetxGansu Alpine Merino were higher than those of Gansu Alpine Merino （P〈0.05 or P〈0.01 ）;the weaning weight,average daily gain,carcass weight, deressed meat weight of the TexelxGansu Merino F1 were higher than those of the other two hybrids and the Gansu Alpine Merino lambs. According to the growth rate, weaning weight and dressing percentage, Texel （♂）xGansu Alpine Merino （ 9 ） was the best hybrid combination for the production of fat lamb under the natural grazing condition of Huangcheng grassland in Sunan county, Gansu province.