民和县浅山地区无角陶塞特与本地改良羊杂交效果分析

在舍饲圈养的条件下,测定无角陶赛特和小尾寒羊半杂F1代初生时。3月龄和6月龄的生长发育指标。结果表明：F1羔羊初生重、3月龄和6月龄的活重分别为4.21kg,18.31kg和30.31kg,较当地小尾寒羊半杂羊提高0.97kg,3.85kg和8.29kg（P〈0.01）。F1羔羊的体高,体长,胸围,胸宽和尻宽均高于当地同龄半杂羊（P〈0.01）。

Effect of Hybridization of Poll Dorset and Local Improved Sheep in Sha llow-mountain Area of Minhe County

The indexes of growth and deVelopment were determined for sirst filial generation of Poll Dorset and half-blood Han-sheep with small-tail （Fl）at the birth and at the age of three and six months,the results showed that The live weight of F1 lamb at the birth,at the age of three and six months were 4.21,18.31 and 30.31kg which increased 0.97,3.85and 8.29kg than that of half-blood Han-sheep with small-tall （P〈0.01）,respectively.The withers height,the body length,the chest girth,the chest width and the thurl width of F1 lamb were more than those of contemporary half-blood Han-sheep with small-tail（P〈0.01 ）.