Abstract: 【Objective】 In order to understand the growth and development law of the double lambs under natural grazing conditions, the purpose of the experiment is to find out the growth and development rules and to provide a theoretical basis for popularizing the breeding of the double lambs of Bashbai sheep.【Method】The experiment was carried out in the pastoral area of Tuoli County, Tacheng Prefecture, Xinjiang. A random sampling method was used to select 30 pairs of Bashiby sheep with a difference of birth time within 24 h. The body weight measurement and recording were performed every 30 days, and the obtained data was input into an Excel table for sorting, and the difference analysis was performed using SPSS 19.0 software. 【Result】The average weight difference between male and female lambs was not significant (P >0.05). There was no significant difference in average weight between male and female lambs at 90 days (P > 0.05), indicating that the sex of two lambs from birth to 90 days had little effect on the weight gain of male and female lambs. The average body weight of the double lambs at 90 days was 1/3 of the standard weight of the young sheep. From birth to 90 days, the average daily weight gain of the male lambs was 206 g / d, and that of the female lambs was 186 g / d, indicating that the two lambs had the characteristics of rapid growth and development, and the average daily weight gain of the male lambs was 206 g / d from birth to 90 d. From birth to 90 days, the growth intensity of male lambs was 85.75%-35.38%, and the female lambs' growth intensity was 76.38%-34.69% respectively. The growth intensity was higher but the downward trend was slower than those of Bashbai sheep and Yumule white lambs at the same age.【Conclusion】The sex of Bashiby sheep has little effect on the growth of average body weight from birth to 90 days, and it has the characteristics of fast growth and high growth intensity. Therefore, when raising the double lambs of Bashiby, it is necessary to focus on the advantages of this, choose pasture-rich pastures or give a certain amount of supplementary feeding to maximize the growth and development potential.

Key words: Bashiby sheep; double lamb; growth and development

摘要： 【目的】分析自然放牧条件下的巴什拜羊双羔生长发育规律,了解羔羊肉型巴什拜羊双羔的生长发育规律,为推广饲养巴什拜羊双羔提供理论依据。【方法】试验在新疆塔城地区托里县牧区进行,采用随机抽样的方法,选取出生时间相差24 h以内的巴什拜羊双羔30对,每30 d进行体重体尺的测量和记录,将所得数据输入Excel表中进行整理,并用SPSS 19.0软件进行差异性分析。【结果】公母羔羊初生时的平均体重差异不显著(P>0.05),到90 d时,公母羔羊的平均体重差异不显著(P>0.05),巴什拜羊双羔从初生到90 d性别对体重增长影响不大;巴什拜羊双羔90 d平均体重占周岁羊标准体重的三分之一,从初生到90 d公母羔羊平均日增重为公羔206 g/d,母羔186 g/d,巴什拜羊双羔具有生长发育快的特点;从初生到90 d巴什拜羊双羔生长强度为公羔85.75%~35.38%、母羔76.38%~34.69%,比同日龄巴什拜羊单羔和也木勒白羊单羔的生长强度要高且下降趋势缓慢。【结论】巴什拜羊双羔在初生至90 d性别对平均体重的增长影响不大,并且具有生长发育快、生长强度高等特点。在饲养巴什拜羊双羔时,选择牧草丰富的草场或给予一定量的补饲,可以最大限度的发挥其生长发育的潜力。

关键词: 巴什拜羊, 双羔, 生长发育