本试验旨在研究饲粮中不同水平棉秆对母羊生长性能和繁殖性能的影响。试验采用单因素完全随机试验设计，将120只试验羊随机分为6组，每组20只。对照1组（CK1组）饲粮中不含棉源饲料，对照2组（CK2组）含棉籽粕、不含棉秆。在CK2组饲粮基础上，试验组饲粮分别添加20%（A组）、30%（B组）、40%（C组）和50%（D组）棉秆。结果表明：1）随饲粮中棉秆水平的增加，生产母羊干物质采食量和断奶体重组间差异不显著（P>0.05）。2）总受胎率CK2组比CK1组高3.92个百分点，比B和D组分别低13.62和9.41个百分点。繁殖率CK2组比CK1组低10.79个百分点，B组比CK2、A、C和D组分别高52.01、80.11、67.89和27.89个百分点；窝产仔数CK1组比CK2组高0.11只，CK2组比A、C和D组分别高0.24、0.16和0.07只，比B组低0.08只；产羔率CK1组比CK2组高17.65个百分点，B组比CK2、A、C和D组分别高49.23、70.47、61.58和16.58个百分点。3）不同水平棉秆饲粮对羔羊初生重无显著影响（P>0.05）。三羔管围CK2组分别比B和D组极显著提高18.90%和24.29%（P<0.01）。本试验结果表明，棉秆可以作为生产母羊粗饲料来源，饲粮中添加20%~50%棉秆对母羊生长性能、繁殖性能及羔羊初生重和体尺无显著影响；饲粮中添加棉籽粕对羔羊初生体重和体尺无显著影响，但会降低窝产仔数及公羔比例。

This experiment was conducted to investigate the effects of different levels of cotton stalk in diets on growth performance and reproductive performance of ewe. One hundred and twenty sheep were randomly assigned to six groups with ten sheep in each group by a single factor completely randomized design. The diet of control group 1 (group CK1) did not contain cotton source feed, and control group 2 (group CK2) contained cottonseed meal and without cotton stalk. On the basis of CK2 diet, the trial group diets were supplemented with 20% (group A), 30% (group B), 40% (group C) and 50% (group D) cotton stalks, respectively. The results showed as follows:1) no significant effect on dry matter intake and weaned weight were found with the increasing level of cotton stalk (P>0.05). 2) Total conception rate in group CK2 was higher than that in group CK1 by 3.92 percent point, and lower than that in groups B and D by 13.62 and 9.41 percent point. Reproduction rate in group CK2 was lower than that in group CK1 by 10.79 percent point; the reproduction rate in group B was higher than that in groups CK2, A, C and D by 52.01, 80.11, 67.89 and 27.89 percent point; litter size in group CK1 was higher than that in group CK2 by 0.11, and the litter size in group CK2 was higher than that in groups A, C and D by 0.24, 0.16 and 0.07; lambing rate in group CK1 was higher than that in group CK2 by 18.65 percent point; the lambing rate in group B was higher than that in groups CK2, A, C and D by 49.23, 70.47, 61.58 and 16.58 percent point. 3) No significant effect on birth weight of lambing was found with the increasing level of cotton stalk; triplet tube circumference in group CK2 was significant higher than that in groups B and D by 18.90% and 24.29%, respectively (P<0.01). Under this experimental condition, cotton stalk can be used as an roughage in ewe production. There are no significant effects on growth performance and reproductive performance of ewes, and there are no significant effects on birth weight and body size of lambs when the level of cotton stalks in the basal diet are 20% to 50%. There are no significant effects on birth weight and body size when cottonseed meal was added to diet of ewes, but it can reduce the litter size and male lamb ratio.