乌鞘岭半农半牧区冷季暖棚全舍饲对绵羊生产效益的影响

于2008年12月－2009年4月在乌鞘岭半农半牧区随机选择10个牧户，各牧户草地类型一致，绵羊体况相近，其中5户采用全舍饲的饲养模式（试验组），另外5户采用放牧+补饲的饲养模式（对照组），开展冷季不同饲养模式对绵羊生产效益影响的试验。结果表明，试验组和对照组母羊体质量在产羔后1个月内分别下降了1.17和2.71 kg。产羔1个月后试验组母羊体质量开始恢复，而对照组母羊体质量持续降低；产羔后3个月对照组母羊平均掉膘5.96 kg，占体质量的13.91%，试验组体质量增加0.68 kg。两组羔羊的初生体质量差异不显著(P>0.05)，但试验组羔羊生长速度高于对照组，羔羊2月龄体质量及出栏体质量显著高于对照组(P<0.05)。经济效益分析表明，试验组收入较对照组高出20.27元·只-1。

Effects of pen-fed on farmers’ income of sheep production in cold season in semi agricultural and semi pastoral area in Wushaoling Mountain of Qing-hai Tibetan plateau

In order to study the effects of sheep management patterns on farmers’ income,ten households were selected in semi agricultural and semi pastoral area in Wuahaoling Mountain.In each household there were at least 30 pregnant ewes with 3-years-old and the body weight of these ewes were similar.Sheep from five households were fed in pen in cold season,which were classified in test group.At the same time,sheep from the other five household grazed in day and got supplementary feeding in the evening,which were classified in the control group.The results showed that the ewes’ weights of two groups decreased by 1.17 and 2.71 kg after the lambs born one month,respectively.Then the body weights of test group started to recover and they gained 0.68 kg on average at the end of three months after the lambs were born.However,for the control group,they continued to lose body weight.At the end of three months after the lambs born,these ewes lost their weight by 5.96 kg on average,which accounted for 13.91% of the original weight.The born weight of lambs between two groups had no significant difference,but average daily gain of the test group was significantly higher than that of the control group,and the lambs’ body weights of test group in two months and at the sale time were significant higher than the control group(P<0.05).Farmers’ income of the test group was 20.27 Yuan·ewe-1 higher than that of the control group.