青藏高原不同品种绵羊应用TIT双羔素效果试验

A Test On Testosterone Immunization Twin-lambs(TIT)Immuned Difference Breed Sheep In Qinghai-Tibetan Highland

1996— 1998年连续三年在青海东部农业区和环青海湖地区用TIT对不同品种绵羊进行了免疫试验 ,共免疫母羊 3 448只。试验结果表明 :1.青海细毛羊双羔率 14 .8% ,双羔成活率 80 .2 7% ,与半细毛羊差异不显著 (14 .3 6%、88.89% ) (P >0 .0 5 ) ;2 .半细毛羊双羔率 18.3 9% ,极显著高于藏羊 (4 .2 9% ) (P <0 .0 1) ,半细毛羊双羔成活率 5 6.2 5 % ,与藏羊差异不显著 (66.67% ) (P >0 .0 5 ) ;3 .农区半细毛羊双羔率 16.67%、双羔成活率 81.2 5 % ,与牧区半细毛羊差异不显著 (18.3 9%、5 6.2 5 % ) (P >0 .0 5 )。

A immunization test that 3 448 ewes of three breed sheep were immuned with Testosterone Immunization Twin lambs(TIT) was carried out in eastward district of Qinghai and a zone round Qinghai Lake from 1996 to 1998.The results were that the twin lambs rat (TR) and the survival rate (SR) of Qinghai fine wool sheep and semifine wool sheep were 14.8%,14.36%,80.27% and 88.89% respectively,the TR and the SR were all no difference between the two breed sheeps.The semifime wool sheep′s TR was significant higher than Tibetan sheep′s (P<0.01),but the SR was no difference between semifine wool sheep and Tibetan sheep (P>0.05).The TR and the SR of simifine wool sheep of the eastward district of Qinghai and the zone round Qinghai lake were 16.67%,18.39%,81.25% and 56.25% respectively,the TR and the SR of simifine wool sheep were all no difference between the eastward district of Qinghai and the zone round Qinghai lake(P>0.05).