双羔素免疫对山羊繁殖性能的影响

Effects of Active Immunization Against TIT on Fertility in HuangHuai White Goat

将20只2～2.5岁健康黄淮白山羊随机分为两组,一组在颈部皮下注射1 mL双羔素TIT,3周后重复一次。另一组按同样的方法注射两次等剂量的生理盐水作为对照。加强免疫后进行发情同期化处理,有16只母羊发情,自然交配后观察并记录母羊的妊娠期、产羔率、羔羊成活情况和初生重等。结果显示,免疫组母羊的产羔率显著高于对照组(P<0.05),按提高产羔率的绝对值计算;试验组比对照组提高了35.3％,产活羔数平均提高0.5头,提高了18.7％。因此双羔素免疫可以显著提高初生羔羊的总体重(P<0.05),但并不能有效地提高活羔的初生总体重(P<0.05)。免疫组与对照组母羊的妊娠期无显著差异(P>0.05)。妊娠期试验组为141.83 d,比对照组143.33 d缩短了1.5 d。妊娠期与产羔率之间有显著的负相关。

The immunization against steroid hormones could improve the fertility of female mammals. The present study was to investigate the effects of TIT on the fertility in Huanghuai White goat. Twenty healthey she-goats,2-2. 5 years old . 20~25kg weight, were equivalently divided into two groups at random. One group were administrated hypodermically with 1ml TIT, whose active ingredient is Testosterone-3-Carboxymethl-Oxime-Bovine Serum Albumin . And this injection was repeated once 3 weeks later. As the same way, the control was treated with 1ml physiological saline twice . The results show that the active immunization against TIT significantly improve (P<0. 05) the birth rate (treated group vs control, 383. 3±61.1% vs 283. 3±55. 6%). The rate of survival lamb however, has no signifi cant difference (361. 7±55. 6% vs 266. 7±66. 7%),P>0. 05. The administration could enhance the rate of survival lambs by 18. 7%. The treatment of TIT has no statistically significant effect on gestational periods and the survivallambs' weight (P>0. 05). it is also found that there is significantly negative correlation between the litter sizes and the gestationsl prtiods(r=- 0. 6114. n = 12).