短期营养补饲对放牧戈壁短尾母羊繁殖性能的影响

由于荒漠草原牧草产草量和营养价值的季节性变化,母羊配种期前营养物质摄入不足,导致母羊繁殖力较差。通过优化放牧戈壁短尾母羊配种期前饲料营养搭配,在配种前25 d给母羊饲喂高营养饲料,短期内提高母羊营养补饲水平。结果表明：短期高浓度营养补饲后,2个试验组母羊的产羔率分别比对照组提高6.40%、19.69%,产双羔率分别比对照组提高6.92%、10.20%。在该种短期营养补饲模式下,母羊的产羔性能得到一定程度的提升,并且牧民的养羊收入得到提高。

Effects of Short-term Nutritional Supplementary Feeding on Reproductive Performance of Gobi Short-tailed Ewes

Due to the seasonal variations of forage yield and nutritive value in desert grassland, the lack of nutrimental intake before mating period always leads to the poor fertility of ewes. To assess the short-term nutritional supplementary feeding on reproductive performance of freely grazed Gobi short-tailed ewes, an optimized dietary nutrition collocation scheme with high-nutrition feed were provided for the ewes 25 days before mating to improve the nutritional supplementation level in a short period of time. The results showed that the lambing rate of the ewes in the two experimental groups was 6.40% and 19.69% higher than that of the control group after short-term high-concentration supplementation, and the twin lambing rate was 6.92% and 10.20% higher than that of the control group. In this short-term nutritional supplementary feeding mode, the lambing performance of the ewes are improved to a certain extent, and the economic income of the herdsmen′s sheep raising is improved.