天华羔羊的早期断奶时间和代乳品选择  

Early Weaning Time and Milk Substitute Selection of Tianhua lambs

作　　者：王淑芳 王斌 杨如杰 王雅琪 WANG Shufang;WANG Bin;YANG Rujie;WANG Yaqi(Animal Disease Control and Prevention Center of Tianzhu County,Tianzhu 733299,China;Tianzhu County Breeding Institute,Tianzhu 733299,China)

机构地区：[1]天祝县动物疫病预防控制中心,甘肃天祝733299 [2]天祝县种畜繁育研究院,甘肃天祝733299

出　　处：《青海畜牧兽医杂志》2023年第6期24-28,共5页Chinese Qinghai Journal of Animal and Veterinary Sciences

基　　金：天祝县天华美利奴肉羊新品种培育关键技术研究与示范项目(2023WW00155)。

摘　　要：为探讨不同断奶时间和不同营养水平代乳品对天华肉羊羔羊生长发育的影响,在放牧条件下,选取70只30日龄的羔羊分为7组,其中试验组(第1、2、3、4、5、6组)分别于30、45、60 d断奶并用2种代乳品(A、B)人工饲喂20 d,然后于同等条件下育肥,对照组(第7组)随母羊自由哺乳,统计各组羔羊断奶时、停止饲喂代乳品时及80 d的体重,对比分析不同断奶时间和代乳品对羔羊生长发育的影响。结果显示,30 d断奶的1、2组掉膘严重,体重均低于对照组;45 d断奶组应激反应小,其中第3组日增重比对照组高出35.50%,第4组高出40.20%;60 d断奶的第5组日增重比对照组高出39.90%,第6组高出47.30%。考虑饲养成本、人工成本等因素,认定60 d为天华羔羊最经济、合理的断奶时间,2种代乳品中粗蛋白质含量≥26%、粗脂肪≥16%的代乳品B更适合天华羔羊的生长发育。In order to investigate the effects of different weaning time and different nutrient levels of milk sub⁃stitute on the growth and development of Tianhua mutton lambs,7030-day old lambs were selected and divided into 7 groups under grazing conditions.The experimental group(groups 1,2,3,4,5 and 6)were weaned on 30-d,45 d and 60 d respectively with two kinds of milk substitute(A and B)for 20 days,and then fattened under the same conditions.In group 7(control group),the body weight of lambs at weaning,stopping feeding milk replacer and at 80 days were counted,and the effects of different weaning times and milk replacer on the growth and development of lambs were compared and analyzed.The results showed that the 30 d weaning group had serious weight loss,and their weight was lower than that of the control group,and the stress reaction of the 45 d weaning group was lower,and the daily gain of the group 3 was 35.50%higher than that of the control group.The group 4 was 40.20%high⁃er;The daily gain of the group 5 weaned at 60 d was 39.90%higher than that of the control group,and that of the group 6 was 47.30%higher.Considering the factors such as feeding cost and labor cost,60 d was considered as the most economical and reasonable weaning time for Tianhua lambs.The milk substitute with crude protein content≥26%and crude fat≥16%in the two milk substitutes were more suitable for the growth and development of Tianhua lambs.

关 键 词：天华羔羊 早期断奶时间 代乳品 

分 类 号：S826[农业科学—畜牧学]