摘要
将20只健康、体重相近的7月龄滩母羊随机分为5组,进行单笼饲养,设计5种不同营养水平的日粮分别饲喂5组育成母羊,来探究日粮营养水平对育成期滩母羊生长发育的影响。结果表明:试验Ⅳ组的增重最快,其平均日增重最高达(127.22 g/d);育成羊随着年龄的增长,体重增长速度下降。在本试验条件下,随着日粮营养水平的提高,育成滩母羊的总增重、平均日增重、干物质采食量均显著增加(P<0.05),而料重比不断下降。各试验组羊只的体长、体高和管围的变化无显著性差异(P>0.05),而胸围的增长幅度有显著性差异(P<0.05)。结合日增重、体尺指标、生产性能、经济效益等指标,可知试验Ⅳ组的营养水平(CP:15.94%,ME:10.18 MJ/kg)能显著改善羊只生长发育,提高生产性能,获得最高的经济效益。
In this paper, 20 healthy 7-month-old post-bred Tan ewes with the similar body weight were randomly assigned to five groups, and each of the Tan ewes were fed in the single cages. Five groups were fed diets with different nutrition level, including daily ration of group m reference to the NRC sheep raising standards and the actual breed situation of Tan sheep feeding farm to carry on the formulation. The daily ration of group Ⅰ and group Ⅱ were respectively 0. 8 times and 0. 9 times of group Ⅲ, the daily ration of group Ⅳ and group V were respectively 1.1 times and 1.2 times of group m. In order to investigate the influence of different nutrition levels on Tan sheep growth. The results showed that the weight gain of group Ⅳ were the biggest, and the average daily gain reached 127.22g/d. The growth rate of body weight declined with age. With the improvement of dietary nutrient level, the body weight, average daily gain and feed intake of dry matter of tan ewes were significantly increased （P〈0. 05） , while feed-weight ratio continuously declined. There were no significant differences in the variation of body length, body height and pipe circumference （P〈0. 05）, but there was significant difference in the growth of the chest circumference （P〈0. 05）. Combining with ADG, body-size, production performance and economic benefit, the nutrition level of groupiV （CP： 15.94%, ME： 10. 18MJ/kg） can significantly improve the growth and development, production performance of Tan sheep, as well as obtain the highest economic benefit.
出处
《畜牧与兽医》
北大核心
2017年第5期46-50,共5页
Animal Husbandry & Veterinary Medicine
基金
宁夏十二五重大科技攻关项目(2012ZDN1003)
关键词
日增重
体尺指标
生产性能
经济效益
average daily gain
body-size indexes
production performance
economic benefit
