不同精粗比饲粮对秋季羔羊生长性能、养分表观消化率、瘤胃发酵和血清免疫指标的影响  

Effects of diets with different concentrate-to-coarse ratios on growth performance,nutrients apparent digestibility,rumen fermentation,and serum immune indexes of autumn lambs

作　　者：项斌伟 王兴岗 张建新[2] XIANG Bin-wei;WANG Xing-gang;ZHANG Jian-xin

机构地区：[1]右玉县现代农业发展服务中心,山西朔州037200 [2]山西农业大学动物科学学院,山西晋中030801

出　　处：《饲料研究》2024年第9期31-36,共6页Feed Research

基　　金：国家现代农业产业技术体系建设专项资金资助(项目编号:CARS-38);山西省现代农业产业技术体系建设专项资金资助;山西省1331工程建设项目。

摘　　要：试验旨在研究不同精粗比饲粮对秋季羔羊生长性能、瘤胃发酵、养分表观消化率和血清免疫指标的影响。试验选取4月龄“杜泊×小尾寒羊”F1代杂交公羔30只,随机分为3组,每组10个重复,每个重复1只羊。试验Ⅰ组、Ⅱ组、Ⅲ组分别饲喂精粗比为40∶60、55∶45、70∶30的饲粮。结果显示:试验Ⅲ组羔羊的平均日增重显著高于试验Ⅰ组(P<0.05),试验Ⅱ组和Ⅲ组料重比显著低于试验Ⅰ组(P<0.05)。试验Ⅰ组干物质、有机质、粗蛋白和中性洗涤纤维的表观消化率均显著低于其他组(P<0.05),试验Ⅱ组有机物的表观消化率显著高于试验Ⅲ组(P<0.05)。试验Ⅰ组羔羊的瘤胃内丙酸含量显著低于其他组(P<0.05),试验Ⅰ组的乙丙比显著高于其他组(P<0.05)。试验Ⅱ组血清免疫球蛋白G含量显著高于试验Ⅲ组(P<0.05),试验Ⅱ组血清中白细胞介素-6含量显著低于其他组(P<0.05)。研究表明,饲粮精粗比为55∶45时可以使秋季羔羊发育更健康,提高了饲料利用率和生长性能,增加了经济效益。The purpose of this experiment was to study the effects of diets with different concentrate-to-coarse ratios on the growth performance,rumen fermentation,nutrients apparent digestibility,and serum immune indexes of autumn lambs.Thirty 4-month-old F1 hybrid male lambs of'Dubo×Small Tail Han sheep'were randomly divided into three groups,with 10 replicates in each group and one sheep in each replicate.Experimental GroupⅠ,GroupⅡ,and GroupⅢwere fed with diets with the ratio of concentrate to coarse of 40∶60,55∶45,and 70∶30,respectively.The results showed that the average daily gain of lambs in GroupⅢwas significantly higher than that in GroupⅠ(P<0.05),and the feed to gain ratio of GroupⅡand GroupⅢwas significantly lower than that in GroupⅠ(P<0.05).The apparent digestibility of dry matter,organic matter,crude protein,and neutral detergent fiber in GroupⅠwas significantly lower than that in other groups(P<0.05),while the apparent digestibility of organic matter in GroupⅡwas significantly higher than that in GroupⅢ(P<0.05).The content of propionic acid in rumen of lambs in experimental groupⅠwas significantly lower than that in other groups(P<0.05),and the ratio of ethylene to propylene in experimental groupⅠwas significantly higher than that in other groups(P<0.05).The level of serum immunoglobulin G in GroupⅡwas significantly higher than that in GroupⅢ(P<0.05),and the level of serum interleukin-6 in GroupⅡwas significantly lower than that in other groups(P<0.05).The study indicates that when the concentrate-to-coarse ratio is 55∶45,the growth of lambs in autumn can be healthier,the utilization rate of feed can be improved,the growth performance of lambs can be improved,and the economic benefits can be increased.

关 键 词：不同精粗比 羔羊 生长性能 养分表观消化率 瘤胃发酵 免疫功能 

分 类 号：S826[农业科学—畜牧学]