不同蛋白质水平饲粮对舍饲小尾寒羊公羔羊生长性能和肉品质的影响  

Effects of different protein levels of diets on growth performance and meat quality of barn feeding small tailed Han sheep male lambs

作　　者：范敬常 楚惠民 FAN Jing-chang;CHU Hui-min

机构地区：[1]嘉祥县种羊场,山东济宁272400 [2]济宁市农业科学研究院,山东济宁272100

出　　处：《饲料研究》2024年第13期16-20,共5页Feed Research

基　　金：山东省农业良种工程项目(项目编号:2021LZGC010-04);山东省羊产业技术体系项目(项目编号:SDAIT-10-12)。

摘　　要：试验为研究不同蛋白水平饲粮对舍饲小尾寒羊公羔羊生长性能和肉品质的影响,选择75只约90日龄的小尾寒羊公羔羊,随机分为试验Ⅰ组(低蛋白组,12.16%)、Ⅱ组(中蛋白组,14.04%)、Ⅲ组(高蛋白组,15.70%),每组5个重复,每个重复5只公羔羊。预试期10 d,正式试验期90 d。结果表明:试验Ⅱ组和试验Ⅲ组平均增重和平均日增重均极显著高于试验Ⅰ组(P<0.01),料重比显著低于试验Ⅰ组(P<0.05)。试验Ⅰ组的胴体重、背膘厚度显著低于试验Ⅱ组和试验Ⅲ组(P<0.05),蒸煮损失、滴水损失、亮度值和黄度值显著高于试验Ⅱ组和试验Ⅲ组(P<0.05)。试验Ⅱ组羔羊平均日收益2.47元/d,比试验Ⅰ组和试验Ⅲ组分别高0.74元/d和0.39元/d。研究表明,代谢能水平为11.52~11.57 MJ/kg时,提高饲粮蛋白质水平可以提高舍饲小尾寒羊公羔羊的生长性能,并对羊肉品质具有改善作用,以粗蛋白质水平为14.04%时经济效益最高。The experiment was to study the effects of different protein levels in the diet on the growth performance and meat quality of penned small tailed Han sheep lambs.A total of 75 male lambs of the small tailed Han sheep,approximately 90 days old,were randomly divided into three experimental groups:GroupⅠ(low protein group,12.16%),GroupⅡ(medium protein group,14.04%),and GroupⅢ(high protein group,15.70%),with five replicates per group and five male lambs per replicate.The preliminary trial lasted for 10 days,and the formal experiment lasted for 90 days.The results showed that the average weight gain and average daily weight gain of GroupⅡand GroupⅢwere extremely higher than those of GroupⅠ(P<0.01),and the feed to gain ratio was significantly lower than that of GroupⅠ(P<0.05).The carcass weight and backfat thickness of GroupⅠwere significantly lower than those of GroupⅡand GroupⅢ(P<0.05),while the cooking loss,drip loss,brightness value,and yellowness value were significantly higher than those of GroupⅡand GroupⅢ(P<0.05).The average daily income of the lambs in GroupⅡwas 2.47 yuan/d,which was 0.74 yuan/d higher than that of GroupⅠand 0.39 yuan/d higher than that of GroupⅢ.The study indicates that when the metabolizable energy level is between 11.52 and 11.57 MJ/kg,increasing the dietary protein level can improve the growth performance of barn feeding small tailed Han sheep and has a positive effect on the meat quality,with the highest economic benefit achieved at a crude protein level of 14.04%.

关 键 词：蛋白质 小尾寒羊 生长性能 肉品质 经济效益 

分 类 号：S826[农业科学—畜牧学]