棉副产品全混合发酵饲料对育肥羔羊屠宰性能、肉品质及毛利润的影响  

Effects of cotton by-product full mixed fermentation feed on slaughter performance,meat quality,and gross profit of fattening lambs

作　　者：邓沭洋 杨成 朱振宇 俄广旭 王明根 王继姝 卢冬 郭雪峰[1,2] DENG Shu-yang;YANG Cheng;ZHU Zhen-yu;E Guang-xu;WANG Ming-gen;WANG JI-shu;LU Dong;GUO Xue-feng

机构地区：[1]塔里木大学动物科学与技术学院,新疆阿拉尔843300 [2]塔里木畜牧科技兵团重点实验室,新疆阿拉尔843300

出　　处：《饲料研究》2024年第5期1-6,共6页Feed Research

基　　金：塔里木大学校长基金重大项目培育专项(项目编号:TDZKZD202204);国家自然科学基金(项目编号:32260845)。

摘　　要：试验旨在探究饲喂不同比例棉副产品全混合发酵饲料对育肥羔羊屠宰性能、肉品质及毛利润的影响。试验选取36只健康、2~3月龄、体重(26.0±2.2) kg的卡拉库尔羊,随机分为3组,每组3个重复,每个重复4只羊。对照组饲喂100%的棉副产品全价饲料,50%组饲喂50%棉副产品全混合发酵饲料+50%棉副产品全价饲料,80%组饲喂80%棉副产品全混合发酵饲料+20%棉副产品全价饲料。预试期15 d,正式试验期60 d。结果显示,与对照组相比,50%组和80%组羔羊的胴体重、净肉重、胴体净肉率、屠宰率显著升高(P<0.05),眼肌面积显著增加(P<0.05);50%组和80%组羔羊的瘤胃、小肠和大肠的重量显著增加(P<0.05),但其瘤胃指数、小肠指数、大肠指数无显著差异(P>0.05);50%组和80%组羔羊背最长肌的pH_(24 h)值、亮度值(L^(*))、红度值(a^(*))和肌内脂肪含量显著高于对照组(P<0.05),滴水损失、蒸煮损失和剪切力显著低于对照组(P<0.05);与对照组相比,50%组和80%组的毛利润分别提高1.81%和25.00%。研究表明,饲喂50%和80%棉副产品全混合发酵饲料能够提高育肥羔羊的屠宰性能,促进瘤胃、小肠和大肠的发育,改善肉品质,提高毛利润。The purpose of the study was to investigate the effects of feeding different proportions of cotton by-product full mixed fermentation feed on the slaughter performance,meat quality,and gross profit of fattening lambs.In the experiment,36 healthy,2~3 month old Karakul sheep with a weight of(26.0±2.2) kg were randomly divided into three groups,with three replicates per group and four sheep per replicate.The control group was fed with 100% cotton by-product full feed,the 50% group was fed with 50% cotton by-product full mixed fermentation feed + 50% cotton by-product full feed,and the 80% group was fed with 80% cotton by-product full mixed fermentation feed + 20% cotton by-product full feed.The pre-test period was 15 days and the formal test period was 60 days.The results showed that compared with the control group,the carcass weight,net meat weight,carcass net meat rate,and slaughter rate of the lambs in the 50% and 80% groups were significantly increased(P<0.05),the eye muscle area was significantly increased(P<0.05),and the weight of the rumen,small intestine and large intestine of the lambs in the 50% group and 80% group was significantly increased(P<0.05),but there was no significant difference in rumen index,small intestine index,and large intestine index(P>0.05).The pH_(24 h) value,brightness value(L~*),redness value(a~*),and intramuscular fat content of the longissimus dorsi muscle of the 50% group and 80% group were significantly higher than those of the control group(P<0.05),and the drip loss,cooking loss,and shear force were significantly lower than those of the control group(P<0.05).Compared with the control group,the gross profit of the 50% group and 80% group increased by 1.81% and 25.00%,respectively.The result shows that feeding 50% and 80% cotton by-product full mixed fermentation feed can improve the slaughter performance of fattening lambs,promote the development of rumen,small intestine,and large intestine,improve the meat quality and increase the gross profit.

关 键 词：棉副产品全混合发酵饲料 育肥羔羊 屠宰性能 肉品质 毛利润 

分 类 号：S826[农业科学—畜牧学]