断尾对兰州大尾羊生长性能、脂肪沉积分布和屠宰性能的影响  

The Effect of Tail Docking on Growth Performance,Fat Deposition Distribution and Slaughter Performance in Lanzhou Fat-tailed Sheep

作　　者：宋淑珍[1] 刘俊斌 朱才业[2] 徐红伟[3] 刘立山 孔艳龙 SONG Shuzhen;LIU Junbin;ZHU Caiye;XU Hongwei;LIU Lishan;KONG Yanlong(Institute of Animal&Pasture Science and Green Agriculture,Gansu Academy of Agricultural Sciences,Lanzhou 730070,China;College of Animal Science and Technology,Gansu Agricultural University,Lanzhou 730070,China;Life Science and Engineering College,Northwest Minzu University,Lanzhou 730030,China;Yongjing Ruilin Technology and Science Co.Ltd.,Yongjing 731603,China)

机构地区：[1]甘肃省农业科学院畜草与绿色农业研究所,兰州730070 [2]甘肃农业大学动物科学技术学院,兰州730070 [3]西北民族大学生命科学与工程学院,兰州730030 [4]永靖县瑞霖科技养殖有限公司,永靖731603

出　　处：《畜牧兽医学报》2023年第2期642-655,共14页ACTA VETERINARIA ET ZOOTECHNICA SINICA

基　　金：国家自然科学基金(31960673;32060748)。

摘　　要：旨在观察断尾对兰州大尾羊生长性能、屠宰性能、脂肪沉积分布以及血清脂肪因子的影响,为通过脂肪沉积部位干预提高脂尾型绵羊生产效益提供参考。选择血缘清楚、体重接近的5日龄健康兰州大尾羊羔羊18只,随机分为对照组(C组)和试验组(T组),每组9只羔羊,试验组羔羊采用橡皮圈结扎法断尾。试验期间两组羊日粮相同,均饲喂全价配合饲料(精粗比为70∶30),自由饮水。试验期240 d。结果表明:1)兰州大尾羊羔羊断尾后的30 d内,断尾组羔羊日增重显著低于对照组(P<0.05);31~240 d各阶段两组试验羊日增重无显著差异(P>0.05)。2)断尾组羊的体重在断尾后的前3个阶段(断尾90 d内)显著低于对照组(P<0.05),随后各阶段两组试验羊的体重无显著差异(P>0.05);料重比在断尾后的61~90 d内,显著小于对照组(P<0.05),其余阶段和整个试验期差异不显著(P>0.05)。3)断尾后0~60 d内兰州大尾羊血清TNF-α较对照组显著升高(P<0.05),61~240 d断尾组羊血清中TNF-α浓度数值上一直高于对照组,但差异不显著(P>0.05);断尾组羊血清GLU、LEP、RETN、ADPN在数值上大于对照组羊,并且随着试验期的增加,两组之间的差异增大,但差异不显著(P>0.05);两组血清TG、IL-6和NEFA在整个试验期差异不显著(P>0.05)。4)断尾组尾部脂肪指数、总脂肪指数与对照组相比,显著降低(P<0.05),皮下脂肪指数、肾周脂肪指数、腹部脂肪指数和内脏脂肪指数显著升高(P<0.05),心脏脂肪指数、大网膜脂肪指数和肠系膜脂肪指数两组间无显著差异(P>0.05);与对照组相比,断尾组羊的尾长指数、尾中宽指数、尾周长指数和尾重指数显著降低(P<0.05)。5)断尾组羊屠宰率显著大于对照组(P<0.05),背膘厚、GR值和眼肌面积在数值上增大,但组间差异不显著(P>0.05);断尾组羊背最长肌肉色(亮度、红度、黄度)和pH与对照组无显著差异(P>0.05),剪切力显著小于对照组(P<0.05),The objective of this study was to observe the effects of tail docking on the growth performance, slaughter performance, fat deposition distribution and serum adipokines in Lanzhou fat-tailed sheep. The results were expected to provide reference for improving the production of fat-tailed sheep by fat deposition intervention. Eighteen 5 days old healthy Lanzhou fat-tailed lambs with clear genealogy and uniform weight were randomly divided into control group(C group) and test group(T group), 9 lambs each group, the tail from T group lambs were ligated with rubber band. The two groups were fed with the same diet in the trial period, with the feed concentrate-roughage ratio of 70∶30, and the animals had free access to the water. The trial lasted for 240 days. The results were showed as follows: 1) Average daily gain of tail docking sheep was significantly lower than that in C group(P<0.05) in the first 30 days. There was no significant difference in average daily gain between the two groups during 31~240 d(P>0.05). 2) The body weight of tail docking sheep was significantly lower than that in C group in the first three stages(0~90 d)(P<0.05), but there was no significant difference between the two groups in other stages(P>0.05). The feed to gain ratio in tail docking group was significantly lower than that in C group(P<0.05) during 61~90 d, and there was no significant difference between the other stages(P>0.05). 3) Serum TNF-α in the tail docking group was significantly higher than that of the control group(P<0.05) during 0~60 d, and was numerically higher during 61~240 d(P>0.05). Serum GLU, LEP, RETN and ADPN in the tail-docking group were higher, and the difference between two group increased with the extension of test period, but the difference was not significant(P>0.05). Serum TG, IL-6 and NEFA were not significantly different in the trial period(P>0.05). 4) The tail fat and total fat index in tail docking group were significantly lower(P<0.05). The subcutaneous fat, kidney fat, abdominal fat and visceral fat

关 键 词：断尾 血清脂肪因子 脂肪沉积 屠宰性能 肉品质 

分 类 号：S826.622[农业科学—畜牧学]