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中国农学通报

中国农学通报 ›› 2015, Vol. 31 ›› Issue (5): 7-11.doi: 10.11924/j.issn.1000-6850.casb14100072

所属专题： 畜牧兽医

• 畜牧 动物医学 蚕 蜂 • 上一篇    下一篇

脂尾去除对兰州大尾羊和蒙古羊生长性能及脂肪沉积分布的影响

刘政,赵生国,李华伟,岳燕,程箫,刘立山,周瑞,刘丽,吴建平   

  1. 甘肃农业大学动物科学技术学院,甘肃农业大学动物科学技术学院,甘肃农业大学动物科学技术学院,甘肃农业大学动物科学技术学院,甘肃农业大学动物科学技术学院,甘肃农业大学动物科学技术学院,甘肃农业大学动物科学技术学院,甘肃农业大学动物科学技术学院,甘肃农业大学动物科学技术学院
  • 收稿日期:2014-10-20 修回日期:2014-12-01 接受日期:2014-12-01 出版日期:2015-03-20 发布日期:2015-03-20
  • 通讯作者: 吴建平
  • 基金资助:
    国家绒毛用羊产业技术体系项目“不同环境下的圈舍设计、关键技术配套和草畜平衡关键点评价与优化研究”(CARS-40-09B)；地区科学基金项目“天然草原牧草代谢能极端变化时绵羊（Aries ovis）脂肪代谢与沉积的胁迫性响应机理研究”（31460592）。

Impact on growth performance and fat deposition distribution of Lanzhou Fat-tailed sheep and Mongolian sheep with fat-tail removal

  • Received:2014-10-20 Revised:2014-12-01 Accepted:2014-12-01 Online:2015-03-20 Published:2015-03-20

摘要： 为了研究脂尾去除对‘兰州大尾羊’和‘蒙古羊’生长性状及脂肪沉积分布的影响，选取发育正常、年龄、体重基本一致的兰州大尾羊和蒙古羊各18只，各随机选取9只进行断尾，‘兰州大尾羊’采用外科手术法，‘蒙古羊’采用橡圈结扎法。断尾羊为试验组，未断尾羊为对照组。屠宰后的结果显示：‘兰州大尾羊’和‘蒙古羊’试验组的采食量均低于对照组，而日增重、宰前活重和热胴体重则均是试验组比对照组高，但差异均不显著(P>0.05)。‘兰州大尾羊’对照组的尾臀部脂肪重和总脂肪重明显高于试验组，尾臀部脂肪重差异极显著(P<0.01)，总脂肪重差异显著(P<0.05)。‘兰州大尾羊’其余各部位脂肪重均是对照组低于试验组。其中，皮下脂肪重和肾周脂肪重差异不显著(P>0.05)；睾丸脂肪重、肠胃脂肪重和内部脂肪重呈现显著性差异(P<0.05)。‘蒙古羊’对照组的尾臀部脂肪重高于试验组，且差异性极显著(P<0.01)。皮下脂肪重、睾丸脂肪重、肾周脂肪重、肠胃脂肪重、内部脂肪重和总脂肪重在‘蒙古羊’的试验组和对照组之间没有显著性差异(P>0.05)。由分析可知，脂尾去除有提高兰州大尾羊和蒙古羊日增重及降低二者采食量的趋势; 脂尾去除对蒙古羊脂肪沉积分布影响不大，而对兰州大尾羊则更多的脂肪沉积到了皮下、睾丸、肾周和肠胃周围，断尾羊总脂肪重显著降低。

关键词: 产肉性能, 产肉性能

Abstract: In order to study growth performance and fat deposition distribution of fat-tail sheep with no tail, the impact on the growth performance and fat deposition distribution of ‘Lanzhou fat-tailed sheep’ and ‘Mongolian sheep’ with fat-tail removal was studied. 18 ‘Lanzhou fat-tailed sheep’ and 18 ‘Mongolian sheep’ which were healthy, at the same age and had almost the same weight were collected in the test. Nine ‘Lanzhou fat-tailed sheep’ and nine ‘Mongolian sheep’ were randomly selected to remove their fat-tail by different methods. ‘Lanzhou fat-tailed sheep’ used surgical method, and ‘Mongolian sheep’ used rubber ring ligation method. No tail sheep formed the treatment group and tail sheep made up the control group of each breed. The results showed that feed intake of each breed in treatment group was lesser than control group after slaughtered, while the average daily gain, live weight before slaughter and hot carcass weight in treatment group was greater than that of control group, but the difference was not significant(P>0.05). There was a highly significant difference in tail and rump fat weight of ‘Lanzhou fat-tailed sheep’ between control group and treatment group(P<0.01), and control group was highly greater than treatment group. The total body fat weight of ‘Lanzhou fat-tailed sheep’ in control group was also significantly greater than treatment group(P<0.05). The remaining parts of the fat weight of ‘Lanzhou fat-tailed sheep’ in control group were lesser than treatment group. Among them, there was no significant difference of the subcutaneous fat weight and perinephric fat weight between each group(P>0.05). The testicular fat weight, omental and mesenteric fat weight and internal fat weight showed significant difference between the two groups(P<0.05). There was also a highly significant difference in tail and rump fat weight of ‘Mongolian sheep’ between control group and treatment group(P<0.01), and control group was highly greater than treatment group. The subcutaneous fat weight, testicular fat weight, perinephric fat weight, omental and mesenteric fat weight, internal fat weight and total body fat weight of ‘Mongolian sheep’ showed no significant differences of the two groups(P>0.05). There was a trend in improving the average daily gain and decreasing feed intake of ‘Lanzhou fat-tailed sheep’ and ‘Mongolia sheep’ with tail removal. There was a little influence on fat deposition distribution with removing fat-tail of ‘Mongolian sheep’, while the fat are more deposited into the skin, testis, kidney and stomach and intestines with removing fat-tail of ‘Lanzhou fat-tailed sheep’. What’s more, the total body fat weight of ‘Lanzhou fat-tailed’ sheep was significantly declined.