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高寒牧区不同杂交组合羔羊生产性能比较

ISSN号：1000-6850
期刊名称：《中国农学通报》
时间：0
分类：S813.2[农业科学—畜牧学;农业科学—畜牧兽医]
作者机构：[1]甘肃农业大学草业学院/草业生态系统教育部重点实验室/甘肃省农业大学-新西兰梅西大学草地生物多样性研究中心,兰州730070
相关基金：农业部公益性行业项目“牧区生态高效草原牧养技术模式研究与示范”（No.201003061：No.201003019）;国家科技支撑计划项目“生物多样性保护与濒危物种保育技术研究及示范”（2012BAC01802-4）：草业生态系统重点实验室（甘肃农业大学）开放课题基金（CYZS-2011013）.

关键词：甘肃高山细毛羊, 藏羊, 杂交, 生产性能, Gansu alpine merino, Tibetan sheep, hybrid, production performance

中文摘要：

为提高高寒牧区甘肃高山细毛羊及藏羊的生产性能,引进父本欧拉型藏羊、邦德、甘肃高山细毛羊,分别与本地高山细毛羊及本地藏羊母本进行杂交试验。结果表明：欧拉型藏羊×本地藏羊组合羔羊初生重为4.63 kg,显著高于其他杂交组合;邦德与本地藏羊杂交羔羊的1-5月各月龄体重整体表现最好,且日增重达到0.19 kg/d,均显著高于其他杂交组合;各杂交组合间胸深、胸围、管围、尻宽以及尻长均无显著性差异（P〉0.05）;欧拉型藏羊×本地高山细毛羊组合的屠宰率最高,为46.29%,欧拉型藏羊×本地藏羊组合的眼肌面积和GR值均显著高于其他杂交组合;本地藏羊杂交组合的各内脏重高于本地高山细毛羊;欧拉型藏羊×本地藏羊组合羔羊的失水率、熟肉率以及嫩度均最高,分别为38.70%、64.40%、71.18N,本地藏羊纯繁的p H最高,为7.1;各杂交组合的肉色、大理石花纹以及膻味评定结果一致。

英文摘要：

In order to improve the production performance of lamb in alpine pastoral region, the trail introduced Ola Tibetan sheep, Bond, Gansu Alpine Merino as sire to cross the local alpine merino and the local Tibetan sheep. The result showed that the birth weight of Ola （ ♂ ）× Tibetan sheep （ ♀ ） was 4.63 kg, which was significantly higher than other crossbreed lambs （P〈0.05）; the body weight of Bond （ ♂ ）×Tibetan sheep （ ♀ ） from 1 to 5 months were higher than others, and the daily body weight gain （0.19kg/d） was significantly higher than others （P〈0.05）. There were no difference in the chest wide, chest girth, circumference of cannon bone, rump width and length among different hybridized lambs （P〉0.05）. The dressing percentage of Ola （ ♂ ）×local alpine merino （ 9 ） was 46.29%, the highest one in all crossbreeds. The loin eye area and GR value of Ola （ ♂ ）× local Tibetan sheep （ ♀ ） were higher than others, but did not reach significant difference （P〈0.05）. The viscera weight of crossbreed Tibetan sheep was higher than Gansu alpine merino. The ratio of holding water, cooked meat percentage, tenderness of Ola （ ♂ ）×loeal Tibetan sheep （ ♀ ） were 38.70%, 64.40%, 71.18 N, respectively, which were higher than others. The pH of the purebred local Tibetan lamb was 7.1, which was the highest value in crossbreed lambs. The assessment of meat color, marbled meats, mutton odor was same among different hybridized lambs. Considering production in practice, the crossbreed of Bond （ ♂ ）xlocal Tibetan sheep （ ♀ ）has potential value for the lamb production because of quick growth and the highest birth body weight.

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