甘肃高山细毛羊不同杂交组合胴体分级和切块分割效果分析

发布时间：2018-02-21 10:29

本文关键词： 甘肃高山细毛羊杂交组合胴体分级胴体分割切块重量切块比例　出处：《中国农业科技导报》2016年06期 　论文类型：期刊论文

【摘要】：为了研究甘肃高山细毛羊肉用性能杂交改良效果,以澳洲美利奴、邦德、特克塞尔公羊与甘肃高山细毛羊母羊的杂种一代(分别简称澳甘细、邦甘细、特甘细)和甘肃高山细毛羊纯繁羊只(简称甘高细)作为试验对象,参照新西兰羔羊胴体分级标准,评价4个群体6月龄羔羊的胴体分级,建立胴体分割方法,观测切块重量和优质切块比例。胴体分级结果表明,邦甘细为PM级,特甘细和甘高细为PL级,澳甘细为A级。建立胴体分割方法,将左半胴体分割为一等肉(肩部、腰臀部、背腰最长肌)、二等肉(颈部、胸肋部、胸椎和腰椎、腹部)和三等肉(前小腿、后小腿)共9个部位。邦甘细所有切块部位的重量均最大,其颈部重量为0.364 kg,分别比澳甘细、特甘细和甘高细高0.103 kg、0.109 kg和0.078 kg(P0.01);肩部重量为1.575 kg,分别高0.814 kg、0.329 kg和0.583 kg(P0.01);腹部重量为0.523 kg,分别高0.300 kg、0.133 kg和0.203 kg(P0.01)。4个群体间的胸肋部比例、胸椎和腰椎比例无明显差异(P0.05),邦甘细的肩部比例和腹部比例最大,后小腿比例最小。邦甘细的肩部比例是23.04%,分别较澳甘细、特甘细和甘高细高3.25%、1.80%和3.17%;邦甘细的后小腿比例是5.22%,分别较上述群体低1.73%、0.32%和0.83%。邦甘细一等和二等肉比例为91.30%,高于澳甘细的88.40%、特甘细的91.03%和甘高细的90.39%。由此表明,邦德对甘肃高山细毛羊肉用性能的杂交改良效果最好,不但可以提高6月龄羔羊胴体的分级结果,还能提高胴体切块重量和优质切块比例。
[Abstract]:In order to study the effect of crossbreeding on meat performance of Gansu alpine fine wool sheep, the hybrids of Australian Merino, Bond, Texer Ram and Gansu Alpine Fine Wool Sheep were used. And Gansu alpine fine wool sheep (Ganggao fine sheep) were used as experimental objects. According to New Zealand lambs' carcass classification standard, the carcass classification of 6 months old lambs from four populations was evaluated, and a carcass segmentation method was established. The carcass classification results showed that Bang Gan was PM grade, super sweet and sweet fine was PL grade, Australian sweet fine was A grade. The carcass segmentation method was established, and the left half carcass was divided into first class meat (shoulder, waist and hip). The longest musculus dorsi, second class meat (neck, thoracic rib, thoracic vertebrae and lumbar vertebrae, abdomen) and third class meat (anterior lower leg, posterior calf) have nine parts. All cut parts of Bang gan have the largest weight, the neck weight is 0.364 kg, which is thinner than that of Australia. The weight of the shoulder was 1.575 kg, the weight of the shoulder was 0.814 kg / 0.329 kg and 0.583 kg / kg respectively, the abdominal weight was 0.523 kg, the weight of abdomen was 0.300 kg / kg 0.133 kg and 0.203 kg / kg P 0.01.The ratio of thoracic ribs of the 4 populations was 0.300 kg / 0.133 kg and 0.203 kg / kg P 0.01.The weight of the abdomen was 0.103 kg / 0.133 kg and 0.203 kg / kg P 0.01.The weight of the shoulder was 1.575 kg, respectively, and the weight of the abdomen was 0.523 kg. There was no significant difference in the ratio of thoracic vertebrae and lumbar vertebrae (P 0.05). The ratio of shoulder and abdomen was the largest, and the proportion of posterior calf was the smallest. The proportion of shoulders with fine stature was 23.04, which was smaller than that of Australia. The proportion of hind lower leg is 5.22, 1.730.32% and 0.830.32% lower than that of the above group, respectively. The ratio of the first grade and the second grade meat is 91.30, which is higher than that of Australia, 88.40,#number0# and 90.399.This shows that, Bond had the best effect on improving meat performance of Gansu alpine fine wool sheep. It could not only improve the carcass classification result of 6-month-old lamb, but also increase the weight of carcass and the ratio of high-quality cut.
【作者单位】：甘肃农业大学动物科学技术学院甘肃省草食动物生物技术重点实验室;甘肃农业大学研究测试中心;天祝藏族自治县松山镇畜牧站;
【基金】：甘肃省高校基本科研业务费项目甘肃省农业科技创新项目(1003001) 国际科技合作与交流项目(2011DFG33310)资助
【分类号】：S826

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