饲用油菜混合青贮对湖羊屠宰性能及肉品质的影响

doi:10.16431/j.cnki.1671-7236.2018.06.018

摘要/Abstract

摘要：

本试验旨在研究饲用油菜与其他粗饲料混合青贮对湖羊屠宰性能和肉品质的影响。选取200只湖羊公羔（3月龄）随机等分为两组，分别饲喂玉米青贮全混合日粮（对照组）和油菜混合青贮日粮（试验组），试验期90 d。试验结束时每组随机挑选10只湖羊屠宰，测定其屠宰性能和肉品质。结果显示，与对照组相比，试验组湖羊胴体重、背膘厚和眼肌面积等屠宰性能无显著变化（P>0.05）；肝脏重极显著增高（P<0.01），肾脏重显著增高（P<0.05）；宰后45 min、24 h背最长肌的红度值（a_{45 min}_{24 h}^*）极显著降低（P<0.01）；背最长肌中山嵛酸（C22：0）含量显著增高（P<0.05），花生四烯酸（C20：4n6）、二十二碳六烯酸（C22：6n3）及n-6多不饱和脂肪酸含量显著降低（P<0.05）；其他肉质性状指标及脂肪酸组成均无显著差异（P>0.05）。以上结果表明，以饲用油菜混合青贮为粗饲料饲喂湖羊，可以达到与传统全株玉米青贮相近的效果，对湖羊的屠宰性能和肉品质没有不利影响，为饲用油菜在养羊业上的应用提供了理论依据。

关键词: 饲用油菜; 湖羊; 屠宰性能; 肉品质

Abstract:

The experiment was conducted to study the effects of forage canola on the slaughter performance and meat quality of Hu lambs.Two hundred 3-month-old Hu male lambs were equally and randomly divided into two groups.One group was fed on corn silage total mixed ration (control group),and the other was fed with forage canola silage total mixed ration (experimental group).A slaughter experiment was carried out to test the slaughter performance and meat quality after 90 days feeding.The results showed that,compared with the control group,the carcass weight,rib fat depth and loin eye area of lambs in the experimental group had no significant (P>0.05),and they showed a significantly higher liver (P<0.01) and kidney weight(P<0.05).For meat quality,a_{45 min}^* and a_24h^* value decreased extremely significantly (P<0.01),the level of behenic acid (C22:0) increased significantly (P<0.05),while the levels of arachidonic acid (C20:4n6),docosahexenoic acid (C22:6n3) and n-6 polyunsaturated fatty acids decreased significantly (P<0.05).The other indexes of meat quality and fatty acid composition had no significant change (P>0.05).In summary,feeding growing Hu lambs with forage canola silage total mixed ration had no seriously adverse effects on slaughter performance and meat quality,had a similar effect with corn silage,which provided a theoretical basis for the utilization of forage canola.

Key words: forage canola; slaughter performance; meat quality; Hu sheep

中图分类号:

S816.5⁺3

刁志成, 曲扬华, 刘策, 高月锋, 罗海玲. 饲用油菜混合青贮对湖羊屠宰性能及肉品质的影响[J]. 《中国畜牧兽医》, 2018, 45(6): 1564-1570.

DIAO Zhicheng, QU Yanghua, LIU Ce, GAO Yuefeng, LUO Hailing. Effects of Forage Canola Mixed Silage on Slaughter Performance and Meat Quality in Hu Sheep[J]. , 2018, 45(6): 1564-1570.

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