不同添加形式的亚麻油对肉羊生长性能、屠宰性能及血清生化指标的影响

doi:10.16431/j.cnki.1671-7236.2018.02.016

摘要/Abstract

摘要：

本试验旨在研究日粮中添加不同形式的亚麻油对肉羊生长性能、屠宰性能及血液脂代谢相关生化指标的影响。选取体重相近的健康杜泊羊（♂）×小尾寒羊（♀）杂交F2代公羔24只，采用单因子完全随机试验设计，随机分为4组，每组6只。CON组为对照组，饲喂基础日粮；LO、L、LOM组为试验组，分别添加含油量4%的亚麻油、亚麻籽炒粒、亚麻油微胶囊脂末。试验期50 d。结果显示：①日粮添加亚麻籽、亚麻油微胶囊脂末能够提高羔羊的生长性能和屠宰性能，L、LOM组平均日增重（ADG）均显著高于LO组（P < 0.05）；②LOM组背膘厚显著高于CON组及L组（P < 0.05），但各组间其他屠宰性能指标差异均不显著（P > 0.05）；③不同形式的亚麻油均能够显著提高血清中总胆固醇（TC）、低密度脂蛋白胆固醇（LDL-C）、高密度脂蛋白胆固醇（HDL-C）含量（P < 0.05），显著降低LO及L组（INS）浓度（P < 0.05），血清中葡萄糖（GLU）、甘油三酯（TG）及瘦素（LEP）含量虽有上升趋势，但各组间差异不显著（P > 0.05）；④不同形式的亚麻油对瘤胃pH影响不显著（P > 0.05），但LOM组可显著提高瘤胃氨态氮（NH₃-N）浓度和微生物蛋白（MCP）含量（P < 0.05）。综上所述，亚麻油不同添加形式对血液脂代谢没有产生不良影响，可提高血清TC、LDL-C及HDL-C含量，降低INS的浓度；直接添加亚麻油将对肉羊生长有一定的负面影响，可降低ADG及MCP浓度；添加亚麻籽炒粒和亚麻油微胶囊脂末均可提高肉羊生产性能和瘤胃发酵功能，但添加微胶囊脂末效果更好。

关键词: 肉羊; 亚麻油; 微胶囊; 生长性能; 屠宰性能; 血清生化指标

Abstract:

The aim of this study was to investigate the effects of different forms of linseed oil supplementation on the growth performance,slaughter performance and serum biochemical indexes relevant to blood lipid metabolism of mutton sheep.Twenty-four F2 male lambs of heathy Dorper (♂)×Small-tailed Han sheep (♀) with similar body weight were allocated into four groups with six sheep per group according to the single-factor completely random design. The control (CON) group was fed with basal diet,the experimental group was fed with linseed oil (LO),linseed (L) and linseed oil microcapsule (LOM) with 4% oil as equivalent added in the diet,respectively.The results showed that:①The addition of linseed and linseed oil microcapsules could improve the growth performance and slaughter performance of sheep,and the ADG of L and LOM groups were significantly higher than LO group (P < 0.05);②The backfat thickness of LOM group was significantly higher than CON and L groups (P < 0.05),while there were no significant difference of the other slaughter performance indexes among groups (P > 0.05);③The TC and LDL-C and HDL-C were significantly higher in experimental groups than that of control group (P < 0.05),and the INS concentration of L and LO groups were significantly decreased (P < 0.05),different forms of linseed oil increased the content of TG,GLU and LEP in serum, while there were no significant differences among all groups (P > 0.05);The effect of different forms of linseed oil on rumen pH was not significant (P > 0.05), nevertheless LOM group could significantly increase rumen NH₃-N and MCP content (P < 0.05).In conclusion,different forms of linseed oil did not have a negative effect on blood lipid metabolism,adding linseed oil could increase serum TC,LDL-C and HDL-C, and reduce the INS concentration;Dietary direct addition of linseed oil would have a certain adverse effect on the production of sheep reducing the ADG and MCP concentration. Adding flaxseed and linseed oil microcapsules could improve the growth performance and rumen fermentation function of sheep,and the effects of the latter was better.

Key words: mutton sheep; linseed oil; microcapsule; growth performance; slaughter performance; serum biochemical indexes

中图分类号:

S816.7

张秋旭, 高爱琴, 史晓雪, 牛占宇, 李刚, 幸超, 朱玉霞, 张润厚. 不同添加形式的亚麻油对肉羊生长性能、屠宰性能及血清生化指标的影响[J]. 《中国畜牧兽医》, 2018, 45(2): 415-421.

ZHANG Qiuxu, GAO Aiqin, SHI Xiaoxue, NIU Zhanyu, LI Gang, XING Chao, ZHU Yuxia, ZHANG Runhou. Effect of Different Linseed Oil Forms Supplementation on Growth Performance, Slaughter Performance and Serum Biochemical Indexes of Mutton Sheep[J]. , 2018, 45(2): 415-421.

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