动物营养学报 >

2015 , Vol. 27 >Issue 4: 1117 - 1123

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.04.015

反刍动物营养 Ruminant Nutrition

过瘤胃保护胆碱对肉羊生长、消化、血清指标及肉品质的影响

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  • 扬州大学动物科学与技术学院, 扬州 225009
李华伟(1980-),男,河南新乡人,博士,从事反刍动物营养与饲料研究。E-mail:lihuawei4646@sina.com

收稿日期: 2014-11-05

  网络出版日期: 2015-04-21

基金资助

公益性行业(农业)科研专项(201303144);江苏省高校优势学科;江苏省高校研究生科技创新计划项目(CXZZ13_0910);江苏省科技支撑计划(BE 2013393);苏北科技专项资金(BN2014004)

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Effects of Rumen Protected Choline on Growth, Digestion, Serum Indices and Meat Quality of Lambs

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  • College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China

Received date: 2014-11-05

  Online published: 2015-04-21

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摘要

本试验旨在研究过瘤胃保护胆碱(rumen protected choline,RPC)对肉羊生长、消化、血清指标以及肉品质的影响。选用24只杜湖杂交1代公羔,根据体重相近原则随机分成对照组、试验Ⅰ、Ⅱ和Ⅲ组(基础饲粮中分别添加0、0.25%、0.50%、0.75% RPC)。预试期15 d,正试期60 d。结果表明:添加RPC对肉羊的干物质采食量无显著影响(P>0.05),显著或极显著提高了干物质、有机物和酸性洗涤纤维的表观消化率(P<0.05或P<0.01)。与对照组相比,试验Ⅰ组显著或极显著提高了平均净增重(ANG)和平均日增重(ADG)(P<0.05或P<0.01),显著降低了料重比(F/G)和血清尿素氮含量(P<0.05),但是血清总蛋白(TP)、肌酐(Cr)含量和肌酸激酶(CK)活性都没呈现显著差异(P>0.05)。各试验组间屠宰率差异不显著(P>0.05),试验Ⅰ组较对照组减缓了羊肉宰后12 h的pH下降速度,极显著降低了剪切力(P<0.01)。本试验中,在0.25%添加水平下,RPC有降低料重比,提高养分消化率,改善氮利用效率和羊肉品质的效果。

关键词： 过瘤保护胃胆碱; 肉羊; 生长性能; 肉品质

本文引用格式

李华伟, 王洪荣, 王梦芝, 喻礼怀, 孙丽莎, 陈青, 赵睿, 崔慧慧 . 过瘤胃保护胆碱对肉羊生长、消化、血清指标及肉品质的影响[J]. 动物营养学报, 2015 , 27(4) : 1117 -1123 . DOI: 10.3969/j.issn.1006-267x.2015.04.015

Abstract

The aim of this research was to study the effects of rumen protected choline (RPC) on growth, digestion, serum indices and meat quality of lambs. Twenty four Doper×Hu F1 male lambs were randomly divided into control group, group Ⅰ, group Ⅱ and group Ⅲ (RPC level in diets was 0, 0.25%, 0.50% and 0.75%, respectively) according to similar body weight. The experiment had a 15-day pre-experiment and a 60-day experiment. The results showed that dry matter intake was not affected by RPC (P>0.05), and RPC significantly improved apparent digestibility of dry matter, crude protein, organic matter, neutral detergent fiber and acid detergent fiber (P<0.05 or P<0.01). Compare with control group, average net gain and average daily gain in group Ⅰ were significantly improved (P < 0.05 or P<0.01), and feed to gain ratio and serum urea nitrogen content in group Ⅰ were significantly decreased (P < 0.05), while there were no significant differences in serum total protein, creatinine contents and creatine kinase activity (P > 0.05). The dressing percentage has no significant difference among groups, but group Ⅰ had significant lower shear force of meat (P<0.01), and slowed down meat pH decrease rate at 12 h post-slaughter. It is concluded that the supplementation of RPC at 0.25% can decrease feed to gain ratio, improve nutrient digestibility, nitrogen utilization and meat quality.

Key words： rumen protected choline; lamb; growth performance; meat quality

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