动物营养学报 >

2020 , Vol. 32 >Issue 3: 1247 - 1255

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.03.032

反刍与草食动物营养与饲料 RUMINANT AND HERBIVORE NUTRITION AND FEED

低蛋白质饲粮补充过瘤胃氨基酸对育肥阶段杜寒杂交肉羊生长性能和屠宰性能的影响

  • 郭伟 ,
  • 王文义 ,
  • 杨东 ,
  • 崔凯 ,
  • 张娟 ,
  • 刘敏 ,
  • 李东茂 ,
  • 呼秀智 ,
  • 刁其玉
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  • 1. 河北工程大学生命科学与食品工程学院, 邯郸 056038;
    2. 中国农业科学院饲料研究所, 农业农村部饲料生物技术重点实验室, 北京 100081;
    3. 巴彦淖尔市农牧业科学研究院, 巴彦淖尔 015000
郭伟(1991-),男,河北邢台人,硕士研究生,从事动物营养与饲料科学研究。E-mail:longhuaguowei@163.com

收稿日期: 2019-09-05

  网络出版日期: 2020-03-13

基金资助

国家肉羊产业技术体系（CARS-39）；国家自然科学青年科学基金项目（31802088）；现代农业产业技术体系建设专项资金（CARS-38）；内蒙古自治区科技重大专项

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Effects of Supplementation of Rumen Protected Amino Acids in Low Protein Diets on Growth Performance and Slaughter Performance of Dorper×Thin-Tailed Han Crossbred Mutton Sheep during Fattening Stage

  • GUO Wei ,
  • WANG Wenyi ,
  • YANG Dong ,
  • CUI Kai ,
  • ZHANG Juan ,
  • LIU Min ,
  • LI Dongmao ,
  • HU Xiuzhi ,
  • DIAO Qiyu
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  • 1. Hebei University of Engineering, College of Life Sciences and Food Engineering, Handan 056038, China;
    2. Feed Research Institute of Chinese Academy of Agricultural Sciences, Key Laboratory of Feed Biotechnology of the Ministry of Agriculture and Rural Affairs, Beijing 100081, China;
    3. Scientific Research Institute of Agricultural and Animal Husbandry in Bayannaoer, Bayannaoer 015000, China

Received date: 2019-09-05

  Online published: 2020-03-13

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摘要

本试验旨在研究低蛋白质饲粮补充过瘤胃氨基酸对育肥阶段杜寒杂交肉羊生长性能和屠宰性能的影响。选取平均体重为33 kg的杜寒杂交肉用母羊150只，随机分为5组（每组3个重复，每个重复10只羊），分别为对照组[饲喂基础饲粮，粗蛋白质（CP）水平为16%]、LP14组（饲粮CP水平为14%）、LP12组（饲粮CP水平为12%）、LP10组（饲粮CP水平为10%）、LP12+NPN组[饲粮CP水平为12%，尿素水平为1%]。试验组饲粮分别补充过瘤胃赖氨酸、蛋氨酸、苏氨酸、精氨酸，使其达到对照组饲粮中的对应的氨基酸水平。试验预试期10 d，正试期80 d。结果表明：1）与对照组相比，低蛋白质饲粮补充过瘤胃氨基酸对各组肉羊平均日增重、饲料转化率无显著影响（P>0.05）。2）与对照组相比，各试验组肉羊的屠宰性能指标如宰前活重、胴体重、屠宰率、GR值和眼肌面积均无显著差异（P>0.05）。3）各组肉羊的器官指数均与体重有关，组间差异不显著（P>0.05）。4）LP10组肉羊的瓣胃重量及其占宰前活重的比例显著高于LP12组和LP12+NPN组（P<0.05），LP10组大肠重量及其占宰前活重比例显著高于对照组、LP14组和LP12+NPN组（P<0.05）；饲粮蛋白质水平对网胃、皱胃、小肠重量及占比无显著影响（P>0.05）。结果显示，与对照组相比，饲粮蛋白质水平降低1~4个百分点并补充过瘤胃赖氨酸、蛋氨酸、苏氨酸、精氨酸和尿素，杜寒杂交肉羊的生长性能、屠宰性能均没有受到显著影响，说明低蛋白质饲粮补充过瘤胃氨基酸在肉羊育肥阶段是可行的。

关键词： 肉羊; 低蛋白质饲粮; 过瘤胃氨基酸; 氨基酸平衡模式; 生长性能; 屠宰性能

本文引用格式

郭伟 , 王文义 , 杨东 , 崔凯 , 张娟 , 刘敏 , 李东茂 , 呼秀智 , 刁其玉 . 低蛋白质饲粮补充过瘤胃氨基酸对育肥阶段杜寒杂交肉羊生长性能和屠宰性能的影响[J]. 动物营养学报, 2020 , 32(3) : 1247 -1255 . DOI: 10.3969/j.issn.1006-267x.2020.03.032

Abstract

The aim of this study was to investigate effects of supplementation of rumen protected amino acids in low protein diets on growth performance and slaughter performance of Dorper×thin-tailed Han crossbred mutton sheep during fattening stage. The one hundred and fifty Dorper×thin-tailed Han crossbred mutton sheep (weight about 33 kg) were divided into 5 groups (3 replicates per group, 10 mutton sheep per replicate). The groups were as follows:control group (dietary crude protein level was 16%), LP14 group (dietary crude protein level was 14%), LP12 group (dietary crude protein level was 12%), LP10 group (dietary crude protein level was 10%) and LP12+NPN group (dietary crude protein level was 12%, urea level was 1%). The supplementation of rumen protected lysine, methionine, threonine and arginine reached the corresponding amino acid levels in the control group diet. The adjustment period lasted for 10 days and the experiment period lasted for 80 days. The results showed as follows:1) compared with the control group, different levels of low protein diets supplemented with rumen protected amino acids had no significant effects on average daily gain and feed conversion ratio among groups (P>0.05). 2) There were no significant differences in the slaughter performance indicators of the mutton sheep in each test group, such as pre-slaughter live weight, carcass weight, slaughter rate, GR value and loin eye muscle are (P>0.05). 3) The organ indexes of mutton sheep in each group was related to body weight, and the difference among groups was not significant (P>0.05). 4) The omasum weight and the proportion of live weight before slaughter in LP10 group were significantly higher than those in LP12 and LP12+NPN group (P<0.05), large intestine weight and the proportion of live weight before slaughter in LP10 group were significantly higher than those in control group, LP14 group和LP12+NPN group (P<0.05); protein level of diets had no significant effect on reticulum, rumen, small intestine weight and the proportion (P>0.05). The results show that compared with the control group, when the protein level of the diets decreases by 1 to 4 percentage points and adding rumen protected lysine, methionine, threonine, arginine and urea, the growth performance, slaughter performance of Dorper×thin-tailed Han crossbred mutton sheep do not significantly be affected. Low protein diets supplemented with amino acids is feasible in the fattening stage of mutton sheep.

Key words： mutton sheep; low protein diet; rumen protected amino acid; amino acid balance pattern; growth performance; slaughter performance

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