摘要
为了研究3种粗饲料来源不同的颗粒型全混合日粮对舍饲湖羊羔羊生长性能、屠宰性能、肉品质以及瘤胃组织形态的影响,本试验选取30只80日龄左右断奶湖羊公羔为研究对象,随机分为3组,每组10只,分别饲喂3种粗饲料原料为玉米(Zea mays)秸秆青贮、大麦(Hordeum vulgare)草、苜蓿(Medicago sativa)干草的颗粒型全混合饲料,分别记为A组、B组、C组,并进行为期60 d的育肥试验。结果表明:A组平均日增重和末重显著高于B组(P<0.05),C组平均日增重和末重与A组和B组无显著差异(P>0.05);A组的眼肌面积大于B组和C组(P>0.05),而胴体脂肪含量值小于B组和C组(P>0.05);C组显著提高了肌肉嫩度(P<0.05),降低了失水率(P<0.05);A组和B组瘤胃组织乳头长度显著大于C组(P<0.05),A组瘤胃乳头宽度显著大于B组和C组(P<0.05),B组肌层厚度和角化层厚度显著大于A组和C组(P<0.05);育肥经济效益分析显示,A组全混合日粮育肥效果最佳。本研究结果可为集约化、规模化肉羊养殖中颗粒型全混合日粮的推广应用提供参考依据。
We studied the effects of pelleted total mixed rations containing three different roughage types on the production performance,slaughter performance,meat quality,and rumen tissue morphology of stall-fed Hu sheep.Thirty 80-day-old weaned Hu sheep were selected as the test subjects.The sheep were randomly divided into three groups(10 in each group),and a 60-day fattening test was carried out,during which they were fed pelleted total mixed rations containing one of three types of coarse feed ingredient:corn straw silage(group A),barley grass(group B),or alfalfa hay(group C).The average daily weight gain and final weight of group B were significantly lower than those of group A(P<0.05),while the average daily weight gain and final weight of group C were not significantly different from those of groups A and B(P>0.05).In group A,eye muscle area was larger than in groups B and C(P>0.05),and grade rule value was lower(P>0.05).In group C,muscle tenderness was significantly greater than in the other groups(P<0.05),and water loss rate was reduced(P<0.05).Rumen papilla length was significantly greater in groups A and B than in group C(P<0.05),while rumen papilla width in group A was significantly greater than in groups B and C(P<0.05).The muscular and keratinized layers of the rumen were significantly thicker in group B than in groups A and C(P<0.05).Overall,the total mixed rations containing corn straw silage(group A)provided the most economic benefits.These results can serve as a guide for the use of wholegrain total mixed rations in intensive and large-scale sheep rearing.
作者
刘宁波
赵亥山
郭磊
王霞
李讨讨
马友记
LIU Ningbo;ZHAO Haishan;GUO Lei;WANG Xia;LI Taotao;MA Youji(College of Animal Science&Technology,Gansu Agricultural University,Lanzhou 730070,Gansu,China;Gansu Engineering Laboratory of Sheep Breeding Biotechnology,Minqin 733300,Gansu,China;Lintao Pingchang Modern Agriculture and Animal Husbandry Technology Co.Ltd.,Lintao 730500,Gansu,China;Yongchang Animal Husbandry and Veterinary Technical Service Center,Yongchang 737200,Gansu,China)
出处
《草业科学》
CAS
CSCD
2020年第12期2550-2557,共8页
Pratacultural Science
基金
国家重点研发计划课题(2018YFD0502100)
甘肃省现代草食畜产业技术体系项目(GARS-08)。
关键词
湖羊
粗饲料
颗粒型全混合日粮
屠宰性能
肉品质
瘤胃发育
生产性能
Hu sheep
roughage
pelleted total mixed rations
slaughter performance
meat quality
rumen development
production performance
