摘要
本试验旨在探讨氮氨甲酰谷氨酸(NCG)与胍基乙酸(GAA)组合对舍饲滩羊生长性能、胴体品质和肉质的影响。试验选取平均体重为(22.52±0.85)kg的健康去势滩羔羊48只,按完全随机区组设计分为对照组与试验组,每组6个重复,每个重复4只羔羊。对照组饲喂基础饲粮,试验组饲喂在基础饲粮中添加0.10%NCG+0.08%GAA的试验饲粮,试验期80 d,试验结束后进行屠宰,测定胴体品质及肉品质。结果表明:与对照组相比,1)试验组滩羊平均日增重和饲料转化效率显著提高(P<0.05);2)试验组滩羊屠宰率和净肉率显著提高(P<0.05);3)试验组滩羊体脂分配得到显著改善,尾脂和GR值显著下降(P<0.05),肌内脂肪(IMF)含量显著提高(P<0.05),大理石花纹评分显著提高(P<0.05)。综上所述,饲粮中添加0.10%NCG+0.08%GAA能够显著提高舍饲滩羊生长性能及体脂分配,对舍饲滩羊肉质提升作用明显。
This experiment was conducted to study the effects of combination of N-carbamyl glutamate(NCG)and guanidine acetic acid(GAA) on the growth performance,carcass characteristic and meat quality of Tan sheep. Forty-eight healthy and emasculated Tan lambs with a similar body weight of(22. 52 ± 0. 85) kg were randomly assigned into control group and test group(6 replicates per group,4 lambs per replicate). Those in the control group fed a basal diet,and those in test group received a diet which supplemented 0.10% NCG and0.08% GAA in the basal diet. The experiment lasted for 80 d. The results showed as follows: compared with the control group,1) the average daily weight gain(ADG) and feed conversion rate(FCR) in the test group significantly increased(P<0.05);2) the slaughter rate and net meat rate in test group significantly increased(P<0.05);3) the body fat distribution in test group significantly improved,and the tail fat and GR value decreased significantly(P<0.05),the intramuscular fat(IMF) content significantly increased(P < 0.05),and the marbling grading significantly increased(P < 0. 05). These results indicate that 0. 10% NCG and 0. 08%GAA supplemented to the diet can significantly improve the growth performance and body fat distribution of Tan sheep,and the effect on the meat quality of the Tan sheep is obvious.
作者
刘博
钟锐
寇启芳
牛文智
张桂杰
LIU Bo;ZHONG Rui;KOU Qifang;NIU Wenzhi;ZHANG Guijie(Departments of Animal Science,Ningxia University,Yinchuan 750021,China;Hongsipu District Tianyuan Well⁃Bred Sheep Breeding Co.,Ltd.,Wuzhong 751900,China)
出处
《动物营养学报》
CAS
CSCD
北大核心
2019年第12期5595-5600,共6页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家自然科学基金项目(31702134)
教育部霍英东青年教师基金项目(161106)
宁夏高等学校一流学科建设(草学学科)资助项目(NXYLXK2017A01)
关键词
氮氨甲酰谷氨酸
胍基乙酸
滩羊
生长性能
屠宰性能
脂肪沉积
N-carbamyl glutamate
guanidine acetic acid
Tan sheep
growth performance
slaughter performance
fat deposition
