不同形态N-氨甲酰谷氨酸对滩羊生长性能、血清生化指标和脂肪分配的影响

Effects of Different Types of N-carbamylglutamate on the Growth Performance,Serum Biochemical Indexes and Fat Distribution of Tan Sheep

试验旨在比较N-氨甲酰谷氨酸(NCG)和瘤胃保护型NCG(RP-NCG)对滩羊生长性能、血清生化指标和脂肪分配的影响。选取日龄相近、体重为(20.14±0.31)kg公滩羔羊60只,随机分为3组:对照组、0.1%NCG处理组和0.1%RP-NCG处理组,每组5个重复,每个重复4只羔羊。对照组不添加NCG,0.1%NCG组添加0.1%NCG,0.1%RP-NCG组添加0.1%RP-NCG。试验期80d。结果显示:1与对照组相比,日粮中添加NCG和RP-NCG能够显著提高滩羊平均日增重并降低料重比(P<0.05),但两试验组之间差异不显著(P>0.05);2日粮中添加NCG和RP-NCG,显著降低了血清尿素氮含量(P<0.05),但对血清总蛋白、肌酐和肌酸激酶的活性影响不显著(P>0.05);3与对照组相比,添加NCG和RP-NCG使滩羊净肉重/胴体重显著提高(P<0.05),皮下脂肪和GR值显著下降(P<0.05),两试验组间差异不显著(P>0.05);试验组肌内脂肪(IMF)含量显著升高(P<0.05)。综上所述,日粮添加0.1%NCG或0.1%RP-NCG可提高舍饲滩羊生长性能,并能改善滩羊脂肪分配。与RPNCG相比,NCG对滩羊生长性能、血清生化指标及脂肪分配无显著影响。

The objective of the present experiment was to determine the effect of different types of N-carbamoylglutamate on growth performance,serum biochemical indexes and fat distribution of Tan sheep.Sixty male Tan lambs with average weight of （20.14±0.31）kg and similar age were randomly assigned three groups with five replications per group and 4 lambs per replication.The lambs in control group were fed basal diet,while lambs in test groups were fed diets containing 0.1% NCG and 0.1% RP-NCG,respectively.The results showed that：①Comparing with control group,the ADG was significantly improved （P 〈0.05）and F/G was significantly decreased （P 〈0.05）when 0.1% NCG or 0.1% RP-NCG were supplemented,while there was no significant difference between two experimental groups （P 〉0.05）.②Dietary supplemented with 0.1% NCG or 0.1% RP-NCG significantly decreased the serum urea nitrogen （P 〈0.05）,but there were no significant differences in serum total protein,creatinine content and creatine kinase activity （P 〉0.05）.③The ration of meat weight to carcass weight of two experimental groups was significant-ly improved （P 〈0.05）.As 0.1% NCG or 0.1% RP-NCG were supplemented in the diets,the content of subcutaneous fat and GR value were significantly decreased （P 〈0.05）,and the content of intramuscular fat （IMF）was significantly increased （P 〈0.05）.In conclusion,dietary supple-mented with 0.1% NCG or 0.1% RP-NCG could improve the growth performance and slaughter performance while there was no significant difference between NCG and RP-NCG.