动物营养学报Issue(11)：3452-3460,9.DOI:10.3969/j.issn.1006-267x.2014.11.035
饲料中添加谷氨酸对生长中期草鱼肌肉品质的影响
Effects of Dietary Glutamate on Muscle Quality of Grass Carp (Ctenopharyngodon idella) during Middle Growth Period
摘要
Abstract
The present study was performed to investigate the effects of dietary glutamate on muscle quality of grass carp ( Ctenopharyngodon idella) during middle growth period. A total of 540 grass carp with the initial body weight of (370.0±3.8) g were randomly allocated 3 groups with 3 replicates per group and 60 fish per replicate. The fish in the 3 groups were fed 3 experimental diets with the glutamate supplemental levels of 0 ( control) , 0.8% and 1.6%, respectively. The experiment lasted for 56 days. The results showed as follows:dietary supplementation with 0.8% and 1.6% glutamate significantly decreased the muscle fiber diameter ( P<0.05), and significantly increased the muscle fiber density (P<0.05), but did not significantly affect the mus-cle cross sectional area and pH ( P>0.05) . Dietary supplementation with 0.8% and 1.6% glutamate significant-ly increased the muscle hardness, springiness, chewiness and gumminess ( P<0.05) , but did not significantly affect the muscle cohesiveness ( P>0.05) . Dietary supplementation with 0.8% and 1.6% glutamate did not sig-nificantly affect the composition of conventional nutrients and amino acids in muscle ( P>0.05) . The content of inosine monophosphate in muscle was significantly increased by dietary supplementation with 0.8% and 1.6%glutamate ( P<0.05) . Moreover, the relative expression level of adenylosuccinate lyase mRNA in muscle was significantly increased by dietary supplementation with 0.8% glutamate (P<0.05). These results indicate that dietary glutamate can improve the muscle fiber structure and muscle texture characteristics, and increase the content of muscle flavor substance-inosine monophosphate, which improve the muscle quality of grass carp during middle growth period.关键词
谷氨酸/草鱼/肌纤维密度/质构特性/风味物质Key words
grass carp (Ctenopharyngodon idella)/muscle fiber density/texture characteristics/flavor sub-stance分类
农业科技引用本文复制引用
赵叶,周小秋,胡肄,李家勇,李欠,冯琳,姜维丹,刘扬,姜俊..饲料中添加谷氨酸对生长中期草鱼肌肉品质的影响[J].动物营养学报,2014,(11):3452-3460,9.基金项目
四川省科技支撑计划项目（2014FZ0026）；国家级大学生创新训练项目 （）
