Effects of different dietary ratio lysine and arginine on growth, muscle fiber development and meat quality of Megalobrama amblycephala

The purpose of this experiment was to explore the effects of different dietary lysine to arginine ratio (L:A) on the growth performance, muscle fiber development and muscle quality of Megalobrama amblycephala. 300 healthy M. amblycephala with an average initial weight of 41.49 ± 0.78 g were randomly divided into 5 groups with 4 replicates in each group. The 8-week breeding experiment was carried out with 5 levels of L:A (2.00, 1.50, 1.00, 0.67 and 0.50). The results showed that final body weight (FBW) and weight gain rate (WGR) increased significantly in the group with dietary L:A= 1.00 (P