an increasing trendP < 0.10
The contents of threonine, valine, methionine, isoleucine, phenylalanine, lysine, and alanine in the testes of 150-days-old boars in the LEU group was the same as the CON group ( P > 0.05), while Leu, aspartic acid, glutamic acid, and total acid hydrolyzed AA showed an increasing trend (0.05 < P < 0.10) ( Table 8 ).