Study on Lysine and Methionine Content Promotion of Soybean Meal by Probiotic Fermentation Process

Abstract Soybean meal (SBM) is commonly used for livestock feeds, but its application in diets for livestock is limited due to some antinutritional factors. The contents of methionine and lysine of soybean meal were promoted by Bacillus natto and Leuconostoc mesenteroides fermentation, benefial for the livestock feeds. It was crude protein (CP) 56.8%, methionine 43.56 mg • g −1 , and lysine 74.87 mg • g −1 , cows fed a diet with FSBM milk yield raised 14.2%, the change in the milk protein, the lactose and the dry matter content had also obvious increase. This convenient technique offers helpful exploration for industrialization of soybean meal fermentation.