Effect of Aspergillus niger Fermentation on the Metabolites in Corn Stalks

Fermentation has been considered as an effective means to improve the feed nutrient digestibility of corn stalks, and it is beneficial animal growth performance health. The functions fermented stalks are related variety metabolites produced through fermentation, but nature these components still unclear. In this study, gas chromatography–mass spectrometry, combined with principal component analysis partial least squares discriminant analysis, was used explore differential before after Aspergillus niger fermentation. A total 32 potential characteristic compounds were obtained, mainly including sugar glycoside derivatives, organic acids their alcohol compounds, benzene its substituted amino acids, phenolic flavonoids. Compared in straw relative content D-threitol, mannitol-1-phosphate, coniferin, citrazinic, oxoglutaric acid, chenodeoxycholic naproxen, 5-aminovaleric vanillin, catechin, UDP-glucuronic acid significantly increased, N-acetylgalactosamine, heneicosanoic chlorogenic adenosine decreased. Kyoto Encyclopedia Genes Genomes pathway showed that 20 metabolic pathways corresponded metabolites. results study will provide theoretical support for quality evaluation high-value product development future.