表2-6 小肠黏膜形态数据.xls

In sum, oral administration of <em>L. plantarum</em> JL01 and <em>L. rhamnosus</em> GG ATCC53103 to weaned piglets increased apparent nitrogen digestion. We found that dietary supplementation of <em>L. plantarum</em> JL01 and <em>L. rhamnosus</em> GG ATCC53103 improved the gut microbial diversity of weaned piglets. With the help of functional genes encoded by intestinal dominant bacteria, the production of dominant metabolites L-tryptophan 3-Phosphonooxypyruvate, cis-Aconitate and Carbamoyl phosphate is promoted, and these metabolites promote the TCA cycle in different ways, which may lead to the increase of AKG, and then play a positive regulatory role in skeletal muscle protein deposition. Moreover, L-tryptophan has a positive regulatory effect on nitrogen metabolism. This finding further highlights the importance of gut microbiota for nitrogen metabolism and demonstrates an effect of <em>L. plantarum</em> JL01 and <em>L. rhamnosus</em> GG ATCC53103 to promote nitrogen metabolism in weaned piglets.