UNASSIGNED: An experiment with 288 male (Ross 308) 1-d-old broilers was conducted to test the hypothesis that a coarse diet supplemented with @entity4877 (BA) and fermentable @entity3363 (FC) improves performance of broilers with a poorly digestible protein source. The interaction effects of diet structure (fine or coarse), FC supplementation (with or without), and BA supplementation (with or without) in a poorly digestible diet based on rapeseed meal (RSM) were tested in a factorial arrangement of 8 (2 * 2 * 2) dietary treatments. The coarseness of the diet affected feed intake (FI) (P < 0.001), BW gain (P = 0.001), and the @entity6780 ( @entity6780 ) (P = 0.001) positively. Broilers fed the coarse diets had, on average, 14% heavier gizzards and 11, 7, 5, and 6% lower relative empty weights of the crop, duodenum, jejunum, and ileum, respectively, compared with those fed the fine diets. Dietary coarseness resulted in, on average, 6% greater ileal protein digestibility, 20% lower gizzard pH, 19% greater villus height, 18% lower crypt depth, and 23% reduced cecal branched chain @entity1718 (BCFA) compared with @entity1573 fed the fine diets. Broilers fed BA-supplemented diets had an improved @entity6780 (P = 0.004) and decreased crypt depth (P < 0.001) compared with those fed diets without BA. Fermentable @entity1735 supplementation did not influence growth performance, gut development, or contents of total BCFA and total biogenic @entity4478 in the cecal digesta (P > 0.05). Supplementation with FC, however, decreased the cecal concentration of @entity8037 by approximately 31% compared with broilers fed diets without FC (P = 0.002). In conclusion, feeding a coarse diet supplemented with BA improved performance of broilers fed a diet containing a poorly digestible protein source. The negative effects of a poorly digestible protein source can thus be partly counterbalanced by coarse grinding and BA supplementation in the diet.

Diet structure, XXXX , and fermentable @entity3363 influence growth performance, gut morphology, and cecal fermentation characteristics in broilers.

@entity6780 :: ('100310558(Tax:9031)', 'Gene') :: ['feed conversion ratio', 'FCR'] @entity1735 :: ('CHEBI:16646', 'Chemical') :: ['carbohydrate'] @entity8037 :: ('MESH:D013096', 'Chemical') :: ['spermine'] @entity4478 :: ('MESH:D000588', 'Chemical') :: ['amines'] @entity4877 :: ('MESH:D020148', 'Chemical') :: ['butyric acid'] @entity1573 :: ('9031', 'Species') :: ['chickens'] @entity1718 :: ('MESH:D005227', 'Chemical') :: ['fatty acids'] @entity3363 :: ('MESH:D002241', 'Chemical') :: ['carbohydrates']
@entity4877 :: (MESH:D020148,Chemical) :: ['butyric acid']
