Effects of Trichoderma fermented wheat bran on growth performance, intestinal morphology and histological findings in broiler chickens

摘要

This experiment investigated the effects of wheat bran fermented with Trichoderma pseudokoningii (FWB) on growth performance, intestinal morphology and the incidence of non-specific pathological lesions in broilers. In vitro experimental results showed that cellulase and xylananse activity of fermented wheat bran reached its peak at day 4 and solid-state fermentation (SSF) enhanced the reducing sugar content. In addition, the possibility of Trichoderma adhering to the broiler’s crop epitheliums was also discovered. A total of 180?day-old Ross 308 male broilers were randomly distributed into one of the three dietary groups until 35 d of age: basal diet (control), 10% of basal diet replaced with wheat bran (10% WB) or 10% of diet replaced with fermented wheat bran (10% FWB). Results showed that 10% FWB group had lower feed consumption than the others, but improved feed conversion ratio (FCR) for starter phase (1 to 21 d) when compared to the control group. Furthermore, 10% FWB group had significantly increased villus height and villus height/crypt depth ratio in the ileum compared to the control group. Coliform bacteria count in the ileum was lower in the 10% WB group than the control, however, there were no differences between the 10% WB and 10% FWB treatment groups in the C. perfringens count. There were no morphological changes or incidences of non-specific pathological lesions in the 10% FWB group. These results suggested that replacing 10% of a basal diet with fermented wheat bran could not only improve growth performance but also provide optimal intestinal morphology in broilers.