Responses of Broiler Chickens Fed Low or High Non-Starch Polysaccharide Diets and the Addition of Humic Substances from a Worm Compost

The objective was to evaluate the productivity, microbiology and histopathology of jejunum, ceca liver in broilers fed a control or high non-starch polysaccharide (HNSPs) diet added with an extract humic substances (EHS). 240 individually allocated, from 21-42 d age were assigned factorial arrangement 2 types diets: 1) A corn/soybean meal (Control) 2) As Control plus 7% distillers dried grain solubles 12% wheat bran (HNSPs), 3 growth promoters: Antibiotic promoters (AGP); without AGP (NAGP) C) 0.5% EHS. At end trial, breast carcass weighed samples intestine, taken for microbial analysis. Results subjected ANOVA. EHS-fed had lower feed conversion ratio (FCR) total aerobic bacterial (TAB) counts higher ashes digestibility diet, but negative responses seen HNSPs (Type promoter interaction, p≤0.05). lesion scores jejunum (p≤0.05). TAB E. coli AGP-fed (p<0.01) compared NAGP EHS groups. showed improved FCR ileal score similar weight gain broilers.