Effect of Ronozyme® WX (CT) supplementation on apparent and true ileal amino acid digestibility coefficients in Broiler chicks fed varying levels of rice bran

Rice bran has not been used as a common ingredient of poultry rations because of limiting factors, hence, the study. Two hundred and forty 21-day-old Abor Acre plus chicks were randomly allotted to six diets with varying levels of rice bran (RB) (100, 200, and 300 g/kg) without (0g/kg) or with Ronozyme® WX (25g/kg) supplementation to assay the effect on apparent and true ileal amino acid (AA) digestibility coefficients using a regression approach in a 2x3 factorial arrangement using a randomized complete block design. Each treatment had 5 replicates with 8 birds each. On d 26 (5thday of treatment feeding), digesta was sampled for amino acid assay following standard procedure. Data were analyzed using a general linear model at α0.05. Rice bran at 10% for the essential amino acids with enzyme was significantly higher but compared with concentrations of RB at 10% and 20% without enzyme. No observed significant differences among the true ileal amino acid digestibility coefficients except lysine (10% RB) without enzyme (0.91) which was significantly higher than 20% RB with enzyme (0.84) but similar to other treatments.Rice bran with enzyme had a significant (P<0.05) interactive effect on the apparent ileal digestibility coefficients of arginine, histidine, isoleucine methionine, and phenylalanine. When RB was supplemented with enzyme, a significant (P<0.05) interactive effect on true ileal digestibility coefficients of arginine and methionine was observed. The slopes of the regression lines ranged from 0.77 (arginine) to 0.98 (phenylalanine). In conclusion, the inclusion of 10% and 20% rice bran supplemented with Ronozyme® WX improved the methionine and lysine content