Xylanase and Phytase Supplementation in the De-oiled Rice Bran (DORB) based Diet Improves the Growth Performance of Labeo rohita

Abstract

A 60-day experiment was conducted to study the effect of xylanase and phytase supplementation in the DORB based diet on growth performance of Labeo rohita. Two iso-nitrogenous (crude protein-14%) test diets (T1-DORB based diet, T2-phytase and xylanase supplemented diet) were formulated. Sixty (60) juveniles of L. rohita, with an average weight 5.01±0.02g were stocked in six uniform size plastic rectangular tank in triplicates with 10 fishes per tank following a completely randomized design (CRD). At the end of the experiment growth performance and nutrient utilization of L. rohita were assessed and found that exogenous enzyme supplementation @ 0.01% in the DORB based diet significantly (p<0.05) improved the growth performance and nutrient utilization (weight gain % from 63.6% to 79.7%, SGR from 0.82 to 0.98, PER from 2.01 to 2.44 and FCR reduced from 3.57 to 2.92) of L. rohita. Carcass composition of fishes did not vary significantly. Hence, the experiment concludes that exogenous enzyme supplementation of xylanase and phytase in the DORB based diet improves the growth performance of L. rohita.