Role of phytase supplementation in improving mineral digestibility of dry bread meal based diet fed to Labeo rohita fingerlings

A feeding trial was conducted to study the effect of phytase supplementation on apparent digestibility of mineral in labeo rohita fingerlings fed on dry bread meal (dbm) based diet. eight experimental diets consisting of one reference diet and seven test diets,designated as dbm1 (0 ftu/kg),dbm2 (250 ftu/kg),dbm3 (500 ftu/kg),dbm4 (750 ftu/kg),dbm5 (1000 ftu/kg),dbm6 (1250 ftu/kg) and dbm7 were prepared. each test diet was consisted of 70% reference diet and 30% test ingredient i.e. dry bread. apparent digestibility coefficient (adc) of each mineral was estimated by using chromic oxide as an inert marker. highest adc for ca,p,fe,cu,zn,na,k and mn was observed in the dbm4 diet which was supplemented with phytase level of 750 ftu/kg. results from the present study indicated that phytase supplementation may be useful to develop cost effective and environment friendly aqua feed for l. rohita fingerlings.