<b>Apparent digestibility coefficients of energy and nutrients of full-fat soybean meal with and without phytase for Nile tilapia (Oreochromis niloticus)</b> - DOI: 10.4025/actascianimsci.v27i3.1213

Abstract

This work was carried out to determine the apparent digestibility coefficients (ADC) of energy and nutrients in supplemented (1000 phytase unit/kg of diet) and non supplemented full-fat soybean meal by Nile tilapia (110.3 ± 20 g). Fish were fed on pelletized diet to apparent satiation. A reference diet with 26.76% crude protein and 3400 kcal digestible energy/kg were utilized. To formulate the test diet, the full-fat soybean meal replaced 30% of the reference diet. Chromic oxide was utilized as an inert indicator. Faeces were collected by modified Guelph system. The ADC of dry matter, gross energy, crude protein, ether extract and total phosphorus were, respectively, 67.64, 73.34, 92.49, 96.12 e 26.14% and 65.96; 75.33; 93.28; 95.73 and 58.82% for full-fat soybean meal without and with phytase supplementation. Results show that full-fat soybean meal is effectively utilized by the Nile tilapia and phytase supplementation improves the availability of total phosphorus