Digestibilidade de nutrientes em raÃÃo com complexo enzimÃtico para tilÃpia-do-Nilo (Oreochromis niloticus). / Digestibility of nutrients in diet with enzimatic complex for tilÃpia do Nilo(Oreochromis niloticus)




A digestibility trial was conducted in the Pisciculture Station at the Federal University of Lavras (UFLA) with the purpose of evaluating the effects of the diet supplementation with an enzyme complex upon the nutrient digestibility in juveniles of Nile tilapia (Oreochromis niloticus). The experimental diets were on the basis of soybean meal and corn, isoprotein (30% of CP), isoenergy (4,243 kcal/kg of CE) and supplemented with the enzyme complex a the levels of 0.0%; 0.025%; 0.050%; 0.075% and 0.1%. The determination of apparent digestibility was performed through the indirect method with use of chrome oxide (Cr203) as a reference substance. The trials utilized 50 male Nile tilapia juveniles (Oreochromis niloticus), weighing on average 90g, distributed randomly in tem digestibility tanks. The experiment was conducted in three experimental periods, with five treatments and two repetitions for period. For statistical evaluation, the regression model through the statistic program SISVAR was employed. The addition of the enzyme complex to the diet improved the apparent digestibility coefficient of dry matter (CDAMS), crude protein (CDAPB), gross energy (CDAEB), starch (CDAAM), calcium (CDACa) and phosphorus (CDAP). The best results were observed at the level of 0.050% of diet supplementation.


peixe aquaculture supplementation zootecnia milho enzimas exÃgenas farelo de soja corn soybean meal exogenous enzymes suplementaÃÃo aqÃicultura fish

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