STUDY OF THE XYLANASE IN COMMERCIAL POULTRY FOODS SUPPLIED TO RATS UNDER LABORATORY CONDITIONS

Abstract

Two trials were conducted at Laboratório de Enzimologia do Instituto de Ciências Biológicas (I.C.B.) and Departamento de Zootecnia da Escola de Agronomia e Veterinária da Universidade Federal de Goiás, to determine: a) Influence of xylanase (fungic preparations) in poultry rations fed to rats; b) Possibility to use xylanase to improve commercial rations to monogastrics. A total of 48 rats were randomized in 12 metallic cages in an experimental design with 4 treatments and 3 repetitions. The treatments used were: Trial 1 : T - Commercial ration to broilers (table II); A - Commercial ration + 0.02% of xylanase; B - Commercial ration + 0.04% of xylanase; C - Commercial ration + 0.06% of xylanase. Trial 2 - As trial 1, but the levels of xylanase were 0.1, 0.2 and 0.4% (treatment A, B and C, respectively). The following conclusions are presented: a) Increasing levels of xylanase didn’t improve weight gains, feed consumption and feed gain; b) Different levels of crude fiber and xylanase should be studied in other experiments.