Xylanase and β-glucanase in diets for Japanese laying quails

Resumo

The rations of monogastric animals in Brazil are composed of corn and soybean meal. Among the obstacles to
the use of cereal grains in diets is the presence of non-starch polysaccharides, constituents of low digestibility, undigested by
poultry. Thus, it is important to study non-conventional ingredients and the use of additives, such as enzymes in animal feed.
The objective of this study was to evaluate the productivity and metabolism of Japanese laying quails fed with corn or sorghum
feeds containing or not xylanase and β-glucanase. The experimental design was completely randomized in a 2x2 factorial
scheme, with four treatments, with five replicates and seven birds each, to 140 animals. The treatments were: 1) ration based
on soybean meal and maize (RSMM); 2) RSMM with enzymes; 3) ration based on soybean meal and sorghum (RSMS) and
4) RSMS with enzymes. The evaluated variables were: zootechnical performance; metabolizable rations and excreta; quality
and oxidative process of eggs; biometrics of organs and serum biochemistry. There was no significant interaction between the
factors (ingredients x enzymes) for all evaluated characteristics. The rations did not cause changes in the productive variables,
metabolizable, egg quality, biometry of the gastrointestinal tract organs and femur of Japanese laying quails. The total egg mass
was higher in the different rations with enzymatic use. Serum calcium and phosphate concentrations were higher in the RSMM
and RSMM with enzymes, however, the Ca:P ratios remained, indicating a metabolic normality condition in the Japanese quails
from 26 to 35 weeks of age.