ARABINOFURANOSIDASE E XILANASE NA DIETA DE CODORNAS JAPONESAS

Abstract

Enzymes are used in feed formulation to improve the nutrients availability, to eliminate anti-nutritional factors from diet, thus making it possible to include lower quality ingredients in the animals' diet. The objective was to evaluate the effect of including enzymes in Japanese quail diets on performance, egg quality, digestive organs and tibia and femur biometrics. 180 female quails of the species Coturnix japonica were used, aged approximately 120 days of age, standardized by body weight, distributed in galvanized wire cages measuring 33 cm long × 25 cm wide × 20 cm high, providing 117 cm2/bird, composed of feeders and drinkers. The design was completely randomized (DIC), with two experimental tests: experiment 1, used three treatments and ten replications with arabinofuranosidase and xylanase inclusion containing six birds per cage. The treatments consisted of: control treatment based on corn from the bottom of the silo (MFS) + soybean meal (FS), treatment with MFS + FS + arabinofuranosidase inclusion at 50 g/T of feed and treatment with MFS + FS + arabinofuranosidase inclusion of 100 g/t. Experiment 2, using the control treatment (MFS + FS) and treatments with arabinofuranosidase levels (treatment with MFS + FS + arabinofuranosidase inclusion at 50 g/t of feed and treatment with MFS + FS + xylanase inclusion at 50 g/t of portion). Performance (feed consumption per bird per day, feed conversion per egg mass, feed conversion per dozen, egg mass, laying percentage, bird weight gain), biometrics of the gastrointestinal tract and its organs (liver and pancreas), the egg weight and internal quality of the egg (yolk and albumen), bone biometry (tibia and femur) were evaluated. In experiment 1, arabinofuranosidase levels (50 g/T and 100g/T) improved the performance of quails, an effect was observed on egg quality parameters. There was an increase in weight, a decrease in height and pH in the yolk, while in the albumen there was an increase in height. The gastrointestinal tract was influenced by the test treatments with enzyme levels. Considering these results, it was concluded that arabinofuranosidase proved to be more efficient at the level of 100g/ton. In experiment 2, the effect of the tested enzymes on performance parameters, gastrointestinal tract biometry and internal quality of quail eggs was verified. Concluding that xylanase proved to be more efficient than the arabinofuranosidase enzyme.