Performance of Broilers Fed Corn Soybean Meal Based Diets, with or without Inclusion of Enzymes

[摘要] -This study was run to evaluate the effect of inclusion of an enzymatic cocktail, containing proteases, amilases and cellulases (Vegpro) in broiler diets. The cocktail was added with the ration of 1 kg per 200 kg of soybean meal. Two thousand and forty female Ross chicks were distributed in eight treatments with seven replicates each. A split-plot experimental design was used. Treatments consisted of T1 ¾ control (no enzyme added), T2 ¾ diet five percent lower in energy, protein and amino acids, without enzyme addition. T3 ¾ control (no enzyme added up to 28 days and with enzyme from 29 to 35 days of age), T4 ¾ control (without enzyme up to 21 days and with enzyme from 22 to 35 days of age), T5 ¾ control (plus enzyme addition), T6 ¾ control (plus enzyme addition up to 28 days of age, and five percent lower in energy, protein and amino acids, with enzyme addition from 29 to 35 days of age). T7 ¾ control (with enzyme addition up 21 days of age and five percent lower in energy, protein and amino acids, with enzyme from 22 to 35 days of age), and T8 ¾ five percent lower in energy, protein and amino acids. During the first experimental period, except for T2, body weight, body weight gain and feed intake were not influenced by dietary treatments. Feed conversion and factor of production differed statistically. During the fourth week of experimental period, birds fed T2 were the only ones to differ in body weight and body weight gain. Feed intake, feed conversion and factor of production were not statistically different. During the last week of experimental period, most differences among treatments were observed. The results indicate that Vegpro enzymatic cocktail was not effective in growth performance improvement.

[学科分类] 兽医学

[关键词] chicks;corn;enzymes;performance;soybean meal     IntroduçãoEnzimas são proteínas globulares;de estrutura terciária ou quaternária;que agem como catalisadores biológicos;aumentando a velocidade das reações no organismo;sem serem;elas próprias;alteradas neste processo (Champe & Harvey;1989; Fireman & Fireman;1998)