Utilização de aditivos fitogênicos na dieta de poedeiras semipesadas

Abstract

The objective of this work was to evaluate the performance and egg quality of laying hens of the Hy-line Brown line fed with phytogenic additives. Four hundred hens of the Brown lineage, aged 41 to 62 weeks, were distributed in a completely randomized design, consisting of five treatments, eight replicates and eight birds per experimental unit. Supplementation of three different phytogenic additives, provided by the sponsoring company, identified only as product 1, 2 and 3, being the treatment 1 basal diet, 2 basal + sodium bicarbonate treatment, 3 basal diet + product 1 treatment 4 (g / bird / day), productivity (%), egg weight (g), egg mass (g / ave / day), basal diet + product 2 and treatment 5 basal diet + product 3. The variables evaluated for performance were feed consumption / day), conversion by mass (kg / kg) and per dozen eggs (kg / dz). For egg quality, albumen height and yolk, larger and smaller diameter of the yolk, yolk index, Haugh unit, yolk color, yolk weight, percentage (%) of yolk, albumen and bark and thickness of the bark (μm ), and specific gravity (g / cm 3). There was no significant effect on the performance of the animals fed with phytogenic additives, but there was an effect for day and shelf egg quality, for egg of the day there was a significant effect (p <0.05) for egg weight, egg weight , percentage of yolk and shell, yolk percentage, albumen percentage and shell thickness, for eggs stored at 14 days there was a significant effect (p <0.05) for egg weight, yolk weight, weight of Albumin, albumen height, bark weight, percentage of bark and Haugh Unit and for eggs stored with 21 days there was effect of treatments (p <0.05) for egg weight, yolk weight, yolk index, height of yolk, albumen weight and bark weight. Phytogenic additives may be offered in diets for laying hens aged 41 to 62 weeks of age for improving the quality of eggs, especially shelf eggs.