Phosphorus and phytase levels for layer hens

Authors

  • Juliana Cristina Ramos Rezende Universidade Estadual Paulista, Faculdade de Medicina Veterinária e Zootecnia, Botucatu, SP
  • Antonio Carlos de Laurentiz Universidade Estadual Paulista, Faculdade de Engenharia de Ilha Solteira, Departamento de Biologia e Zootecnia, Ilha Solteira, SP
  • Rosemeire da Silva Filardi Universidade Estadual Paulista, Faculdade de Engenharia de Ilha Solteira, Departamento de Biologia e Zootecnia, Ilha Solteira, SP
  • Vitor Barbosa Fascina Universidade Estadual Paulista, Faculdade de Medicina Veterinária e Zootecnia, Botucatu, SP
  • Daniella Aparecida Berto Universidade Estadual Paulista, Faculdade de Medicina Veterinária e Zootecnia, Botucatu, SP
  • Sérgio Turra Sobrane Filho Universidade Estadual Paulista, SP

DOI:

https://doi.org/10.17523/bia.v70n2p149

Keywords:

bone characteristics, calcium, egg quality, performance, phytate

Abstract

The objective of this research was to evaluate the performance and bone quality of laying hens after peak production fed diets containing phosphorus levels and phytase. An experiment was conducted with 384 Hy-line distributed in a completely randomized in a factorial 4 x 3 with 4 levels of available phosphorus and 3 levels of phytase. The experimental period was divided into four periods of 28 days, at the end of each cycle were determined experimental feed intake, egg production, egg weight, feed conversion, mortality, and average egg weight, shell thickness, Haugh units and specific gravity. At the end of the experimental period were determined amounts of calcium and phosphorus excreted by the method of total excreta collection and a fowl per experimental unit was sacrificed for collection of bones and evaluation of width, length and level of robustness from femur and tibia. There was interaction between phosphorus levels and phytase on feed intake, feed conversion and percentage of posture. For inclusion levels of phytase all egg quality variables showed no significant differences. The treatments did not affect bone characteristics of laying hens.

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Published

2013-02-11

Issue

Section

ANIMAL NUTRITION

How to Cite

Phosphorus and phytase levels for layer hens. (2013). Bulletin of Animal Husbandry, 70(2), 149-157. https://doi.org/10.17523/bia.v70n2p149

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