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Authors

  • Luci Sayori Murata Universidade de Brasília, Campus Universitário Darcy Ribeiro
  • Joji Ariki UNESP, Departamento de Zootecnia, Jaboticabal – SP, Brasil
  • Angela Patrícia Santana Universidade de Brasília, Campus Universitário Darcy Ribeiro
  • Roberto de Moraes Jardim Filho Universidade de Brasília, Campus Universitário Darcy Ribeiro

DOI:

https://doi.org/10.5007/2175-7925.2009v22n1p103

Abstract

Effects of calcium levels and limestone on laying hen performance and egg shell quality. An experiment was carried out to evaluate the influence of calcium levels and combinations of limestone particle sizes on the laying performance and egg shell quality of hens. Three hundred and sixty Hy-Line laying hens of 57 weeks of age were used, distributed in a randomized design in 3x5 factorial arrangement (3.75, 4,15 and 4,55% of calcium in the diet and 0, 25, 50, 75 and 100% of replacement of limestone powder) with 4 replicates, each consisting of 6 hens. Egg production, feed conversion, egg weight, and strength and thickness off egg shell were influenced by diet calcium levels. No single effect of limestone particle size replacement was found in the studied parameters. The average egg weight was improved when different diet calcium levels, interacting with different combinations of limestone particle sizes, were used.

Author Biographies

Luci Sayori Murata, Universidade de Brasília, Campus Universitário Darcy Ribeiro

Universidade de Brasília, Campus Universitário Darcy Ribeiro
Faculdade de Agronomia e Medicina Veterinária Caixa Postal 4508, CEP 70.910-900, Brasília – DF, Brasil

Joji Ariki, UNESP, Departamento de Zootecnia, Jaboticabal – SP, Brasil

UNESP, Departamento de Zootecnia, Jaboticabal – SP, Brasil

Angela Patrícia Santana, Universidade de Brasília, Campus Universitário Darcy Ribeiro

Universidade de Brasília, Campus Universitário Darcy Ribeiro

Roberto de Moraes Jardim Filho, Universidade de Brasília, Campus Universitário Darcy Ribeiro

Universidade de Brasília, Campus Universitário Darcy Ribeiro

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Published

2009-08-31

Issue

Vol. 22 No. 1 (2009)

Section

Artigos

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