Performance and egg quality of strains of laying hens after forced molt with different levels of calcium

Authors

  • Milton Albano Jr. Universidade de São Paulo, Faculdade de Medicina Veterinária, São Paulo, SP
  • Ricardo Albuquerque Universidade de São Paulo, Faculdade de Medicina Veterinária, São Paulo, SP
  • César Gonçalvez Lima Universidade de São Paulo, Faculdade de Zootecnia e Engenharia de Alimentos, Pirassununga, SP
  • Esleibe Ghion Universidade de São Paulo, Faculdade de Medicina Veterinária, São Paulo, SP
  • Félix Ribeiro Lima Universidade de São Paulo, Faculdade de Medicina Veterinária, São Paulo, SP
  • Cintra Suzane Dias Morais Universidade de São Paulo, Faculdade de Medicina Veterinária, São Paulo, SP

DOI:

https://doi.org/10.1590/S1413-95962000000400015

Keywords:

Lines, Laying hens, Moult, Calcium, Performance

Abstract

One experiment was conducted to study performance of laying hens of four strains after forced molt: Lohmann White, Babcok, Embrapa-011 (light weight) and Lohmann Brown (semi-heavy weight). Different levels of calcium were applied during the production period (2, 3, 4, 5 and 6%), the experimental design was a random block design with whole 400 birds. Hens were 74 week old at the beginning of the molt phase. The birds fed 2% of calcium showed lower feed consumption and lower egg production. The highest levels of calcium increased the egg shell quality. The color of egg yolk was lower for levels 2 and 6% of calcium. Egg weight, Haugh unit and egg yolk color were related to strain, and the Embrapa-011 showed the lower performance among strains.

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Published

2000-01-01

Issue

Vol. 37 No. 4 (2000)

Section

ZOOTECHNICS

License

The journal content is authorized under the Creative Commons  BY-NC-SA  license (summary of the license: https://creativecommons.org/licenses/by-nc-sa/4.0 | full text of the license: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode) 

How to Cite

1.
Albano Jr. M, Albuquerque R, Lima CG, Ghion E, Lima FR, Morais CSD. Performance and egg quality of strains of laying hens after forced molt with different levels of calcium. Braz. J. Vet. Res. Anim. Sci. [Internet]. 2000 Jan. 1 [cited 2026 Sep. 15];37(4):334-8. Available from: https://revistas.usp.br/bjvras/article/view/5810