LEVELS OF CALCIUM AND CALCIUM: PHOSPHORUS RATIO IN DIETS FOR LAIYNG HENS AGED 24 TO 40 WEEKS

Authors

  • Cassia Rampini Vellasco Universidade Federal de Viçosa (UFV), Viçosa, Minas Gerais, Brasil
  • Paulo Cezar Gomes Universidade Federal de Viçosa (UFV), Viçosa, Minas Gerais, Brasil
  • Juarez Lopes Donzele Universidade Federal de Viçosa (UFV), Viçosa, Minas Gerais, Brasil
  • Horacio Santiago Rostagno Universidade Federal de Viçosa (UFV), Viçosa, Minas Gerais, Brasil
  • Arele Arlindo Calderano Universidade Federal de Viçosa (UFV), Viçosa, Minas Gerais, Brasil
  • Heloisa Helena de Carvalho Mello Universidade Federal de Goiás (UFG), Goiânia, Goiás, Brasil
  • Silvana Marques Pastore Universidade Federal de Viçosa (UFV), Viçosa, Minas Gerais, Brasil

DOI:

https://doi.org/10.1590/1089-6891v17i226916

Keywords:

Poultry Science

Abstract

Abstract
The objective of this study was to determine the nutritional requirement for calcium and the best calcium:phosphorus ratio in the diet for laying hens from 24 to 40 weeks of age. 324 Hy-Line W-36 birds were distributed in a completely randomized design in 3x3 factorial scheme, consisting of three levels of calcium (3.9, 4.2, and 4.5%) and three calcium:phosphorus ratios (9.3, 10.53, and 12.12:1) totaling nine treatments, six replicates and six birds each. We evaluated performance, egg quality, bone characteristics, balance of calcium and phosphorus, and mortality. There was no interaction (P> 0.05) between calcium levels and calcium:phosphorus ratio for the variables, but levels of calcium affected (P <0.05) weight and shell percentage, calcium in the shell, lost eggs, consumption of calcium and phosphorus, calcium and phosphorus excretion, and retained calcium and phosphorus. The calcium:phosphorus ratio affected significantly (P <0.05) feed intake, weight gain, feed conversion per dozen eggs, egg mass, calcium and phosphorus intake, phosphorus excretion, and retained phosphorus. Diets containing 4.5% calcium and the calcium:phosphorus ratio of 12,12:1, corresponding to a calcium intake of 3.71 g/hen/day and phosphorus of 306 mg/bird /day, guarantee satisfactory performance in diets for laying hens from 24 to 40 weeks.
Keywords: egg; minerals; poultry; production.

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Published

2016-04-29

How to Cite

VELLASCO, Cassia Rampini; GOMES, Paulo Cezar; DONZELE, Juarez Lopes; ROSTAGNO, Horacio Santiago; CALDERANO, Arele Arlindo; MELLO, Heloisa Helena de Carvalho; PASTORE, Silvana Marques. LEVELS OF CALCIUM AND CALCIUM: PHOSPHORUS RATIO IN DIETS FOR LAIYNG HENS AGED 24 TO 40 WEEKS. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 17, n. 2, p. 206–216, 2016. DOI: 10.1590/1089-6891v17i226916. Disponível em: https://revistas.ufg.br/vet/article/view/26916. Acesso em: 21 dec. 2025.

Issue

Vol. 17 No. 2 (2016)

Section

Animal Production

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