Níveis de cálcio e relação cálcio: fósforo em rações para poedeiras leves de 24 a 40 semanas de idade
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Data
2016-06
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Editor
José Henrique Stringhini
Resumo
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.
Descrição
Palavras-chave
Aves, Minerais, Ovos, Produção, Egg, Minerals, Poultry, Production
Citação
VELLASCO, Cassia Rampini; GOMES, Paulo Cezar; DONZELE, Juarez Lopes; ROSTAGNO, Horacio Santiago; CALDERANO, Arele Arlindo; MELLO, Heloisa Helena de Carvalho; PASTORE, Silvana Marques. Níveis de cálcio e relação cálcio: fósforo em rações para poedeiras leves de 24 a 40 semanas de idade. Ciência Animal Brasileira, Goiânia, v. 17, n. 2, p. 206-216, abr./jun. 2016. Disponível em: <https://www.revistas.ufg.br/vet/article/view/26916/20909>.