Título:	Calcium in the diet of light laying hens: comparison between two tables of nutritional requirements and two sources of dietary limestone.
Autor:	ANIECEVSKI, E. ANTONIZZI VALENTINI, F. D. A. PAGNUSSATT, H. GALLI, G. M. PICOLI, F. STEFANI, L. de C. M. TAVERNARI, F. de C. PETROLLI, T. G.
Afiliación:	EDEMAR ANIECEVSKI, UNIVERSIDADE DO OESTE DE SANTA CATARINA; FERNANDA DANIELI ANTONIAZZI VALENTINI, UNIVERSIDADE DO OESTE DE SANTA CATARINA; HELOÍSA PAGNUSSATT, UNIVERSIDADE DO OESTE DE SANTA CATARINA; GABRIELA MIOTTO GALLI, UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL; FERNANDA PICOLI, UNIVERSIDADE ESTADUAL DE SANTA CATARINA; LENITA DE MOURA STEFANI, UNIVERSIDADE ESTADUAL DE SANTA CATARINA; FERNANDO DE CASTRO TAVERNARI, CNPSA; TIAGO GOULART PETROLLI, UNIVERSIDADE DO OESTE DE SANTA CATARINA.
Año:	2025
Referencia:	Revista Observatorio de La Economia Latinoamericana, v. 23, n. 10, p. 1-20, 2025.
Descripción:	There is a discrepancy regarding the nutritional requirements of laying hens, making it difficult to prepare and establish adequate nutritional programs. The objective of this study was to compare two tables of nutritional requirements for laying hens and two sources of limestone on performance, egg quality, and digestibility of calcium and phosphorus. Ninety-six laying hens of the Hy-Line W36 lineage were used in five production cycles of 21 days each, randomly assigned in a 2x2 factorial design with four treatments and eight replications. Hens fed with limestone A showed higher production in the 2nd and 5th cycles. Eggshell breaking strength was greater in laying hens that received the diet suggested by the Hy-Line Guidelines between 33 and 35 weeks, regardless of the limestone type. The Haugh unit increased in eggs from the third cycle of the Hy-Line/B group compared to those fed with limestone A. The percentage of calcium in the excreta was higher in hens that received limestone A. Laying hens fed according to the lineage manual excreted less phosphorus, even though they ingested higher daily amounts. It is concluded that both nutritional programs and limestone sources promoted good productive performance and internal and external egg quality.
Thesagro:	Poedeira Comercial Digestibilidade
NAL Thesaurus:	Digestibility Egg quality Poultry
Palabras clave:	Layer Production Qualidade de ovo
DOI:	10.55905/oelv23n10-038
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CNPSA)