Artigo
Alternative calcium source effects on commercial egg production and quality
Fecha
2007-06-01Registro en:
Brazilian Journal of Poultry Science. Campinas: Facta-fundacio Arnco Ciência Tecnologia Avicolas, v. 9, n. 2, p. 105-109, 2007.
1516-635X
10.1590/S1516-635X2007000200005
S1516-635X2007000200005
WOS:000257537600005
WOS000257537600005.pdf
6743591347106727
7728883010098049
Autor
Universidade Estadual Paulista (Unesp)
Resumen
This study aimed at verifying the possibility of replacing calcitic limestone by marine calcium in the diet of layers. A total number of 321 Hi-sex hens, with 40 weeks of age at the beginning of the experiment, was used. A completely randomized experimental design was applied, with 5 treatments (0, 15, 30, 45, and 60 % of calcitic limestone replacement by marine calcium source) and eight replicates of eight birds each. Treatments significantly affected specific gravity (p<0.05), with the inclusion of 60% marine calcium (T5) presenting the worst result as compared to T1, which included only calcitic limestone as calcium source. It was concluded that marine calcium can replace up to 45% of calcitic limestone with no effects on performance or egg quality.