Indian Journal of Animal Research

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Indian Journal of Animal Research, volume 49 issue 2 (april 2015) : 205-209

The effects of eggshell and oyster shell supplemental as calcium sources on performance, eggshell quality and mineral excretion in laying hens

Osman Olgun*, Alp Önder Yildiz, Yusuf Cufadar
1Department of Animal Science, Faculty of Agriculture, Selcuk University, 42075 Konya, Turkey.
Cite article:- Olgun* Osman, Yildiz Önder Alp, Cufadar Yusuf (2024). The effects of eggshell and oyster shell supplemental as calcium sources on performance, eggshell quality and mineral excretion in laying hens. Indian Journal of Animal Research. 49(2): 205-209. doi: 10.5958/0976-0555.2015.00056.4.

ABSTRACT

A study was conducted to determine the influence of different calcium sources in layer diets on performance, eggshell quality and mineral excretions. A total of 72 Hy-Line W36, layer birds of 25 weeks old, were distributed in 6 experimental groups randomly. In each experiment group there were 4 replicates, and in each replicates there were 3 birds. During the 12 weeks experiment period, birds were fed 6 experimental diets. Experimental diets were consisted of various calcium sources for meeting the calcium requirements. It was control (limestone), 1/3 eggshell, 1/3oyster shell, 1/3 eggshell+1/3 oyster shell, 2/3 eggshell and 2/3 oyster shell. Dietary different sources of calcium had no significant effect on body weight change, feed conversion ratio, eggshell breaking strength, eggshell thickness, and eggshell phosphorus and magnesium contents (p > 0.05). The different sources calcium had a significantly effect on egg production, egg weight, egg mass, feed intake and eggshell weight in laying hens (p

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