The effects of eggshell and oyster shell supplemental as calcium sources on performance, eggshell quality and mineral excretion in laying hens
Küçük Resim Yok
Tarih
2015
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
AGRICULTURAL RESEARCH COMMUNICATION CENTRE
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
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, 1/3 oyster 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<0.01; p<0.05). The different calcium sources had significantly effect on eggshell calcium content, and calcium, phosphorus and magnesium-excretion in hens (p<0.01). Results of the present study observed that laying hens were not advantageous for performance by fed with eggshell and oyster shell as calcium sources.
Açıklama
Anahtar Kelimeler
Eggshell, Eggshell quality, Laying hens, Mineral excretion, Oyster shell
Kaynak
INDIAN JOURNAL OF ANIMAL RESEARCH
WoS Q Değeri
Q4
Scopus Q Değeri
Q2
Cilt
49
Sayı
2
