Esen Feraye GÜRSEL, Kemal ÖZTABAK, Süleyman Korkut TEKELİ

Yumurtacı tavukların yemine yüksek dozda ilave edilen bakırın yumurta üretimi, yumurta kabuk ağırlığı ve yumurta kabuk kalınlığına etkisi

Yumurta tavuğu yemine katılan bakırın yumurta verimi ve kabuk kalitesi üzerine etkilerinin belirlenmesi amacıyla yapılan bu çalışmada 60 adet, 20 haftalık beyaz leghorn yumurta tavuğu kullanılmış ve deneme 70 gün sürmüştür. Denemede yer alan tavuklardan her bir grupta 20 adet hayvan olacak şekilde bir kontrol ve iki adet deneme grubu oluşturulmuştur. Kontrol grubunun yemine deneme süresince dışarıdan bakır ilave edilmezken, deneme-1 ve 2 gruplarının yemlerine ise çalışmanın ilk gününden itibaren bakır katılmıştır. Çalışmada günlük olarak yumurtalar toplanarak yumurta sayısı, kabuk kalınlığı ve ağırlığı ölçümleri yapılmıştır.Çalışmanın ilk 42 günü süresince, yumurta verimi açısından tüm gruplar arasında önemli bir farklılık bulunamamıştır. Fakat daha sonraki günlerde deneme-1 grubunda, diğer gruplara oranla daha fazla yumurta elde edilmiştir (p

Effects of high dose copper addition tofeed of laying hens on egg production, egg-shell weight and egg-shell thickness

The aim of the study was to assess the effect of dietary copper on egg production and egg-shell quality. In this study, 60 White Leghorn hens, 20 weeks of age, were used. The hens divided into two experimental groups and one control group. Each groups included 20 hens. Experimental groups received certain copper addition in their feed, when the control group was given no extra copper in their feed. The collected eggs were analysed in terms of their shell thicknesses and shell weights, parametrically. During the first 42 days (early seven weeks) of the experiment, no significant difference has been observed about the egg yields in between these three groups. But later, experiment-1 group yielded more eggs than did other two groups (p

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