Effects of organic and inorganic zinc supplementation in breeder hen rations on performance and egg quality
Abstract
In this study, the
effects of two forms of zinc minerals (organic and inorganic) supplemented to
rations for laying breeder hens were investigated relative to body weight, feed
intake, feed conversion ratio, egg production, external and internal quality of
eggs and egg weight. This 16-week study, which used 216 Barred Rock hens, was
initiated when the hens were 48 weeks old. The animals were fed basal diet
which is consist of 17% crude protein and 2800 kcal/kg metabolisable energy.
The control rations were prepared using a zinc-free mineral mix. The other five
treatments received 60 mg/kg of one of the following zinc supplements:
Availa-Zn’, ZnSO4, Zinc RedoxMin, ZnO and ZnCl2. It is concluded that (1)
Zn-Avila added to rations had negative effects on feed consumption, egg shape
index and eggshell strength; (2) the ZnSO4 supplement had positive effects on
egg shape index, albumen index and Haugh units; (3) the Zn-RedoxMin supplement
had positive effects on egg weight and egg shape index but negatively affected albumen
index and Haugh units; and (4) the ZnCl2 supplement had positive effects on
feed conversion and eggshell strength, but it reduced the value of the index
figure.
Keywords
Kaynakça
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Ayrıntılar
Birincil Dil
İngilizce
Konular
-
Bölüm
Araştırma Makalesi
Yayımlanma Tarihi
15 Haziran 2018
Gönderilme Tarihi
26 Şubat 2018
Kabul Tarihi
4 Nisan 2018
Yayımlandığı Sayı
Yıl 2018 Cilt: 89 Sayı: 2