ENGİN YENİCE, Cengizhan MIZRAK, NECMETTİN CEYLAN, Turgay YILDIZ, Meltem GÜLTEKİN, Zafer ATİK

Effects of dietary sodium bentonite and mannan oligosaccharide supplementation on performance, egg quality, blood and digestion characteristics of laying hens fed aflatoxin contaminated diet

Bu araştırmada, yaklaşık 120 ppb toplam afatoksin (AF) içeren yumurta tavuğu yemlerine sodyum bentonit (SB) (%0.5 ve %1) ve mannan oligosakkarit (MOS, %0.1) ilavesi yapılmış, bu gruplar AF bulaşık negatif kontrol (NC) ve AF içermeyen kontrol (C) grupları ile karşılaştırılmıştır. Barred Rock hattından 26 haftalık yaşlı toplam 180 adet tavuk 12 hafta süresince denenmiştir. Gruplar arasında yaşama gücü, yem tüketimi, yem değerlendirme oranı, yumurta sarısı kırmızılık değeri (a*) haricindeki yumurta kalite kriterleri ve kan parametreleri bakımından önemli farklılıklar gözlenmemiştir. Yumurta ağırlığı, yumurta kütlesi ve canlı ağırlık kazancı NC de, C ile karşılaştırıldığında azalmıştır. İlave edilen %0.5 SB (SB-1) yumurta verimi ve kütlesini NC ve MOS gruplarına göre artırmıştır. İlave edilen %1 SB (SB-2) yumurta kütlesini NC grubuna göre artırmıştır. Afatoksin bulaşık yem (NC) C ile karşılaştırıldığında a* değerinde önemli bir azalmaya sebep olmuştur. Hiçbir grubun yumurtasında afatoksin tespit edilmemiştir. Dışkı pHı NC grubunda, C, SB-1 ve SB-2 gruplarından daha yüksek ve MOS grubu ile benzerdir. Dışkı kuru madde oranı C grubunda, NC grubundan daha yüksektir. Sonuç olarak, bir toksin bağlayıcı ajan olarak SB yumurta tavuklarında AFnin zararlı etkilerini önlemede MOSdan daha etkili görünmektedir.

Aflatoksin içeren yumurta tavuğu yemlerine sodyum bentonit ve mannan oligosakkarit ilavesinin performans, yumurta kalitesi, kan ve sindirim özelliklerine etkileri

In this experiment, sodium bentonite (SB) (0.5% and 1%) and mannan oligosaccharide (MOS, 0.1%) were fed to laying hens each receiving approximately 120 ppb total afatoxin (AF), and were compared to AF contaminated negative control (NC) and control without AF (C) groups. A total of 180 hens at 26 weeks of age from Barred Rock were tested for 12 weeks. No significant diferences in liveability, feed intake, feed conversion ratio, egg quality characteristics except for egg yolk redness (a*) and blood parameters were observed among the groups. When compared NC with C, egg weight, egg mass and body weight gain were decreased. The addition of 0.5% SB (SB-1) increased egg production and egg mass compared to NC and MOS. The addition of 1% SB (SB-2) increased egg mass compared to NC. The AF contaminated diet (NC) caused a significant decrease in a* compared to C. Afatoxin was not detected in eggs obtained from any of the treatments. Faeces pH was higher in NC than in C, SB-1 and SB-2 and similar to that of MOS. The proportion of dry matter of the faeces in C was higher than that of NC. As a result, SB appears to be more efective than MOS as a toxin-binding agent in counteracting the adverse efects of AF in laying hens.

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