ŞAHİN ÇADIRCI, GONCA ÖZMEN ÖZBAKIR, AYFER BOZKURT KİRAZ

Yüksek Oranda Metiyonin Kullanımının Farklı Canlı Ağırlıktaki Yumurta Tavukları Performans Değerlerine Etkisi

Bu çalışmada farklı canlı ağırlığa sahip yumurta tavuk rasyonlarına yüksek oranda metiyonin ilavesinin performansa olan etkileri araştırılmıştır. Denemede 61 haftalık yaşta, 132 adet yumurta tavuğu kullanılmıştır. Yumurta tavukları vücut ağırlıklarına göre eşit sayıda iki gruba (hafif ve ağır) ayrılmış ve bu gruplar rasyonda sadece metiyonin seviyesinin farklı olduğu üç yemleme rejimine tabi tutularak 3x2 faktöriyel deneme desenine göre araştırma yürütülmüştür. Geleneksel soya fasulyesi küspesi ve mısır temel alınarak hazırlanan rasyonlar; %16,5 ham proteine sahip pozitif kontrol (%0,33 metiyonine) veya kontrol rasyonunun %1,00 ya da %1,50 metiyonin ile desteklenmesinden oluşmaktadır. Gruplar ard arda gelen on haftalık üretim döneminde serbest olarak beslenmişlerdir. Her iki ağırlık grubunda da yumurta verimi, yumurta ağırlığı, yumurta kütlesi, günlük yem tüketimi ve yemden yararlanma oranı bakımından yemleme rejimleri arasında önemli fark bulunmamıştır (P>0,05). Bu çalışma sonuçları kanatlı beslemede yaygın olarak kullanılan metiyoninin rasyonda yüksek oranda bulunması durumunda yumurta tavuklarının dikkate değer toleransa sahip olduğuna işaret etmektedir.

Effect of Excess Dietary Methionine on the Performance of Laying Hens of Various Live Body Weight

An experiment was conducted with laying hens to determine the effects of feeding excesses of methionine in a practical layer diet. One hundred and thirty two laying hens at 61 weeks of age were used for the experiment. Two body weight groups (light and heavy) and three levels of mehionine were assigned to six groups of laying hen in a 2x3 factorial design. The diets were a 16.5% crude protein corn and soybean meal positive control diet (0.33% methionine), and this diet fortified with 1.00% additional DL-Methionine or 1.50% additional DL-Methionine. The diets were fed ad libitum to the hens for 10 consecutive weeks of production. For the total production period, body weight gain, henday egg production, egg weight, egg mass, daily feed intake and feed conversion ratio were not significantly different among any of the treatments in the two body weight groups (P>0.05). The study indicated that considerable tolerance exists in laying hens for individual excesses of the DL-Methionine commonly used as supplement in poultry diets.

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