Abstract

Koyunlarda kadmiyum uygulamasının yemlerin sindirilebilirliği ve alımı ile kadmiyumun (Cd) gastrointestinal emilimi üzerindeki etkisini incelemek amacıyla bir deneme yürütülmüştür. Denemede yirmi dört (24) Galler Dağ koyunu kullanılmıştır. Koyunlar ağırlıklarına göre altı gruba ayrılmış ve rastgele dağıtılmıştır. Her blok için ortalama hayvan ağırlığı sırasıyla 50.1, 47.9, 46.7, 45.0, 40.4 ve 38.9 kg idi. Her muamelenin 12 tekrarı vardı. Kadmiyum ile kontamine edilmiş ot üretilmiştir. Muamele 1, kadmiyum içeren çim ve 200 g konsantre yemden ve Muamele 2, Cd içermeyen çim ve 5 mg Cd içeren 200 g konsantre yemden oluşmuştur. Hayvanlar ilk 15 günü adaptasyon dönemi olmak üzere otuz gün boyunca metabolizma kafeslerinde tutulmuştur. Adaptasyon dönemi boyunca ot ad libitum olarak verilirken, günde yaklaşık 200 g konsantre yem sunulmuştur. Uygulamaların toplam kuru madde yem alımı üzerinde önemli (P <0.05) etkileri olmuştur. Ancak, kadmiyumun kuru madde sindirilebilirliği üzerindeki etkisi neredeyse istatistiksel anlamlılığa ulaşmıştır (P=0.06). Kadmiyum dışkıda çoğunlukla ikinci ve üçüncü günde ortaya çıkmıştır ve bu da önceki raporları doğrulamıştır. Kadmiyum emilim oranı, kadmiyum tayinlerinde sodyum ile girişimler nedeniyle hesaplanmamıştır. Mevcut ekipmanın (Atomik Absorpsiyon Spektrofotometresi, AAS-model 151) spesifik olmayan tüm absorpsiyonlar için arka plan düzeltmesi yoktu.

Keywords

• Heavy metals
• cadmium
• dry matter intake
• digestibility
• absorption.

Bir Ağır Metal Olarak Kadmiyum Uygulamasının Koyunlarda Kuru Madde Alımı, Sindirilebilirliği ve Kadmiyum Emilimi Üzerine Etkisi

Abstract

An experiment was conducted to examine the effect of cadmium on digestibility and intake of feeds and the gastrointestinal absorption of cadmium (Cd) application in sheep. Twenty four (24) Welsh Mountain ewes were used in the experiment. The ewes were blocked into six groups by weight and allocated at random. The average animal weight for each block was 50.1, 47.9, 46.7, 45.0, 40.4 and 38.9 kg, respectively. Each treatment had 12 replicates. Grass contaminated with cadmium was produced. Treatment 1 consisted of grass with cadmium plus 200 g concentrates and Treatment 2, the Cd-free grass and 200 g concentrates containing 5 mg of Cd. Animals were kept in metabolism crates for thirty days, the first 15 days being an adaptation period. During the adaptation period grass was fed ad libitum while approximately 200 g of concentrates were offered daily. There were significant (P <0.05) effects of the treatments on the total dry matter feed intake. However, cadmium effect on dry matter digestibility almost reached statistical significance (P=0.06). Cadmium came out in the faeces mostly on the second and third day, which has confirmed the previous reports. The absorption rate of cadmium was not calculated due to interferences with sodium in the cadmium determinations. The available equipment (Atomic Absorption Spectrophotometer, AAS-model 151) had no background correction for all non-specific absorption.

Keywords

• Heavy metals
• cadmium
• dry matter intake
• digestibility
• absorption.

Supporting Institution

SELÇUK ÜNİVERSİTESİ

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