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

Authors : Yalçin Bozkurt, Eumorfia Zachou

Pages : 59-72

View : 6 | Download : 12

Publication Date : 1999-12-15

Article Type : Research Paper

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.