Konya merinosu kuzularda rasyona çinko ve bakır ilavesinin canlı ağırlık kazancı, rumen protozoonları ve yapağı kalitesine etkisi

Bu çalışmada, 24 erkek merinos kuzuda rasyona çinko ve bakır ilavesinin, canlı ağırlık kazancı, rumen protozoonlan ve yapağı kalitesine etkisi araştırıldı. Hayvanlar kontrol, Zn, Cu ve Zn+Cu olmak üzere 4 eşit gruba ayrıldı. Altı ay boyunca, kontrol grubu kuru maddesinde 40 mg/kg çinko ve 9 mg/kg bakır içeren rasyonla beslenirken, diğerleri kuru maddesinde sırasıyla 250 mg/kg çinko, 25 mg/kg bakır ve 250 mg/kg çinkoile kombine 25 mg/kg bakır içeren rasyonlarla ad libitum olarak beslendiler. Deneme süresince hayvanlardan l 'er ay aralıklarla rumen sıvısı örnekleri alındı ve hayvanların canlı ağırlıkları ölçüldü. Çalışma sonunda yapağı kalitesi ile ilgili parametrelerle, yapağı çinko ve bakır düzeyleri belirlendi. Zn ve Zn+Cu gruplarındaki hayvanların rumen sıvısı ve yapağı çinko düzeyleri kontrol ve Cu gruplarınkinden daha yüksekti. Zn, Cu ve Zn+Cu gruplarının rumen içeriği pH değerleri kontrol grubununkinden daha düşüktü. Cu grubu hayvanlardaki aynı değer, 1. ay dışında Zn grubundakilerden, 3-6. aylarda ise Zn+Cu grubundakilerden daha düşüktü. Cu grubunun ortalama yapağı bakır düzeyi, kontrol ve Zn gruplarınınkiyle karşılaştırıldığında daha yüksekti. Zn+Cu grubunun aynı değeri ise Zn grubununkinden daha yüksekti. Bakır grubunun ortalama lif elastikiyeti diğer gruplannınkinden daha düşüktü. Bununla birlikte, bu çalışmada rasyona çinko ve/veya bakır ilavesi, kuzuların canlı ağırlık kazancı, rumen protozoonlannın sayısı ile lif inceliği, uzunluğu ve mukavemeti gibi parametrelerde önemli bir değişikliğe neden olmadı.

Effects of dietry zinc and copper supplementation on live weight gain, rumen protozoa and wool quality in Konya merino lambs

In this study, effects of supplementation of zinc (Zn) and copper (Cu) to the diet on body weight gain, rumen protozoa and wool quality of 24 male merino lambs were investigated. The animals were equally divided into four groups as control, Zn, Cu, Zn+Cu. During 6 months, while control group was fed the control ration included 40 mg Zn/kg diet and 9 mg Cu/kg diet in dry matter (DM), the others were fed the rations included Zn (250 mg /kg in DM), Cu (25 mg /kg in DM) and Zn plus Cu (250 mg Zn/kg, 25 mg Cu/kg in DM) respectively, as ad libitum. The rumen fluids were taken and body weight were measured in the animals at 1 month intervals during the experimental period, at the end of the experiment Zn and Cu levels in wool and the parameters about wool quality of the lambs were determined. The rumen fluid and wool Zn levels of the Zn and Zn+Cu groups were higher than those of the control and Cu groups. The pH values of rumen contents in the lambs of the Zn, Cu and Zn+Cu groups were lower than in the control group. The same value in the Cu group was lower than in the Zn group, except 1st month, and in the Zn+Cu group at the 3rd to 6th months. The mean Cu level in the wool of the Cu group were higher as compared with those in the control and Zn groups. The same parameter of Zn+Cu group was also higher than in Zn group. The mean fibre elasticity of Cu group was lower than in other groups. However, Zn and/or Cu supplements to the diets in this study did not significantly affect to body weight gain, rumen protozoa counts, fibre diameter, stable length and fibre strength values of the lambs.

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