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The present study has aimed to determine the effects of zinc (Zn) and copper (Cu) supplements to the ration on some haematological parameters in Konya merino lambs. For this purpose, total of 24 male Merino lambs were equally divided into 4 groups as control, Zn, Cu and 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 added Zn (250 mg/kg in DM), Cu (25 mg/kg in DM) and Zn plus Cu (250 mg Zr./kg and 25 mg Cu/kg in DM) respectively, as ad libitum. The blood samples were taken from v.jugularis at 1-month intervals in the same period. The plasma Zn levels of the Zn and Zn+Cu groups were higher than those in the other groups at all of the sampling times. The plasma Cu level of the Cu group was higher than those in the control at 3-6 months and in the Zn group at 2-6"1 months. The erythrocyte count of the Zn group was higher than those of the other groups at the 2n^ month. The haemoglobin amounts in the Cu and Zn+Cu groups increased compared to those in the control group at the 2nc^ and 3rd months. The haematocrit value of the Cu group rose according to values of the group at 2n months. In addition, at the 2ncl month of the study, the mean corpuscular volume of the Zn group was lower than those İn the other groups. But, there were no significant effects of Zn and/or Cu supplements on other investigated parameters.
The results of this study suggest that it's beneficial in determination of changes occurring after the zinc and/or copper supplementation to the ration on some haematological parameters and to be used as a source in prospective investigations.