The Effects of Zinc, Manganese and Copper on Potato Yield and Leaf and Tuber Concentrations of Phosphorus and Iron

Potato is one of the most important tuberous crops. To achieve optimum yield in potato، suitable brand and sufficient and balanced soil nutrients are necessary. In order to study the effects of Zinc، Manganese and Copper on potato yield and leaf and tuber concentrations of Phosphorus and Iron، a factorial pot experiment with 32 treatments was conducted in greenhouse of Soil Science Department، Zanjan University، using a completely randomized design and three replications. The study factors were four levels of Zinc (Zn0:1. 14، Zn1:5، Zn2:10 and Zn3:15 mg/kg soil)، four levels of Manganese (Mn0:1. 4، Mn1:5، Mn3:10 and Mn4:20 mg/kg soil) and two levels of Copper (Cu0:0. 22 and Cu1:2 mg/kg soil) which were applied to the soils of planting pots. The results showed that potato yield increased as the soil concentrations of Zinc، Manganese and copper increased to certain levels Soil application of zinc and manganese fertilizers significantly decreased leaf and tuber concentrations of Phosphorus and Iron. Soil application of copper decreased Iron concentration of leaf but not Phosphorus. The highest potato yield was obtained from the treatment of 15، 10 and 2 mg zinc، manganese and copper per kg of soil، respectively.