Chemical composition of leaves walnut: Effect of Nitrogen and Potassium

Persian walnut is one of the most important nut crops originated from central Asia particularly Iran. According latest statistics of FAO Iran with 65,000 hectares under cultivation and produce 170,000 tons of walnuts is fourth largest producer of walnut in worlds. Adding the correct nutrients to the soil has been the highest effect on the growth and yield of walnuts. In order to, factorial experiment in a randomized complete block design with three levels of N (0, 200 and 400 N kg ha-1 Ammonium sulfate) and three levels of Potassium (0, 150 and 300 K kg ha-1 Potassium in four replications was evaluated in the bondar gardeshgari village. . The results showed that Increase of Nitrogen significantly affected concentration of Nitrogen, Phosphorus, Calcium and Micro elements in the leaves. By Increasing Nitrogen application significant increase of Nitrogen, phosphorus, Iron, Manganese, copper and Zinc concentration in the leaves but decreased Calcium and Potassium concentration. By increasing application of Potassium sulfate fertilizer application significant but decreased Calcium and Nitrogen concentration. That’s indicating Antagonist Relationship of these elements.By Increasing Nitrogen application significant increase of Nitrogen, phosphorus, Iron, Manganese, copper and Zinc concentration in the leaves but decreased Calcium and Potassium concentration. By increasing application of Potassium sulfate fertilizer application significant but decreased Calcium and Nitrogen concentration. That’s indicating Antagonist Relationship of these elements.