Effect of Mistletoe(Loranthus europaeus jacq.) on Macronutrient Element in oak(Quercus libani) Forests of Ilam Case Study:tangedallab of Ilam)

In this study the effects of mistletoe on five essential elements of the host trees was evaluated. This research was done using analysis of leaf. Mistletoe is observed in Ilam area and often in coppice and standard oak forests, therefore, We selected oak trees that had highest infection rate ,in this study. We selected three stations that have similar condition of diameter, height, shape of crown and infestion rate ,in this study. Treatments included control trees, infested and healthy branches from infested trees(or semi infested) and six healthy tree and six infestion tree were selected. Thus we collected leaves in three treatments in three stations and the samples were taken to laboratory. leaves were dry and grind and level of element was determine and macro element in the soil were studied. Results showed that the amount of phosphor(P) and potassium(K) in infested trees is more than healthy and showed significant differences but for other elements nitrogen( N) ,calssium (Ca) , (Mg) no any significant differences were observed. Also based on the staute table enough limit of elements for potassium(K) and calcium(Ca) in oak trees was higher and nitrogen(N) and phosphour(P) and mangsium(Mg) was less.and showed that trees easily absorbed soil calssium and potassium but transition mangsium, phosphour and nitrogen is lower. .Gaelogy of the area showed that soil OC levels are very high and soil elements is very rich. despite of the high quality of the soil and ability suitable trees in uptake of soil macronutrient mistletoe weakened trees and negative impact on the morphplogy and physiology trees.therefore must be combated.