İstilacı Ailanthus altissima (Mill.) Swingle (Simaroubaceae) Türünün Yaprak N ve P Rezorbsiyonu

Abstract

In this study, leaf N and P resorption levels of invasive Ailanthus altissima (Mill.) Swingle species were investigated. For this goal, leaf and soil samples were collected during the vegetation period. Thus, it was aimed to determine the amount of N and P elements from the leaves and their relationships with some soil properties. Forests in the Hendek district of Sakarya province which are affected by disturbance and species is gradually spread have been selected as the study area. Leaf and soil samples were collected every month during the vegetation period. The green and senescence periods of the species were determined by using N and P analyzes in the leaf samples taken and the resorption amounts were calculated. In addition, N and P contents, pH and electrical conductivity values of soil samples were measured and their relationships with resorption levels were explained. According to the findings, the N resorption ability of the species was found to be high and P resorption ability was close to the limit values. In addition, it was found that different soil properties (nutrient content, pH and electrical conductivity) did not adversely affect N and P resorption levels. As a result, A. altissima can be developed in areas with low nutrient content, different pH and electrical conductivity values, and so species can be used in plantation studies. Beside the abundance of litter with high nutrient content also enables the soil to enrich in N and P.