جستجوی مقالات مرتبط با کلیدواژه « مشخصه های فیزیکی و شیمیایی خاک » در نشریات گروه « جنگلداری »

The aim of this study was to investigate some of the most important ecological features of the Hackberry trees in Guilan forests. Data was collected using 25 and 20 plots (Rezvanshahr and Tanean sites, respectively) based on the presence and absence of Hackberry. The inventory was selective sampling method. A circular sample plot with an area of ​​1000 m2 was used. Some geographical and ecological characteristics of each sample plot and some quantitative factors of the Hackberry trees were recorded. Soil samples were collected from the center of all plots at the depth of 0-30 cm. The results revealed that the average diameter and height of Hackberry trees in the south aspect of Tanean was more than Rezvanshahr site, and significant differences were observed between two sites. But there was no significant difference in other aspects. Highest percentage presence of Hackberry trees was on slope ranges from 31% to 50%. In addition, the results showed that the values of nitrogen, organic carbon and organic matter were positively correlated with Hackberry, and Cation Exchange Capacity (CEC) and P were negatively correlated with them.