Document Type : Scientific article
Authors
1
M.Sc. Student of Forestry, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, I.R. Iran.
2
Associate Professor, Department of Forestry, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, I.R. Iran.
3
Ph.D. student of Forestry, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, I.R. Iran.
Abstract
This study aimed to evaluate the effects of Acer Velutinum, Fraxinus excelsior, Quercus castaneifolia, Pinus brutia plantation stands and oak–hornbeam natural stand on soil (physical, chemical and biological) properties in Darabkla forest (parcel 39), North of Iran. To measure the soil physical and chemical properties, 10 points were randomly selected and soil samples were taken at the depth of 0-10 cm using the core method. The buried bag method was used to measure the net nitrogen mineralization rate, which 5 points were randomly selected and soil samples were taken at the depth of 0-5 cm. Finally, the soil moisture content, bulk density, pH, EC, organic carbon, total nitrogen, available potassium and phosphorus, ammonium and nitrate were measured in the laboratory and indices of net nitrogen mineralization, ammonification and nitrification were calculated. The mean comparison results of soil physical, chemical and biological properties showed significant differences between different stands. So that, the highest value of soil pH, potassium and phosphorus were observed in maple plantation stand and the lowest value of soil moisture content, pH and EC were observed in pine plantation stand. In addition, the net nitrogen mineralization was higher in the broadleaves stands than pine stand.
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