Changes in Soil Chemical Properties after Thinning in Quercus acuta stand

摘要

This study was carried out to investigate the changes in soil chemical properties after thinning for a Quercus acuta stand in Wan-do Arboretum, Jeollanam-do. The stem density after thinning was determined referring to that of Quercus acutissima with 10 cm diameter at breast height and soil samples were collected 7 years after thinning. There was no considerable difference in soil pH values after thinning. However, the concentrations of soil organic matter, total nitrogen and available phosphorus significantly increased after thinning. In addition, thinning significantly increased cation exchange capacity (C.E.C) and the concentrations of exchangeable cations (K~+, Na~+, Ca~(2+), and Mg~(2+)). From this study, it was revealed that the nutrient concentrations of this study site were generally lower than those of other forest soils. Therefore, it is needed to improve the warm temperate forests through thinning and to develop forest treatment for regeneration.