Site and Growth Characteristics of Betula costata Growing at Joongwangsan(Mt.) in Pyungchang-gun, Kangwon-do

摘要

The objective of this study was to investigate the site and growth characteristics of Betula costata growing in the natural stands of Mt. Gariwang and Mt. Joongwang area located in Pyungchang-gun, Kangwon-do. B costata was mainly distributed at the rather steep slope and aspect facing from northeast to northwest, and altitudes ranging from 1,000 to 1,200m. It grew on the moist and nutrient rich soils with deep A horizon. Major associated species in the upper stories were Acer pictum, Acer mandshuncum, Quercus mongolica and Cornus controversa. The mean annual height growth of B. costata distributed at relatively low altitudes of 1,000m was 1.5m, which was the best compared with other altitudes such as between 1,200m and 1,350m. Annual volume growthsof B. costata at the altitudes of 1,000m, 1,200m and 1,350m were 0.021m~3, 0.008m~3 and 0.006m~3, respectively. B costata growing at 1,000m also showed better annual volume growth than those at other altitudes(l,200m and 1,350m). B. costata at age of 65in 1,000m altitude showed the highest total average volume growth of 0.008m3 while those in 1,200m and 1,350m altitudes were 0.005m~3 and 0.004m~3, respectively.