굴참나무천연림의 생산구조 및 물질생산력에 관한 연구 = A Study on the Production Structure and Biomass Productivity of Quercus variabilis Natural Forest

다국어 초록 (Multilingual Abstract)

Growth and biomass production of natural stands of Quercus variabilis in relation to tree density were studied to obtain basic guide lines for future tending operation. Two natural stands of Quercus variabilis located at 900m (A stand: 6,600trees/㏊, 15.84㎡/㏊, 19/17-20) and 800m (B stand: 4,300trees/㏊, 16.65㎡/㏊, 20/17-21) elevation in Sancheong, Kyongnam Province were selected for the comparative study and following results were obtained through a sample plot method, After diameter of individual trees in the sample plots was measured, twelve average trees from each diameter class were cut felled to measure dry weight of W_S, W_B, W_L, W_(Ba), and standing biomass and biomass production rates by a allometrior regressions related to D²H. Vertical distribution of leaves along the stems indicated that photosynthesis was carried out 2.2m above the ground in Stand A and 1.2m in Stand B. Maximum photosynthesis was located 4.2m and 6.2m above the ground in Stand A and B, respectively. Leaf area index was 4.25㏊/㏊ for Stand A, and 3.89㏊/㏊ for Stand B. Above-ground standing biomass was 49.51 ton/㏊ for Stand A and 59.20 ton/㏊ and net annual production was 6.75 ton/㏊/yr. for Stand A and 8.99 ton/㏊/yr for Stand B. The ratio of net annual production to standing biomass was 17.5% for Stand A and 16.7% for Stand B. Net assimilation rate was 2.75㎏/㎏/yr. for Stand A and 3.58㎏/㎏/yr.for Stand B. Stem wood production rate was 1.46㎏/㎏/yr. for Stand A and 2.09㎏/㎏/yr. for Stand B. Bark production rate was 0.60 ㎏/㎏/yr. for Stand A and 0.34㎏/㎏/yr. for Stand B. Above data indicated that Stand B utilized growing spaces and sites more efficiently than Stand A. It is concluded chat productivity of natural stands of Quercus variabilis can be enhanced through optimization of basal areas and number of tree per hectare and that sound management of natural oak stands should be based on systematic: sampling of the area for periodic productivity estimation.