Biomass Accumulations and the Distribution of Nitrogen and Phosphorus within Three Quercus acutissima Stands in Central Korea

Above- and belowground biomass and nitrogen (N) and phosphorus (P) distribution within three Quercus acutissima stands were investigated in central Korea. The average age (year) and diameter at breast height (DBH, cm) were 10.8 and 7.9 for Stand 1, 38.2 and 17.1 for Stand 2, and 44.0 and 20.7 for Stand 3, respectively. Fifteen trees were destructively harvested for dimension analysis of component biomass (stem wood, stem bark, foliage, branches, and roots) plus N and P concentrations. Total biomass (t ha-¹) was 88.7 for Stand 1, 154.9 for Stand 2, and 278.1 for Stand 3 while N and P contents in all tree components (kg ha-¹) were 483.3 and 52.2, 697.1 and 55.0, and 1113.9 and 83.7.