Fertilization Effects on Allometric Equations and Biomass in a Moso Bamboo (Phllostachys pubescens) Stand

摘要

This study was carried out to determine fertilization effects on allometric equations and biomass production in a Moso bamboo (Phllostachys pubescens) stand of the Gajwa National Experimental Forests, Jinju, Korea. The study site was fertilized for approximately 30 years to produce edible bamboo shoots. Total 20 bamboos (10 fertilized and 10 unfertilized) were cut to develop allometric equations and to estimate biomass accumulation of each bamboo component. Allometric equations of each bamboo component in the fertilized and unfertilized plots were significant (P < 0.05) with diameter at 20 cm from ground (D20), diameter at breast height (DBH), culm height (H), and DBH2H. Aboveground biomass estimated by the allometric equations (DBH) was significantly higher in the unfertilized plots (106.38 Mg ha"1) in culm density of 6,833 culm ha"1 than in the fertilized (57.68 Mg ha"') plots in culm density of 4,633 culm ha". The proportion of each biomass component was culm (79%), followed by branches (14%) and leaf (7%) in the fertilized plots, whereas it was culm (81%), followed by branches (13%), and leaf (6%) in the unfertilized plots. The results indicate that aboveground biomass accumulation in a Phllostachys pubescens stand was little affected by fertilizer application because of the difference of culm density.