Biomass Productivity of Acacia mangium Plantations of Different Age Classes
An experiment was conducted to study the biomass productivity of Acacia mangium plantations of different age classes (4,7 and 11 years old). Results showed that the biomass of A. mangium plantations increased with stand age. The biomass accumulations of 4, 7 and llyears old A. mangium plantations were 63.06, 169.22 and 213.44t · hm-2, respectively , including 28.41, 89.81 and 122.83t · hm-2 · a-1 of stem biomass, and 15.765, 24.174 and 19.404t · hm-2 · a-1 of net productivity of arbor trees. A similar changing tendency of understory vegetation biomass was also found. The proportion of stem biomass increased with stand age, while the biomass of leaf, bark, 1-year-old branch, dead branch and coarse root showed decreasing tendencies.
NETL
NSTL
万方数据
维普
