【摘要】 依据生物置标准木104株(27株根量)、解析木403株以及398块标准地的实测材料,对华北北部3个地区的华北落叶松人工林的生物量及生产力进行了分析比较.更多还原

【Abstract】 Based on 104 biomass sample trees (27 root sample trees), 403 stem analysis sample trees and 398 plots, the biomass and net-productivity of the forests were studied. In this paper, analyses of the relations between age and biomass, age and net-productivity, stand density and biomass, age and assimilation rate of the needles were made.更多还原