晋西油松人工林地上部分生物量与生产力的研究

本文采用样地法和模型研究了晋西油松人工林地上部分的生物量与生产力。研究结果为：（１）油松各类测树指标、地上部分各类营养部分生物量两两之间都有显著关系，但它们与果生物量的关系不显著。（２）ＣＡＲ模型与ＶＡＲ模型的估计效果都较好，但相对来说以ＶＡＲ模型优于ＣＡＲ模型。（３）依据相关指数（Ｒ２），筛选各类生物量估计的最优模型：其中，树干为Ｗｔ＝ａ（Ｄ２Ｈ）ｂ，其他各营养部分为Ｗ＝ａＤｂ。（４）该区油松人工林地上部分生物量与生产力分别为２５．５５０６ｔ／ｈａ和１．１１０９ｔ／ｈａ／ｙ，以干＞枝＞叶＞果。（５）油松人工林地上部分生物量与生产力主要集中在中下部，从基部朝上逐渐减少。

STUDY ON THE ABOVEGROUND BIOMASS AND PRODUCTIVITY OF PINUS TABULAEFORMIS PLANTED FOREST, WEST OF SHANXI PROVINCE

With methods of sampling and model, this paper studies the aboveground biomass and productivity of Pinus tabulaeformis planted forest, west of Shanxi province. The results are those: (1)The relations between each pair of forest measures and biomass are significant, however they are not obviously related to the cone biomass. (2) Both the CAR models and VAR models are good at estimation of the biomass, but the VAR models are better than the CAR models. (3) Depended by the relation index (R 2), the excellent models are selected. The model of Wt=a(D 2H) b is selected for the bole, and the model of W=aD b is used for the others. (4) The aboveground biomass and productivity of the Pinus tabulaeformis planted forest are 25.5506t/ha and 1.1109t/ha/y respectively in this region. And, the distribution rank is that:bole>branch>leaf>cone.(5) The most of biomass and production focus in the middle-low part, and decreases with height.