论文部分内容阅读
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。
In this paper, the biomass and productivity of aboveground section of Pinus tabulaeformis plantation in western Shanxi were studied by plots method and model. The results are as follows: (1) There is a significant relationship between various tree-measuring indices of Pinus tabulaeformis and the biomass of various nutrients in above-ground parts, but their relationship with fruit biomass is insignificant. (2) The CAR model and the VAR model have better estimation results, but the VAR model is better than the CAR model. (3) Based on the correlation index (R2), the optimal models of biomass estimation were screened: Among them, the trunk is Wt = a (D2H) b, and the other nutrients are W = aDb. (4) The aboveground biomass and productivity of Pinus tabulaeformis plantation in this area were 25.5506 t / ha and 1.1109 t / ha / y, respectively, with dry> branches> leaves> fruit. (5) The aboveground biomass and productivity of Pinus tabulaeformis plantation mainly concentrated in the middle and lower parts, and gradually decreased from the base upwards.