山西三道川林场主要森林生态系统生物量和生产力研究

Research on Community Biomass and Productivity of Different Forest Ecosystems in Sandaochuan Forest Farm of Guandi Mountain

基于森林生态系统对区域碳库的杰出贡献,对维持生态平衡和减缓气候变化的巨大作用,以关帝山林区的油松林、白桦林、山杨林、落叶松人工林、油松封育林、灌木林和裸露荒坡地等主要生态系统为研究对象,对其生物量和生产力进行了初步探讨,并在生物量和生产力分析的基础上对该区森林经营提出了森林生物量和生产力的分类区划经营意见。结果表明:(1)不同生态系统具有不同的总生物量,其基本排序如下:白桦林>油松林>油松封育林>落叶松人工林>山杨林>灌木林>荒山坡;(2)不同生态系统具有不同的生物量分布格局;(3)不同森林群落具有不同的生产力,采用方精云的生物量与生产力的推算方法得到各林分生产力排序如下:山杨林>落叶松人工林>油松林>油松封育林>白桦林;(4)采用刘世荣等提出的森林生产力与主要气候因子之间的关系公式得到限制该区森林生产力的主导因素是降水,而非温度。

Based on the great distribution of forest ecosystems to regious carbon bank, to maintaining ecosystem balance , and to buffering the climate change, we discussed the community biomass and productivity of different ecosystems, we chose the pinus, birch, populus, larch, enclosing pinus, shrub and abandoned hill as the research objects, and the area of the sampling is about 25. 82 m× 25. 82 m. The calibrating method of the biomass is harvesting. The calibrating method of the productivity is to use the annual average productivity of community. The result showed： （1） Different ecosystems have different biomasses, it shows the follwing order： Birch 〉pinus 〉enclosing pinus 〉larch〉 populus 〉shrub〉abandoned hill. （2） Different ecosystems have different biomass distribution patterns. Five type of forest distribute the most of the biomasses in the stem of the tree, which is the economical part. The other biomasses are mainly distributed in the litter story, and the shrub story and the herb story share only a little of the biomass. These are the typical character of the temperate forests. （3） The productivity of the ecosystem has the following order： Birch 〉pinus 〉 larch 〉 enclosing pinus 〉populus. （4） After analyzing the relationship between productivity and main climate factors by the method provided by Liushirong, we conclude that the main limited factor is not temperature but precipitation.