森林土壤碳库研究方法进展

森林土壤有机碳库是全球碳循环的重要组成部分,其积累和分解的变化直接影响全球的碳平衡,土壤有机碳库研究方法对准确估算土壤碳蓄积,反映土壤肥力,对生物多样性的保护有着重要作用。概述了森林土壤碳储量及其分布,介绍了森林土壤有机碳库的各种估算与测定方法,并就各种方法的特点及优缺点做了进一步的分析,表明各种方法都受条件限制,还有待完善,但用的最多的还是土壤类型法与生命带法,GIS方法近几年才得到应用,模型方法应用较早但还不成熟。针对各种方法估算存在的误差,从提高精度的角度出发,又对估算方法误差做了统计分析。阐述了森林土壤碳释放的测定方法,并对碳释放的一些研究成果做了总结,在此基础上,就目前土壤碳库研究方法上尚存在的一些问题作了概括与分析。参71

Summary of estimated methods on forest soil's carbon pool

Forestry soil organic carbon is an important component of the global carbon cycle,and it has direct effects on the global carbon balance.The estimated methods of soil carbon pool had important function to exactly estimate carbon pool,to reflect soil fertility,to protect biological diversity.This paper particularly summarized carbon reserves and carbon distributing of forestry soil,introduced all kinds of estimated methods on forestry soil's carbon,analyzed character and excellence and disadvantage of each method,indicated each method had its restricted condition and should be improved,methods of soil taxonomy,holdridge zones were most used,method of GIS was used recently,model was early used but was not mature;aiming at error of methods estimated,statistically analyzed error estimated in order to improved precision,finally expounded methods released of forestry soil and summarized harvest on this aspect.On this base,this paper summed up and analyzed existed problem on research methods.