浙江省土壤有机碳密度与储量的初步研究

摘要

为正确评价土壤在陆地生态系统碳循环以及全球变化中的作用，运用土壤类型法和GIS估算法对2009-2012年间所采集的145个土壤剖面调查资料进行分析，对土壤类型法与GIS估算法的优劣进行比较，并系统研究了浙江省土壤碳库。结果表明，浙江省陆地土壤碳库约为0.81～0.83 Pg，平均碳密度约为8.08～8.37 kg· m-2，不同类型土壤的有机碳密度差异较大。浙江省土壤有机碳密度以金衢盆地至台温沿海的东南向条带状区域为低值中心，并沿向北、向西、向南3个方向增加。%Soil is the core of terrestrial ecosystem .Investigations into soil carbon ( C) pool would clarify the role of soil in terrestrial ecosystem C cycle and global change .In the present study , 145 soil profile data collected from 2009 to 2012 were analyzed by soil type and GIS method to estimate the soil C pool in Zhejiang Province .The total amount of soil organic carbon ( SOC) in Zhejiang Province was about 0.81~0.83 Pg, and the average soil carbon density was 8.08~8.37 kg· m-2 .The SOC density varied within soil types .The lowest SOC density was shown as a south-east strip from Jinqu Basin to Taizhou-Wenzhou costal area , and the SOC density increased gradually outward to the north, west and south.Finally, the advantages and disadvantages of soiltype and GIS-estimation method in SOC eval-uation were compared .