中国陆地土壤有机碳蓄积量估算误差分析

摘要/Abstract

摘要： 简要介绍了土壤碳蓄积量的计算方法,包括土壤类型法、植被类型法、生命地带法、相关关系法和模型方法,以及土壤有机碳蓄积量的误差分析方法.根据中国第二次土壤普查2473个典型土种剖面数据,采用土壤类型法和两种碳密度方法计算,估算的中国陆地土壤有机碳蓄积量处于615.19×10¹⁴～1211.37×10¹⁴g之间,平均碳密度为10.49～10.53kg·m^-2(土壤厚度为100cm)或11.52～12.04kg·m^-3(土壤平均厚度为88cm),土壤平均碳蓄积量为913.28±298.09×10¹⁴g,估算的不确定性在20%～50%之间.其中,土壤碳计算和采样数量的差异是导致土壤碳蓄积量估算不确定性的重要因素.

关键词: 土壤有机碳蓄积量, 碳循环, 土壤碳循环

Abstract: The paper summarizes different estimating methods of soil organic carbon (SOC) storage including methods of soil taxonomy, vegetation types, Holdridge zones, correlative relationship and modeling. The error analysis of SOCcalculation was introduced. Based on second national soil survey 2473 soil profiles, adopting soil taxonomy method and two kinds of SOCdensity, the terrestrial SOC storage in China was estimated. The range of SOC storage in China is between 615.19 and 1211.37×10¹⁴ g and the average SOCdensity is between 10.49～10.53 kg·m^-2 (for average soil depth of 100cm) or 11.52～12.04 kg·m^-3 (for average soil depth of 88cm). Through estimation and error analysis, the average SOC storage is about 913.28±298.09×10¹⁴ g and the uncertainty is among 20%～50%. Results showed that the differences of SOC estimation and sampling methods are important factors of SOCestimating uncertainties.

Key words: Soil organic carbon storage, Carbon cycle, Soil carbon cycle

中图分类号:

P467
S159.2

王绍强, 刘纪远, 于贵瑞. 中国陆地土壤有机碳蓄积量估算误差分析[J]. 应用生态学报, 2003, (5): 797-802.

WANG Shaoqiang, LIU Jiyuan, YU Guirui. Error analysis of estimating terrestrial soil organic carbon storage in China[J]. Chinese Journal of Applied Ecology, 2003, (5): 797-802.

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