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地球科学进展  2003, Vol. 18 Issue (4): 609-618    DOI: 10.11867/j.issn.1001-8166.2003.04.0609
研究论文     
中国土壤有机碳库量与农业土壤碳固定动态的若干问题
潘根兴,李恋卿,张旭辉,代静玉,周运超,张平究
南京农业大学农业资源与生态环境研究所,江苏 南京 210095
SOIL ORGANIC CARBON STORAGE OF CHINA AND THE SEQUESTRATION DYNAMICS IN AGRICULTURAL LANDS
Pan Genxing, Li Lianqing, Zhang Xuhui, Dai Jingyu, Zhou Yunchao, Zhang Pingjiu
Institute of Resource, Ecosystem and Environment of Agriculture,Nanjing Agricultural University, Nanjing  210095,China
 全文: PDF(149 KB)  
摘要:

在整理和统计国内对土壤有机碳及其变化的文献资料基础上,着重讨论中国土壤有机碳库及其分布、不同时期土壤有机碳的变化以及最近时期有机碳的固定趋势,分析我国不同土壤有机碳的保护机制的特点,期望对于我国当前土壤有机碳库与全球变化研究提供参考依据。我国总土壤有机碳库的估计在50~180 Pg之间。估计我国表层土壤有机碳库为20 Pg,它主要分配于几个与湿地和水成过程有关的土壤类型,且水稻土占有较大比例。因而我国人为土的管理在陆地生态系统碳循环与全球变化上有重要意义。

关键词: 中国土壤土壤有机碳库农业土壤碳固定碳循环    
Abstract:

An estimation of soil organic carbon (SOC) pool and understanding of the sequestration dynamics is being one of the research foci for a country or a region to setup the total emission budget. By synthesizing and analyzing statistically the SOC data at different spatial level and temporal durations all over China, the SOC storage and distribution over geographical regions and soil types was presented, the recent C sequestration in agricultural soils was demonstrated, and uncertainty of C sequestration mechanisms was discussed in this paper. The estimates of total SOC pool of China’s soil ranged from 50 Pg to 185 Pg by various estimation methodologies. Surface SOC pool was estimated being 20 Pg by the author, of which one half was found in the soils largely with hydro-morphic formation or wetland origin. Paddy soil as an important anthropogenic soil played a unique role in C storage as they had a quite high C density. C sequestration trend since the 1980’s could be depicted by nationwide soil monitoring data although decreasing of SOC during 1950-1980 was argued. Hydragric cultivation, regional soil resilience and soil conservation technologies such as straw return and crop rotation had made significant contribution to the C sequestration rate of over 50 Tg/aof China. Clay protection could not account for SOC retention in various kinds of soils from China. SOC distribution, transformation and retention by soil micro-aggregates of different size ractions could be a topic for urgent research for dealing with SOCstorage and the effectson sink of the increasing atmospheric CO2.

Key words: China soils    C sequestration in agricultural soils    C cycling    Organic carbon pool.
收稿日期: 2002-07-22 出版日期: 2003-08-01
:  S153.6  
基金资助:

国家自然科学基金重点项目“中国主要水稻土有机碳的固定机制、稳定性与碳汇效应”(编号:40231016)资助.

通讯作者: 潘根兴     E-mail: gxpan@jlonline.con
作者简介: 潘根兴(1958-),男,浙江浦江人,教授,主要从事土壤碳循环与全球变化研究·E-mail:gxpan@jlonline.con
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引用本文:

潘根兴,李恋卿,张旭辉,代静玉,周运超,张平究. 中国土壤有机碳库量与农业土壤碳固定动态的若干问题[J]. 地球科学进展, 2003, 18(4): 609-618.

Pan Genxing, Li Lianqing, Zhang Xuhui, Dai Jingyu, Zhou Yunchao, Zhang Pingjiu. SOIL ORGANIC CARBON STORAGE OF CHINA AND THE SEQUESTRATION DYNAMICS IN AGRICULTURAL LANDS. Advances in Earth Science, 2003, 18(4): 609-618.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2003.04.0609        http://www.adearth.ac.cn/CN/Y2003/V18/I4/609

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