摘要
在全国多目标区域地球化学调查获得土壤高密度和大数据量碳分布数据基础上,提出"单位土壤碳含量"概念和建立土壤碳储量实测计算方法,为精确计算土壤碳储量和估算土壤碳库提供了新的途径。依据"单位土壤碳含量"进行土壤碳储量实测计算,可以按照土壤类型、土地利用分类、生态系统及自然景观等任意划分方式,从不同途径取得市县、省区、流域及至国家土壤碳储量,并在各级次上进行土壤碳库问题研究,解决土地利用、农业种植和环境评估中的实际问题。文章以江苏、湖南、四川、吉林、内蒙古为例进行土壤有机碳储量计算,结果表明,全国土壤碳储量分布不均匀。按照土壤有机碳储量和土壤平均有机碳储量分布,四川省四川盆地西部区土壤有机碳储量为1779887583t,平均有机碳储量最高,为29107.86t/km2;依次为:吉林省平原区有机碳储量2618973357t,平均有机碳储量27427.25t/km2;湖南省洞庭湖区有机碳储量837159672t,平均有机碳储量21977.31t/km2;江苏省有机碳储量1818603526t,平均有机碳储量17117.61t/km2;内蒙古河套地区有机碳储量286247058t,平均有机碳储量9592.73t/km2。
Based on the huge amount of soil carbon data high densely obtained by national multi-purpose regional geochemical survey the concept of unit carbon content was put forward and the measurement calculation method of soil carbon reserves was set up. This provided a new approach to calculate soil carbon reserves accurately and estimate soil carbon pool. Based on the concept of unit carbon content we can calculate soil carbon reserves using regional survey data according to soil type, land use, ecosystem, natural landscape, and any other classification system respectively so as to achieve soil carbon reserves at county, provincial, and national levels, which can be used to solve soil carbon pool problems on land use, agricultural levels. This paper lists the calculation results of soil carbon cultivation, and environmental assessment at different reserves from Jiangsu, Henan, Sichuan, Jilin Provinces and Inner Mongolia. It is clear that soil carbon reserves is in homogenous at the national level. Soil organic carbon reserves in west Sichuan Basin of Sichuan Province is 1779887583t and its average soil organic carbon reserves is 29107.86t/km^2. Soil organic carbon reserves and average soil organic carbon reserves in other regions are listed in the following ：Jilin Province ,2618973357t and 27427.25t/km^2 ; Henan Province ,837159672t and 21977.31t/km^2 ; Jiangsu Province, 1818603526t and 17117.61t/km^2 ; Inner Mongolia,286247058t and 9592.73t/km^2.
出处
《第四纪研究》
CAS
CSCD
北大核心
2008年第1期58-67,共10页
Quaternary Sciences
基金
多目标生态农业地球化学调查(批准号:基[2004]012)
湖南省洞庭湖区1∶25万多目标区域地球化学调查(批准号:基[2003]014-01)
江苏省国土生态地球化学调查(批准号:水[2003]019-01)
四川省成都经济区1∶25万多目标区域地球化学调查(批准号:基[2003]012-01)
吉林省1∶25万多目标区域地球化学调查(批准号:基[2004]012-08)
内蒙古河套农业经济区生态地球化学调查(批准号:基[2004]012-10)共同资助
