内蒙古自治区土壤有机碳库储量及分布特征.pdf

现代地质
Vol. 26 No 5
2012年10月
GEOSCIENCE
0ct.2012
内蒙古自治区土壤有机碳库储量及分布特征
傳野思,夏学齐,杨忠芳,李娟
(中国地质大学地球科学与资源学院,北京100083)
摘要:根据内蒙古自治区土壤资料中共461个土壤剖面数据估算表层及全剖面的土壤有机碳密度(SOCD)和储量
(SOCR),绘制其SOCD的空间分布图,并对其影响因素进行了探讨。结果表明:内蒙古地区的表层SOCD为0.63
15.93kgm2,平均为3.68kg?m-2;全剖面SOCD为0.22~68.77kg·m2,平均为10.35kg?m2,不同土壤类型之间有
定差异。内蒙古表层SOCR为4.10Pg,丽全剖面储量为10.79Pg。士壤有机碳含量及分布受气候、土壤性质和人为
活动的影响明显。最后,根据年均温与土壤有机碳密度的相关关系,估算得出当气温升高1℃,内蒙古地区土壤有机
碳的释放量为0.91Pg
关键词:内蒙古;土壤有机碳密度(SOCD);土壤有机碳储量(SOCR);全球变暖
中图分类号:X142;P595
文献标志码:A
文章编号:1000-8527(2012)05-0886-10
Storage and Distribution of Soil Organic Carbon in Inner Mongolia
FU Ye-si, XIA Xue-qi, YANG Zhong-fang, LI Juan
School of Earthscienees and Res ces, hi verity fgsierc, Reijing 100083, China)
Abstract: Based on 461 soil profiles from various data sources of Inner Mongolia, the soil organic carbon densi-
ty(S0CD )and reserves(SOCR )of 0-20 cm and the whole profile in Inner Mongolia are estimated. The spa
tial distribution of OCD was mapped within ARCGIS and the factors affecting OCR and its distribution were dis-
cussed. It was found that the soil organic carbon density in 0-20 cm of Inner Mongolia is between 0. 63 and
15.93 kg m", and the average is 3.68 kgm-2. Whereas the carbon density of the whole profile is between
0. 22-68.77 kgm"and the average is 10.35 kg m". There are differences among the soil types for this val-
ue. And the SOCR in 0-20 cm of Inner Mongolia are 4 10 Pg. Meanwhile, SOCR of the whole profile are
10.79 Pg.$0C)) is controlled by various geographical factors such as emperature, precipitation, vegetation and
land use type etc. Estimation result showed that when mean annual temperatures rise by 1C, the release of soil
organic carbon in Inner Mongolia region is about 0.91 Pg
Key words: Inner Mongolia; soil organic carbon density (S0CD); soil organic carbon reserves(SOCR);
ioba warmin
0引言
政府间气候变化专门委员会( Intergovernmental Pan
e] on Climate Change,IPCC)有报告指出1860年以
近年来,随着经济发展,人们们对化石燃料的来全球平均气温升高了(0.74±0.18)℃,而1990
使用和对大自然的改造使得大气中CO2浓度急剧年到2100年,全球平均气温将升高1.1~6.4℃
升高。工业革命以前大气中CO2浓度一直处于较并且这一情况还将持续下去,因此了解全球变
平衡的0.28%,而今已经升高到0.38%0。联合国暖与全球碳循环之间的作用変得尤为重要。而土
收稿日期:2012-07-30;改回日期:2012-08-28;责任编辑:楼亚儿。
基金项目:中国地质调査局地质调查项月“中国典型地区土壤碳汇源转化机理研究”(1212011087125);国土资源部公益性行业
科研专项“中国主要农耕区土壤碳库与固碳潜力研究"(200911020)。
作者筒介:傅野思,女,硕士研究生,1989年出生,地球化学专业,主要从事环境地球化学的研究。
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