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0.63～15.93 kg.m-2,平均为3.68 kg.m-2;全剖面SOCD为0.22～68.77 kg.m-2,平均为10.35 kg.m-2,不同土壤类型之间有一定差异。内蒙古表层SOCR为4.10 Pg,而全剖面储量为10.79 Pg。土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0.91 Pg。
Based on 461 soil profiles from various data sources of Inner Mongolia,the soil organic carbon density（SOCD） and reserves（SOCR） of 0-20 cm and the whole profile in Inner Mongolia are estimated.The spatial distribution of SOCD was mapped within ArcGIS and the factors affecting SOCR and its distribution were discussed.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-2,and the average is 3.68 kg · m-2.Whereas the carbon density of the whole profile is between 0.22-68.77 kg · m-2 and the average is 10.35 kg · m-2.There are differences among the soil types for this value.And the SOCR in 0-20 cm of Inner Mongolia are 4.10 Pg.Meanwhile,SOCR of the whole profile are 10.79 Pg.SOCD is controlled by various geographical factors such as temperature,precipitation,vegetation and land use type etc.Estimation result showed that when mean annual temperatures rise by 1℃,the release of soil organic carbon in Inner Mongolia region is about 0.91 Pg.
出处
《现代地质》
CAS
CSCD
北大核心
2012年第5期886-895,共10页
Geoscience
基金
中国地质调查局地质调查项目"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)
