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OALib Journal期刊
ISSN: 2333-9721
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1980s-2010s内蒙古草地表层土壤有机碳储量及其变化
DOI: 10.11821/dlxb201411006, PP. 1651-1660
Keywords: 有机碳储量,气候变化,区域差异,内蒙古草原,表层土壤
Abstract:
以我国内蒙古草原为研究区域,结合1982-1988年第二次土壤普查资料以及2011-2012年实地考察数据,构建了基于遥感数据和土壤数据的区域表层土壤有机碳储量估算方法,对研究区1980s和2010s表层土壤有机碳储量、空间分布特征及其变化进行研究,结果表明(1)1980s、2010s内蒙古草地表层土壤(0~20cm)有机碳储量分别为2.05PgC、2.17PgC,土壤有机碳密度约为3.48kgC·m-2、3.69kgC·m-2,其空间分布上呈现从草甸草原、典型草原、荒漠草原逐渐降低的特征;(2)1982-2012年间,内蒙古草地表层土壤有机碳储量略有增加,但增加幅度较小,其中草甸草原和典型草原表层土壤有机碳储量增加,荒漠草原则表现为减少。研究结果将为研究区因地制宜地采取固碳措施,实现草地可持续管理提供科学参考。
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