内蒙古农牧交错带土地利用变化对土壤碳储量的影响研究（英文）

编号 zgly0001584097

文献类型 期刊论文

文献题名 内蒙古农牧交错带土地利用变化对土壤碳储量的影响研究（英文）

作者 赵玮  胡中民  李胜功  郭群  杨浩  张铜会 

作者单位 KeyLaboratoryofEcosystemNetworkObservationandModeling  InstituteofGeographicSciencesandNaturalResourcesResearch  CAS  UniversityofChineseAcademyofSciences  NaimanDesertificationResearchStation  NorthwestInstituteofEco-Environment 

母体文献 Journal of Geographical Sciences 

年卷期 2017年08期

年份 2017 

分类号 S153 

关键词 soilorganiccarbon  soilcarbonprofile  landusechange  grazing  tillage  forestage 

文摘内容 Soil organic carbon(SOC) stocks in terrestrial ecosystems vary considerably with land use types. Grassland, forest, and cropland coexist in the agro-pastoral ecotone of Inner Mongolia, China. Using SOC data compiled from literature and field investigations, this study compared SOC stocks and their vertical distributions among three types of ecosystems. The results indicate that grassland had the largest SOC stock, which was 1.5-and 1.8-folds more than stocks in forest and cropland, respectively. Relative to the stock in 0–100 cm depth, grassland held more than 40% of its SOC stock in the upper 20 cm soil layer; forest and cropland both held over 30% of their respective SOC stocks in the upper 20 cm soil layer. SOC stocks in grazed grasslands were remarkably promoted after ≥20 years of grazing exclusion. Conservational cultivation substantially increased the SOC stocks in cropland, especially in the 0–40 cm depth. Stand ages, tree species, and forest types did not have obvious impacts on forest SOC stocks in the study area likely due to the younger stand ages. Our study implies that soil carbon loss should be taken into account during the implementation of ecological projects, such as reclamation and afforestation, in the arid and semi-arid regions of China.