土壤有机碳储量估算结果精度分析——以广东省为例  

Accuracy Analysis of Soil Organic Carbon——ACase Study of Guangdong Province,China

作　　者：黄玉麟[1] 郭治兴[2] 吴志峰[1,2] 柴敏[2] 

机构地区：[1]广州大学地理科学学院,广州510006 [2]广东省生态环境与土壤研究所,广州510650

出　　处：《中国农学通报》2014年第17期300-307,共8页Chinese Agricultural Science Bulletin

基　　金：广东省科技计划项目"广东省土壤肥力信息库建设及数据挖掘初步应用"(2012B060500007);"珠江三角洲土壤质量与农产品安全关键技术应用"(92011B090300052);"珠江三角洲土地资源与土壤质量图谱研究及其应用"(2011B030500031);国家自然科学基金"利用城乡环境梯度研究土壤C循环过程对环境变化的耦合响应"(31100353)

摘　　要：土壤有机碳库是陆地碳库的重要组成部分,其变化对气候变化及全球碳循环有着重要的作用,而对土壤有机碳储量(SOCS)的精确估算是研究的基础。以广东省为例,以常规土壤剖面及土壤类型图数据估算表层SOCS,以相同方法,利用基于大量土壤采样数据制作的有机质含量图数据估算表层SOCS的范围,分析常规数据估算结果的精度。结果显示,采用土壤剖面数据计算出的SOCS要比采用有机质含量图算出的SOCS均值高出24.81%,达1.360×108t,广东省典型的赤红壤和水稻土分别高0.739×108t、0.469×108t。可以推断,利用有限样本量的土壤剖面数据估算结果可能会高估SOCS的真实储量。不同数据源有各自的局限和优势,利用土壤有机质含量图来估算SOCS,不仅为SOCS估算方法进行了有力的补充,同时为SOCS真实值提供了必要的参考。Soil organic carbon is the important part of terrestrial carbon pool, it plays an important role in climatic change and global carbon cycle, and the accurate estimation of soil organic carbon storage （SOCS） is one precondition of its research. Taking Guangdong Province as an example, the top SOCS was estimated by applying the second national soil survey data （341 profiles） and soil type map, as the same way, the soil organic matter degree map based on huge number of soil profiles data was used to calculate the range of SOCS, the accuracy of regular data were also analyzed. The result indicated that： the SOCS using regular soil profiles data was more than the SOCS mean value of new data about 24.81%, up to 1.360x l0s t, about 0.739x l0s t and 0.469x l0s t in laterite red soil and paddy soil respectively. It could be inferred that the result by soil profiles data was overestimated the real SOCS. Different data sources had their own limitations and advantages. Therefore, the range of SOCS using the soil organic matter degree map would doubtless serve as a powerful supplement in the SOCS estimate methods, as well as province necessary reference for the SOCS true value.

关 键 词：土壤有机碳 储量 估算方法 精度 

分 类 号：S153.6[农业科学—土壤学] S155[农业科学—农业基础科学]