不同方法预测河北省土壤有机碳密度空间分布特征的研究
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* 中国科学院知识创新工程重大项目(KZCX1-SW-01-19);中国科学院知识创新工程信息化建设专项(INF105S);中国科学院知识创新工程领域前沿项目(ISSASIP0201)资助


DIFFERENT METHODS FOR PREDICTION OF SPATIAL PATTERNS OF SOIL ORGANIC CARBON DENSITY IN HEBEI PROVINCE, CHINA
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    摘要:

    运用多元线性回归、泛克里格和回归克里格三种方法,结合由DEM获取的地形属性因子预测了河北省土壤有机碳密度的空间分布。多元线性回归预测的残差较大,模型对总方差的解释仅18.6%,采用泛克里格方法后,预测残差降低,预测结果的极差范围变宽,低碳密度区的局部变异得以体现,模型对总方差的解释程度提高到53%。而回归克里格方法应用后预测残差和均方根预测误差进一步降低,模型对总方差的解释程度提高到65%,回归克里格方法也能更好地反映碳密度与地形的关系以及局部变异。三种方法中回归克里格预测效果最好,泛克里格次之,而多元线性回归方法最差。

    Abstract:

    The spat ial patterns of soil organic carbon (SOC) are closely related to changes in the global climate In order to quantify spatial patterns of SOC density in Hebei Province, China, three different methods, i e mult iple linear regression (MLR), universal kriging (UK) and regression-kriging (RK), coupled with auxiliary topographic factors extracted from a 1:250 000 DEM (cell size is 100 m) were applied to predict spatial patterns of SOC density for Hebei Province The results show that the sum squared error (SSE) of the MLR method was quite large with only 18 6% of the total variation explainable, the UK method lowered SSE but widened the range of SOC density as compared with the MLR method However, it can explain 53% of the total variation and detect local variation of lower SOC density in southeast of Hebei Province When the RK method was applied, the SSE decreased significantly It not only explained 65% of the total variation, but also better reflected the relationship between SOC density and landform and local variation, indicating that it is the best one for predicting spatial patterns of SOC density.

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赵永存,史学正,于东升,赵彦锋,孙维侠,王洪杰.不同方法预测河北省土壤有机碳密度空间分布特征的研究[J].土壤学报,2005,42(3):379-385. DOI:10.11766/trxb200406150305 Zhao Yongcun, Shi Xuezheng, Yu Dongsheng, Zhao Yanfeng, Sun Weixia, Wang Hongjie. DIFFERENT METHODS FOR PREDICTION OF SPATIAL PATTERNS OF SOIL ORGANIC CARBON DENSITY IN HEBEI PROVINCE, CHINA[J]. Acta Pedologica Sinica,2005,42(3):379-385.

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  • 收稿日期:2004-06-15
  • 最后修改日期:2004-12-06
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  • 在线发布日期: 2013-02-25
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