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-  2010 

中国表层土壤全氮的空间模拟分析

DOI: 10.11821/yj2010110007

Keywords: HASM方法,土壤全氮,国家尺度,空间模拟

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Abstract:

摘要: 基于第二次全国土壤普查5336个典型土壤剖面数据,分析表土全氮(A层)与环境因素的相关关系,利用多元回归模型和HASM模型结合的方法模拟中国国家尺度上表层土壤全氮的空间分布格局。结果表明:对350个检验点模拟结果的平均绝对误差和平均相对误差为0.67g·kg-1和61.06%,与普通克里格法相比分别降低了0.05g·kg-1和17.53%;对样点分布较少的西北地区的模拟结果也更符合实际情况。多元回归模型和HASM模型结合的方法考虑了环境因素的影响,可作为目前模拟大尺度土壤性质空间分布相对有效的方法。

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