基于地统计学的耕层土壤有机质空间变异及不同插值模型的比较_张文龙.pdf

中国农学通报 2011,27(6):256-260 Chinese Agricultural Science Bulletin 基于地统计学的耕层土壤有机质空间变异 及不同插值模型的比较 张文龙，李玉环，姬 祥 （山东农业大学资源与环境学院，山东泰安271018） 摘 要：为了揭示耕层土壤有机质含量的空间变异规律，指导土壤肥力评价和管理工作，实现耕地资源的 可持续利用，本研究通过土壤样本野外采样和分析，测定样本中土壤有机质的含量，在ArcGIS 地理信息 系统平台上，利用地统计分析模块中的克立格法分析文登市耕层土壤有机质的空间变异性，并对比选择 最优的克立格插值模型。结果表明：文登市耕层土壤有机质拟合的最优理论模型是Tetraspherical 模型； C/sill 值为0.86，耕层土壤有机质空间相关性很弱，耕作制度、施肥数量和种类、种植制度等人类活动的 0 作用影响很大，这些人为活动使土壤有机质的空间相关性减弱，逐渐向均一化方向发展；耕层有机质含 量处在较低水平，应改善耕作管理方式实现耕地资源的可持续利用。 关键词：耕层；土壤有机质；地统计学；克立格模型；空间变异 中图分类号：S158 文献标志码：A 论文编号：2010-3810 SpatialVariabilityandComparisonofDifferentModelsofInterpolationof Tillage-LayerSoilOrganicMatterBasedonGeostatistics Zhang Wenlong, Li Yuhuan, Ji Xiang (CollegeofResourcesandEnvironment,ShandongAgriculturalUniversity, Tai ’an Shandong 271018) Abstract:The objective of this study was to explore the spatial variability of tillage-layer soil organic matter content, and to guide the evaluation and management of soil fertility, so as to achieve the sustainable use of land resources. Through sample gathering and analysis of soil samples, the organic matter content of tillage-layer soil samples were determined, and the spatial variability of soil organic matter was studied based on Kriging method handled by ArcGIS, and selected the optimal Kriging interpolation model. The results showed that the optimal Kriging interpolation model of tillage-layer soil organic matter in Wendeng city was Tetraspherical model, and the value of C /sill was 0.86. This showed that the spatial correlation of tillage-layer 0 soil org