欢迎访问《中国农学通报》，
中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (6): 256-260.

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

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   

  • 收稿日期:2010-12-28 修回日期:2011-01-14 出版日期:2011-03-20 发布日期:2011-03-20
  • 基金资助:

    山东省自然科学基金

Spatial Variability and Comparison of Different Models of Interpolation of Tillage-Layer Soil Organic Matter Based on Geostatistics

  • Received:2010-12-28 Revised:2011-01-14 Online:2011-03-20 Published:2011-03-20

PDF (PC)

1102

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；C0/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: 腐熟度, 腐熟度

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 C0/sill was 0.86. This showed that the spatial correlation of tillage-layer soil organic matter is very weak and was affected by human activities, such as tillage, the application of fertilizers and cropping system. These factors made the spatial correlation of tillage-layer soil organic matter weaken, and gradually became homogenization. The organic matter content of tillage-layer soil was low, so the management of tillage should be changed in order to achieve the sustainable use of arable land resources.

中图分类号: