苏州市土壤养分及有机质含量变化的空间尺度效应

Scaling Effect on Spatial Variability of Soil Nutrients and Organic Matter Content

[目的]明确苏州市土壤养分及有机质含量在不同空间尺度下的变化规律。[方法]以2010年苏州市耕地质量监测点数据为基础,分析了土壤养分及有机质含量与空间尺度的关系。[结果]土壤养分及有机质含量的变异程度与空间尺度变化存在一定关系,其中土壤养分及有机质含量的组内变异程度随着空间尺度的增大而增加,而其组间变异程度则表现出相反趋势,土壤养分及有机质含量的组间变异程度普遍大于其组内变异程度。[结论]为准确确定土壤养分及有机质含量的空间区域划分方法提供了科学依据。

[Objective]The study aimed to define the variation of soil nutrients and organic matter content in different spatial scales in Suzhou City. [Method] Based on the data from Suzhou cultivated land quality monitoring data in 2010,the relationship between the variation of soil properties（ include soil nutrients and organic matter） and the spatial scales were analyzed. [Result]The results indicated that the variation coefficient of soil properties content increased with increasing the number of soil sample while individual soil sample was taken as a basic statistical unit,and decreased with spatial scale up while average of soil properties content in the defined scale was taken as a statistical unit. The variation coefficient of soil properties content within soil group less than among soil groups. [Conclusion] The result could prove data support for determination of soil nutrients and organic matter content in the space division method.