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采用地统计学方法与GIS相结合的方法,研究了海南省儋州市橡胶园土壤表层(0~20cm)钾素的空间变异特征。结果表明,土壤全钾含量的空间变异函数为K-Bessel模型,而速效钾含量的空间变异函数为Pentaspherical模型。土壤全钾和速效钾均具有中等的空间相关性,说明其受结构因素和施肥、管理水平等随机因素共同影响。Kriging插值图较为直观地描述了儋州市橡胶园土壤钾素的空间分布规律。
Using the method of geostatistics combined with GIS, the spatial variability of soil potassium (0 ~ 20cm) in rubber plantation in Danzhou city of Hainan Province was studied. The results showed that the spatial variability function of total potassium in soil was K-Bessel model, while the spatial variability of available potassium content was Pentaspherical model. Soil total potassium and available potassium both have a moderate spatial correlation, indicating that they are affected by structural factors and fertilization, management and other random factors together. The Kriging interpolation diagram more directly describes the spatial distribution of soil potassium in Danzhou rubber plantation.