土壤速效钾空间模拟的技术方法研究

采用GIS和地统计学中的普通克里格插值(Ordinary Kriging)和序贯高斯模拟方法(SGSV单次实现和SGSA平均实现)对河南省封丘县土壤速效钾的空间变异特征进行了分析研究。结果表明,Kringing插值具有明显的平滑效应;SGSV模拟与实测数据具有相似的空间自相关结构,既尊重了实测数据,又可以再现区域化变量的空间波动性;SGSA在一定程度上能够消除平滑效应的影响,同时还能兼顾实测数据的结构性特征。因此,SGSA模拟在土壤速效钾空间结构的研究中,能够达到更好的效果。

The Spatial Simulation Technical Method about Soil Available Potassium

An example of fengqiu in Henan Province was given,whit the GIS technical support,using rrdinary Kriging interpolation(OK) and sequential gaussian simulation to analyse the spatial variability of soil available potassium.The results showed that the estimated value by Kriging interpolation had showed obviously smoothing effect.SGSV had the similar data spatial configuration as the measured values,at the same time,it both respected the measured data,and could reproduce the spatial undulatory property of the regionalized variable.To some extent AGSA could eliminate the influence of smoothing effect,meanwhile could consider the constitutive property of the measured data.So the use of SGSA Simulation could reach better results on the study of spatial configuration of soil available potassium.