面向土壤系统分类的土壤调查制图方法的初步研究

我国的土壤系统分类方案已经基本形成,但还没有相应的土壤调查方法技术研究。按照传统土壤调查的主要剖面、检查剖面、定界剖面的思想与办法,采用空间内插技术,在研究区的4条实验路线上共挖掘了64个剖面点,通过这些剖面点的诊断层和诊断特性确定了研究区的土壤类型并勾绘了土壤类型界线。再用1条检验路线对勾绘的土壤图进行检查,结果表明,在检验路线上设置的20个检查剖面点中,其中19个剖面点与实际情况相符,正确率95%,说明使用内插法进行面向土壤系统分类的土壤调查制图是可行的。再结合土壤景观可以辅助土壤调查工作者更高效地确定土壤类型、勾绘土壤界线。

Preliminary study on soil survey and mapping for soil taxonomy

Chinese Soil Taxonomy has been basically formed, but there is no corresponding technical study on soil survey methods. Based on major soil profiles, checking soil profiles and delimitation soil profiles, by using the spatial interpolation methods 64 points of soil profiles were dug in four experimental lines, the diagnostic horizons and diagnostic characteristics of those profiles were used to determine the soil types in the studying area and to draw the boundary lines of soil map. A checking line was used to check the precision of the soil map and the result showed that the accuracy rate was as high as 95%, which proved it possible to use the spatial interpolation methods on the soil survey and mapping based on soil taxonomy. Combined with the soil landscapes, it can help soil investigators to determine the soil types and draw the boundary lines of soil map more efficiently.