南方丘陵耕地土壤有机质空间插值精度比较——以衢江区为例

以浙江省衢江区的耕地地力调查有机质数据为基础,比较分析普通克里格（OK）和反距离加权插值法（IDW）的有机质插值精度。研究结果表明,在同样的数据处理条件下,反距离加权插值优于普通克里格；在同一插值方法下,对按地形地貌分类、按耕地利用方式分类与整体不分类型3种情况比较,按耕地利用进行分类处理略优于按地形地貌分类处理,而按耕地利用分类和按地形地貌分类后插值精度均明显优于整体不分类型处理。

Comparison of spatial interpolation for soil organic matter of hilly area in Southern China

Qujiang, a typical hilly area in Southern China, was selected to analyze the spatial interpolation for soil organic matter. In the experiment, two spatial interpolation methods, ordinary Kriging (OK) and inverse distance weighted (IDW), were applied. The results showed that IDW was better than OK in the same data processing condition. Under one interpolation method, the comparison among 3 conditions including classifications according to terrain and physiognomy, farmland use type and non\|classification showed that the classification of farmland use type was superior to the classification of terrain and physiognomy, and both of them were much better than the non\|classification．