CAJ | 학술논문

采用10 m×10 m高密度网格采样的地统计学方法,进行了小尺度(10.24 hm~2)土壤耕层(0～30 cm)有机质的空间分布特征量化研究.研究发现,取样区内土壤有机质空间分布表现出弱变异性,CV≤3.43%,但整体含量偏低,SOM≤1.04%;东西、南北、东南和西南四个方向上半方差函数的差异性表明,有机质空间分布具有异向性,基于各向同性假设和各向异性的半方差函数结构分析以及Kriging估计都能很好地反映取样区土壤有机质的空间变异性,但后者在估计结果精度和真实性方面要优于前者.
채용10 m×10 m고밀도망격채양적지통계학방법,진행료소척도(10.24 hm~2)토양경층(0～30 cm)유궤질적공간분포특정양화연구.연구발현,취양구내토양유궤질공간분포표현출약변이성,CV≤3.43%,단정체함량편저,SOM≤1.04%;동서、남북、동남화서남사개방향상반방차함수적차이성표명,유궤질공간분포구유이향성,기우각향동성가설화각향이성적반방차함수결구분석이급Kriging고계도능흔호지반영취양구토양유궤질적공간변이성,단후자재고계결과정도화진실성방면요우우전자.
The data collected from a 10.24 hm~2 crop land in dense grid of 10 m×10 m were used to analyze the spatial variability of the surface (0～30 cm )soil organic matter(SOM)by geostatistics method.Within the study area, soil organic matter had weak variability as CV≤3.43%, but it was entirely low in the content no more than 1.04%. The differences between semivariograms among the four directions showed that soil organic matter had anistropical distribution characteristics. Both Kriging estimation based on the isotropical semivariogram model and the combination model of anisotropical semivariogram made satisfiable predication, however, the latter had better accuracy and reality than the anterior.