CAJ | 학술논문

运用GIS与地统计学相结合的方法，在村级尺度下研究了渝东北丘陵区农田土壤碱解氮、速效磷的空间变异性。结果表明：在村级尺度下土壤碱解氮、速效磷含量都具有中等程度变异，变异系数分别为40．27％和64．21％。土壤碱解氮半方差函数最佳理论模型为高斯模型，且具有强烈的空间相关性，C0（C0＋C）值为14．5％，空间相关距离为61m；速效磷以指数模型模拟最好，具有中等程度的空间相关性，Cd（C0＋C）值为45．0％，空间相关距离为47m。土壤碱解氮在东西方向上表现出各向异性，与地形表现出很好的一致性；土壤速效磷在东西、南北方向上都有明显的趋势特征，表现出各向异性。
운용GIS여지통계학상결합적방법，재촌급척도하연구료투동북구릉구농전토양감해담、속효린적공간변이성。결과표명：재촌급척도하토양감해담、속효린함량도구유중등정도변이，변이계수분별위40．27％화64．21％。토양감해담반방차함수최가이론모형위고사모형，차구유강렬적공간상관성，C0（C0＋C）치위14．5％，공간상관거리위61m；속효린이지수모형모의최호，구유중등정도적공간상관성，Cd（C0＋C）치위45．0％，공간상관거리위47m。토양감해담재동서방향상표현출각향이성，여지형표현출흔호적일치성；토양속효린재동서、남북방향상도유명현적추세특정，표현출각향이성。
Statistical methods and GIS technology were used for the analysis of the spatial variability,to reveal the spatial variability of soil alkali-hydrolysable nitrogen ,rapidly available phosphorus under the village scale. The results indicated:In the village scale, soil alkali-hydrolysable nitrogen ,rapidly available phosphorus content has moderate variability.The coefficients of variation were 40.27% and 64.21%. Soil alkali-hydrolysis nitrogen semi-variance function optimal theory model for Gauss models, and had a strong spatial correlation, CO/(C0+C )value was 14.5%, the spatial correlation distance was 61 m. Rapidly available phosphorus in exponential model to simulate the best, with a moderate degree of spatial correlation, Co/ (C0+C)value was 45.0%, the spatial correlation distance was 47 m. The soil alkali-hydrolysable nitrogen in east-west direction on exhibit anisotropic, and terrain showed good consistency. Soil rapidly available phosphorus in the East, North and South direction had obvious characteristics, exhibiting anisotropy.