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利用地统计学方法和地理信息系统技术分析辽宁省昌图县朝阳镇耕层土壤养分的数据统计特征、空间变异性和分维数及空间分布规律。研究结果表明,有机质的含量普遍较低,碱解氮的含量普遍较高;有机质及速效养分含量的变异系数顺序为碱解氮(速效钾(有机质(速效磷;地统计学半方差分析结果显示,有机质、速效磷的块金值与基台值的比值介于25%~75%之间,具有中等程度空间相关性。碱解氮的块金值与基台值的比值大于75%,空间相关性较弱。速效钾的块金值与基台值的比值小于25%,具有强烈的空间相关性。碱解氮的分维值D最大为1.996,速效钾的分维值D最小为1.802,表明碱解氮的空间分布比速效钾的空间分布复杂。
Using the methods of geostatistics and geographic information system (GIS), the statistical characteristics of soil nutrients, spatial variability, fractal dimension and spatial distribution of soil nutrients in Chaoyang Town, Changtu County, Liaoning Province were analyzed. The results showed that the content of organic matter was generally low, and the content of available nitrogen was generally high. The coefficient of variation of organic matter and available nutrient content was in the sequence of available nitrogen (available potassium (organic phosphorus (available phosphorus) , And the ratios of nuggets and available phosphorus to nugget values ranged from 25% to 75%, with a moderate degree of spatial correlation.The ratio of the nugget value to the base station value for available nitrogen was more than 75% And the correlation was weak.The fractal dimension value of available nitrogen was 1.996 and the minimum value of available potassium was 1.802 , Indicating that the spatial distribution of available nitrogen is more complex than the available potassium.