薄层农田黑土速效氮磷钾含量的空间异质性

Spatial Heterogeneity of Available Nitrogen, Phosphorus and Potassium Content in Thin Layer Black Soil

利用地统计学对黑龙江省双城市薄层农田黑土的全碳和速效氮、磷、钾的空间异质性进行了分析,结果表明四者均具有空间异质性。土壤全碳含量的空间异质性最高,主要受黑土层厚度的影响,土壤速效氮磷钾的空间异质性较差,主要受随机因子的影响,占80%以上。全碳和速效氮、磷、钾的空间有效最大相关距离分别为15.7km,4.6km,11.2km,7.1km。土壤全碳与碱解氮存在极显著正相关。

Spatial heterogeneity of total carbon content, available nitrogen, phosphorus and potassium content in thin layer black soil of Shuangcheng city, Heilongjiang province was analyzed by geostatistics method. The results showed all of them had heterogeneity. Soil total carbon content was significantly impacted by spatial distance, the depth of black soil layer affected its spatial distribution. There was a relative low spatial heterogeneity of available nitrogen, phosphorus and potassium content, more than 80 percent of them was affected by stochastic factors. The range of total carbon content, available nitrogen, phosphorus and potassium content was 15.7 km,4.6 km,11.2 km,7.1 km, respectively. There were significant correlation between total C and available N.