山东省主要耕地土壤的养分含量及空间变异分析

采用GPS定位研究了山东省三大土类主要耕地的养分空间变化情况。结果表明,山东的绝大部分耕地存在有机质含量普遍较低,绝大部分土壤的氮在麦收后呈缺乏状态,山东主要耕地土壤的供磷情况是尽管中高磷含量的耕地占有一定比例,但土壤的有效磷水平整体偏低;山东耕地的钾供应情况是钾素供应充足,无缺钾情况。影响山东三大土类的耕地质量高低的主要养分因子是有效磷和速效钾,其次是有机质和碱解氮,pH值影响最小,但土壤酸化现象不容忽视。因此,在山东省应因地制宜,提高施肥措施,改善肥料施用结构,防止土壤酸化,才能保持山东主要耕地的生产力。

Nutrient Contents of Main Plough-land in Shandong Province and Their Analysis of Spatial Variability

Nutrient spatial status of three soils in Shandong Province were studied with GPS locating system.Results showed that organic matter contents were widely low in most plough-land of Shandong Province and N nutritients of most lands were deficient after wheat harvest.Although there were some media and high-P plough-lands,but the available P levels were absolutely low;K nutrients were supplied adequately in plough-land of Shandong Province and there was no deficiency of potassium.The main nutritient factors wh...