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以全国土地污染防治项目取得地球化学资料为依据,分析研究乐陵-河口地区土壤化学元素特征,结果表明:土壤中一级营养元素有机质、氮、磷相对缺乏,钾含量富足;二级营养元素氧化钙、氧化镁相对缺乏,硫含量富足;其他有益微量元素氧化铁、锰、钼和硼均相对缺乏,氯含量丰富,基本不缺。土壤地力提升的主要障碍因素是土壤盐渍化和土壤重金属污染。根据土壤综合肥力评价结果,结合基础调查成果,提出了通过科学施肥、土壤障碍消除和重金属污染修复等地力提升措施,增强土壤肥力,变中、低产田为中、高产田;兴利除害,抑制土壤重金属元素的活性,降低风险,为高效优质农业的规划与发展提供技术支撑。
Based on the geochemical data obtained from the national land pollution prevention and control project, the characteristics of soil chemical elements in the Leling estuarine region were analyzed. The results showed that the organic matter, nitrogen and phosphorus in the first grade nutrient elements were relatively deficient and the potassium content was sufficient. Calcium oxide, magnesium oxide is relatively scarce, sulfur content is rich; other beneficial trace elements iron oxide, manganese, molybdenum and boron are relatively lacking, chlorine content is rich, basically no shortage. The main obstacles to soil fertility improvement are soil salinization and soil heavy metal pollution. According to the evaluation results of soil comprehensive fertility and the basic survey results, it is proposed that the soil fertility should be enhanced by scientific fertilization, the removal of soil barriers and the remediation of heavy metal pollution, and the medium and high yielding fields should be changed into medium and high yield fields. Inhibit the activities of soil heavy metal elements, reduce the risk and provide technical support for the planning and development of high-efficient and high-quality agriculture.