下辽河平原旱田氮对地下水污染贡献研究

Study on Impacts of Nitrogen on Groundwater Quality in the Dry Farmlands of Downstream of Liaohe River

以下辽河平原旱田土壤为研究对象,通过对土壤中铵态氮的吸附动力学过程进行定量分析,预测铵态氮流失及其对地下水环境的潜在影响。结果表明:粒径<0.001mm粘粒含量、pH值、有机质含量与铵态氮的平衡吸附量呈正相关,大民屯地区铵态氮对地下水造成污染的潜力最大。

Taking soils in dry farmland of downstream Liaohe River as study objects, this paper analyzed the adsorption dynamics of ammonium nitrogen in soils quantitatively, and forecasted the potential impact of ammonium nitrogen running off on groundwater. The results show that： the content of cosmid（grain size〈 0.001 mm）, pH values and contents of organic matter are in positive correlation with equilibrium adsorption amount of ammonium nitrogen, and the maximum impact of ammonium nitrogen on groundwater is in the Damintun region.