再生水补水的人工湿地土壤理化特征研究

Physical and Chemical Characteristics of Soil in the Constructed Wetland Irrigated by Reclaimed Water

以重庆市彩云湖国家湿地公园内的人工湿地为研究对象,采用再生水补水人工湿地,并以自来水常规灌溉为对照,分析土壤理化特征。结果表明,与自来水常规灌溉相比,再生水补水人工湿地的土壤EC、含锌量较高,土壤盐分一定程度的累积;人工湿地土壤有机质、有效磷较高,但非再生水本身导致,与湿地环境密切相关;人工湿地土壤pH值、有效氮、速效钾、全量养分、铜、铁、铬、铅、砷、汞与自来水常规灌溉无明显差异。

With the constructed wetland in Chongqing Caiyun lake as material, the wetland was irrigated by reclaimed water and area near the wetland irrigated by tap water was taken as the control in order to research the soil physical and chemical characteristics. The results showed that： compared with tap water irrigation, the soil contents of EC, Zn were higher in the constructed wetland; Soil organic matter and available phosphate in the constructed wetland were also higher, which was closely related to the environmental conditions of the constructed wetland. There were no significant differences for soil pH, contents of available nitrogen, available potassium, total nutrient, Cu , Fe, Cr , Pb, Sn and Hg bewteen constructed wetland irrigated by reclaimed water and area irrigated by tap water.