南方丘陵山区湿地氮磷时空变化及影响因素分析

对陈墩库区湿地从2015年9月到2016年8月进行水质监测,通过方差分析和相关性分析归纳总结湿地氮磷浓度变化规律,探究不同植物与湿地氮磷的相互作用。结果表明:陈墩库区TN、TP浓度在不同湿地季节变化有所差异,各湿地TN浓度在春、夏、冬差异显著;TP在冬季有显著差异,其余季节均无明显差异,陈墩库区TN、TP浓度季节变化与进水氮磷浓度和湿地面积、植物类型及生长状况密切相关;不同植物与湿地TN、TP呈现不同的相关性,这与水生植物对氮磷的吸收能力不同有关;轮叶黑藻、再力花、芦苇对氮磷的去除效果较好。

Spatial and temporal variation of nitrogen and phosphorus in wetland of hilly areas in southern China and analysis of influencing factors

The water quality of Chendun reservoir area from September 2015 to August 2016 was monitored. The variation of nitrogen and phosphorus concentration in wetland was summarized by analysis of variance. The interaction between nitrogen and phosphorus in different plants was discussed by correlation analysis. The results showed that the seasonal variation of TN and TP concentrations in the Chendun reservoir area was different. The TN concentrations in the functional areas were different in spring, summer and winter. There were significant differences of TP in the sampling points in the winter and no significant differences in other seasons. The variations of TN and TP concentrations were closely related to the influent nitrogen and phosphorus concentrations, wetland area, water depth, plant type and growth status. Different plants showed different correlation with wetlands TN, TP, which is related to the absorption capacity of aquatic plants on nitrogen and phosphorus. Among them, the leaves of Hydrilla verticillata, Thalia dealbata Fraser and Phragmites australias Trin,Reed have better removal effect on nitrogen and phosphorus.