无瓣海桑与芦苇两种湿地系统对N、P净化作用比较

Comparison on purification effects of Sonneratia apetala and Phragmites communis wetland systems on nitrogen and phosphorus

比较研究了芦苇和无瓣海桑湿地系统的净化效应,分季节采样测定;了两系统中的水、土壤、植物样品进行N、P含量及相关指标。结果表明:两系统水体中秋冬季的污染比较严重,而无瓣海桑对水体中N、P的净化效果优于芦苇系统,尤其是在冬季;夏季土壤对N、P的吸附力比冬季时强,夏季无瓣海桑土壤中N含量低于芦苇,冬季则相反,无瓣海桑系统土壤对P的吸附作用也强于芦苇系统;不论在冬季还是夏季,无瓣海桑湿地系统的净化效果都要好于芦苇系统,芦苇对N的富集作用比对P的强,而无瓣海桑对P元素的富集作用相对较强。

To compare the purifying effect of wetland systems ofSonneratia apetala and Phragmites communis, nitrogen （N） and phosphorus （P） contents, and relevant indicators in water, soil and plant samples were determined in each season. The results show that water pollution in the two systems was serious in autumn and winter. The purifying effects of S. apetala on N and P were better than of P. communis in water, especially in winter. Soil adsorption on N and P was stronger in summer than in winter. In summer, N content in S. apetala soil was lower than that in P communis soil, while it was opposite in winter. P adsorption in S. apetala soil was also stronger than in P communis soil. No matter in winter or in summer, purification effect orS. apetala wetland system was better than that of P communis system. Enrichment effect of P. communis on N was stronger than on P, while S. apetala had a relatively obvious enrichment effect on P.