生态环境学报2017，Vol.26Issue(9)：1577-1583,7.DOI:10.16258/j.cnki.1674-5906.2017.09.017
亚热带丘陵区湿地水生植物组合模式拦截氮磷的研究
Study on the Aquatic Plant Combination Patterns for Intercepting Nitrogen and Phosphorus in Wetland of Subtropical Hilly Region
摘要
Abstract
Constructed wetlands (CWs) are effective action of agricultural non-point source pollution control. Plant composition and combination pattern are the key of effect of CWs on the pollution control ability. As a case study, we selected subtropical hilly red soil region of Hunan. Based on the CWs experiments, we studied dominant plant Myriophyllum elatinoides, which had high removal rate of nitrogen (N) and phosphorus (P), combined with Sparganium stoloniferum, Pontederia cordata, Hydrocotyle vulgaris, Juncus effuses, Calla palustris, Alternanthera philoxeroides, respectively. Our study were to investigate removal efficiency of these combination patterns for treating rural sewage (COD: 56.34~109.41 mg·L-1, TN: 21.11~33.24 mg·L-1, TP: 3.36~5.74 mg·L-1). From July to November, our results showed that the removal rates of COD was the best and high up to 72.9% by M. elatinoides and C. palustris composite pattern, and effluent's average concentration of COD was 21.24 mg·L-1. The removal rates of TN was the best and high up to 84.9% by M. elatinoides and H. chinensis composite pattern, and effluent's average concentration of TN was 3.52 mg·L-1. The removal rates of TP was the best and high up to 95.2% by M. elatinoides and P. cordata composite pattern, and effluent's average concentration of TP was 0.22 mg·L-1. N and P accumulation quantity ranged from 12.43 g·m-2 to 30.87 g·m-2, from 0.99 g·m-2 to 4.69 g·m-2, respectively, in different composite patterns. N and P accumulation quantity were the most by M. elatinoides and P. cordata combination pattern (Augest: N 30.87 g·m-2, November: P 4.69g·m-2). The N and P absorption removal rate of plant uptake were 17.3%~27.8% and 10.3%~16.7%, respectively. N and P uptake percentage were most by M. elatinoides and P. cordata composite pattern, N and P uptake percentage were least by M. elatinoides and C. palustris composite pattern. In general terms, M. elatinoides and P. cordata composite pattern was the best optimal in the studied area.关键词
亚热带丘陵区/水生植物/组合模式/人工湿地/氮/磷Key words
subtropical hilly red soil region/aquatic plants/combination pattern/constructed wetlands/nitrogen/phosphorus分类
资源环境引用本文复制引用
王丽莎,李希,甘蕾,张瑞,吕殿青,周脚根,张满意,李裕元,吴金水..亚热带丘陵区湿地水生植物组合模式拦截氮磷的研究[J].生态环境学报,2017,26(9):1577-1583,7.基金项目
国家自然科学基金项目(41601268) （41601268）
国家科技支撑计划项目(2014BAD14B02) （2014BAD14B02）
湖南省地理学重点学科建设项目(20110101) （20110101）
河南省重大科技专项(161100310600) （161100310600）
水利部公益性行业科研专项经费项目(201501055) （201501055）
