Effects of emerged plant on soil methane emission and nitrogen content in constructed wetland. (January 2019)

• Record Type: Journal Article
• Authors: Sun, Hongying; Xin, Quanwei; Luo, Hailing; Yan, Shaojuan; Lan, Siren; Wang, Yan
• Is Part Of: IOP conference series. Volume 218(2019)
• Publication Date: 2019-01
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/218/1/012135
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: To find the effects of emerged plant on soil methane (CH4) emission and nitrogen content in constructed wetland, we constructed the constructed wetland microcosms with 3 treatments through 2 emerged plants ( Typha orientalis and Phragmites australis ). Results showed that soil CH4 flux have no different (2.0, 2.4, 2.5 mg m −2 d −1, P > 0.05 ), but soil nitrogen contents and microbial biomass nitrogen were significantly different ( P < 0. 01 ) among the 3 treatments. The soil ammonium nitrogen ( P < 0.001 ) and nitrate nitrogen ( P < 0.01 ) contents in the planted constructed wetland were lower than in those unplanted constructed wetland, but microbial biomass nitrogen (MBN) were higher ( P < 0.01 ). The soil CH4 flux, microbial biomass, organic matter and nitrogen content had no different between those constructed wetlands planted with Typha orientalis and Phragmites australis ( P > 0.05 ). As total plant biomass in the constructed wetlands planted with Typha orientalis ( P < 0.001 ) were higher than that in the constructed wetlands planted with Phragmites australis ( P < 0.05 ). Hence, emerged plant regulate soil nitrogen removal but not affect soil CH4 emission in these systems.