title: Growth and nutrient removal of three macrophytes in response to concentrations and ratios of N and P.
abstract: Wastewater from different sources shows great differences in concentrations and ratios of N and P. In order to choose suitable plant species to remove excess N and/or P from polluted waters, it is important to know the performances of these plants under different N and P concentrations. In this study, we investigated the growth and N and P removal rate of three macrophytes, Coix lacryma-jobi, Iris wilsonii, and Arundo donax under six N and P combination treatments. C. lacryma-jobi preferred higher N and P concentrations (16 mg N L-1and 3.2 mg P L-1), and increasing N supply could increase its P removal rate. I. wilsonii exhibited a growth preference at a combination of moderate N and P concentrations (8 mg N L-1and 0.8 mg P L-1). A. donax could grow well at all combinations of N and P and had significantly higher relative growth rate and N and P removal rates than the other two species. These results showed A. donax is a promising species to treat various polluted waters and the other two species can be used specifically to treat certain types of wastewater.
authors.affiliation: a Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain , Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences , Guilin , P.R. China.
authors.forename: JianXiong
authors.initials: J
authors.lastname: Liao
authors.affiliation: a Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain , Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences , Guilin , P.R. China.
authors.forename: DeNan
authors.initials: D
authors.lastname: Zhang
authors.affiliation: b Department of Biology , Lakehead University , Thunder Bay , Ontario , Canada.
authors.forename: Azim
authors.initials: A
authors.lastname: Mallik
authors.affiliation: a Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain , Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences , Guilin , P.R. China.
authors.forename: YuQing
authors.initials: Y
authors.lastname: Huang
authors.affiliation: a Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain , Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences , Guilin , P.R. China.
authors.forename: ChengXin
authors.initials: C
authors.lastname: He
authors.affiliation: a Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain , Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences , Guilin , P.R. China.
authors.forename: GuangPing
authors.initials: G
authors.lastname: Xu
mesh_terms: D001673:Biodegradation, Environmental; D031742:Coix; D009584:Nitrogen; D010758:Phosphorus; D006109:Poaceae; D062065:Wastewater
chemical_list: D009584:Nitrogen; D010758:Phosphorus; D062065:Wastewater
keywords: Arundo donax; Coix lacryma-jobi; Iris wilsonii; N and P removal; biomass; relative growth rate