Plant growth and nutrient removal in constructed monoculture and mixed wetlands related to stubble attributes

The aim of this study is to test the hypothesis that it depends on plant species used in the wetlands and their stubble growth attributes, as to whether monoculture or mixed wetland is superior in plant growth and nutrient removal. Monoculture and mixed wetland microcosms of five wetland plant speci...

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Bibliographic Details
Published in:Hydrobiologia 2011-02, Vol.661 (1), p.251-260
Main Authors: Qiu, Ze-Chu, Wang, Meng, Lai, Wen-Ling, He, Feng-Hua, Chen, Zhang-He
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Artificial wetlands
Biological and medical sciences
Biomass
Biomedical and Life Sciences
Chemical oxygen demand
Constructed wetland
continuous cropping
Ecology
Freshwater & Marine Ecology
Fundamental and applied biological sciences. Psychology
General aspects
Life Sciences
Mixed wetland
Monoculture
Nutrient removal
Nutrient removal rate
Plant growth
Plant species
Primary Research Paper
Stubble
Stubble growth
Synecology
Variance analysis
Wetlands
Zoology
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Summary:The aim of this study is to test the hypothesis that it depends on plant species used in the wetlands and their stubble growth attributes, as to whether monoculture or mixed wetland is superior in plant growth and nutrient removal. Monoculture and mixed wetland microcosms of five wetland plant species were studied. Significant differences in growth and aboveground biomass were found in the monoculture wetlands. Species that showed faster growth and larger biomass in monoculture wetland were also dominant in the mixed wetland. The mixed wetland exhibited similar biomass and root growth to the averages of five monocultures. ANOVA showed that there were very significant differences among the wetlands in removal rates of all the nutrients studied except nitrate nitrogen (NO₃-N) and chemical oxygen demand (COD). The removal rates from the mixed wetland were generally comparable to the highest removal rates from the monocultures. The species exhibited different stubble growth attributes, with some species showing increasing stubble growth and removal rates, while other species showing decreasing stubble growth and removal rates. The results indicated that in both monocultures and mixed constructed wetlands, growth and nutrient removal rates depended on plant species, and attributes of plant stubble growth affected overall growth and nutrient removal capabilities.
ISSN:0018-8158
1573-5117
DOI:10.1007/s10750-010-0530-2