Soil Microbial Abundances and Enzyme Activities in Different Rhizospheres in an Integrated Vertical Flow Constructed Wetland |
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| Authors: | Ying Ge Chongbang Zhang Yueping Jiang Chunlei Yue Qinsu Jiang Hang Min Haitian Fan Qiang Zeng Jie Chang |
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| Institution: | 1. College of Life Sciences, Zhejiang University, Hangzhou, P.R. China;2. School of Life Sciences, Taizhou University, Linhai, P.R. China;3. Zhejiang Forestry Academy, Hangzhou, P.R. China |
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| Abstract: | Rhizosphere microorganism is an important bio‐component for wastewater treatment in constructed wetlands (CWs). Microbial abundance and enzyme activities in the rhizospheres of nine plant species were investigated in an integrated vertical‐flow CW. The abundance of denitrifiers, as well as urease, acid, and alkaline phosphatase activities were positively correlated to plant root biomass. The abundance of bacteria, fungi, actinomycetes, ammonifiers, denitrifiers, and phosphorus decomposers, related to nutrient removal efficiencies in CWs, greatly varied among rhizospheres of different plant species (p < 0.05). Significant differences in rhizosphere enzyme activity among plant species were also observed (p < 0.05), with the exception of catalase activity. The principal component analysis using the data of microbial abundance and enzyme activity showed that Miscanthus floridulus, Acorus calamus, and Reineckia carnea were candidates to be used in CWs to effectively remove nitrogen and phosphorus from wastewater. |
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| Keywords: | Nitrogen Nutrient remove Phosphorus Plant species Wastewater treatment |
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