Effects of planting method and nitrogen addition on Sphagnum growth in microcosm wetlands

In this study, we propose a method to create a Sphagnum wetland in an urban ecosystem by collecting basic information about Sphagnum growth and decomposition. We constructed six groups of Sphagnum microcosms (1 m × 1 m) with three replicates. A factorial design with two planting methods (capitulum w...

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Bibliographic Details
Published in:Paddy and water environment 2014-08, Vol.12 (Suppl 1), p.185-192
Main Authors: Kim, Sunghyun, Kim, Yongkyu, Kim, Youngjoo, Kim, Kyeonghoon, Wang, S., Kang, Hojeong, Yoo, Byungho
Format: Article
Language:English
Subjects:
Agriculture
Aquatic ecosystems
Biomedical and Life Sciences
Decomposition
Ecotoxicology
Geoecology/Natural Processes
Growing season
Hydrogeology
Hydrology/Water Resources
Life Sciences
Mosses
Nitrogen
Plant ecology
Plant growth
Primary production
Soil Science & Conservation
Sphagnum
Wetlands
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Summary:In this study, we propose a method to create a Sphagnum wetland in an urban ecosystem by collecting basic information about Sphagnum growth and decomposition. We constructed six groups of Sphagnum microcosms (1 m × 1 m) with three replicates. A factorial design with two planting methods (capitulum without stem and capitulum with stem) and three levels of nitrogen addition (0, 2, and 6 g N m −2  year −1 ) were prepared. Changes in length, dry mass, and decomposition rates of Sphagnum were monitored over a growing season. The effect of N concentration on production varied for the different planting methods. Production of Sphagnum increased with N concentration in the capitulum without the stem treatment (−D) than in the with stem treatment (+D). Adding N affected the decomposition rate in both with and without stem treatments. Decomposition rate increased with added nitrogen. Planting without stems (–D) was an effective design for a high production and low decomposition of Sphagnum . Net primary production was 187–260 g m −2  year −1 for dry mass and 15.5– 26.5 mm year −1 for length, whereas decomposition rates were 10.9–14.7 % mass loss per year. These values are comparable to those from natural bogs. The overall results indicate that constructing Sphagnum wetlands can be successfully employed as a greening technology in urban ecosystems, even in mid-latitudes.
ISSN:1611-2490
1611-2504
DOI:10.1007/s10333-014-0427-1