文章基本信息

标题：Effect of plant species on denitrification and methane emission in constructed wetlands. (Soil--Water--Wetlands 09:00 AM, Saturday, April 5, 2003 Brewer/Frost Science 138 Mr. James J. Hoorman-Presiding).
作者：Smialek, Jamie ; Bouchard, Virginie ; Quigley, Martin 等
期刊名称：The Ohio Journal of Science
印刷版ISSN：0030-0950
出版年度：2003
期号：March
语种：English
出版社：Ohio Academy of Science
摘要：Wetlands' ability to retain excess nutrients in waterways at low costs makes them an attractive method of controlling agricultural non-point source pollution. However, it is estimated that wetlands contribute more than 40% of the annual atmospheric methane (C[H.sub.4]) loading. Vegetation is an important factor in controlling methane emissions by contributing organic matter to the sediments, creating oxidized sediments, and acting as conduits for gas escape into the atmosphere. The objective of this project was to examine how vegetation can be utilized to construct a treatment wetland that has a maximum rate of denitrification and a minimum rate of methane emission. This research was conducted May-November 2002 on a constructed treatment wetland at Waterman Farm on the Columbus campus of Ohio State University. Measurements of C[H.sub.4] and C[O.sub.2] production and emission, denitrification, plant biomass, and nutrient concentration were estimated in 15 unplanted plots, 15 planted with woody (Salix) species, and 15 herbaceous (Juncus) plots. Water quality improvement by denitrification was evident along the wetland. At 15 cm below the sediment, C[O.sub.2] concentration averaged 7300-9200 ppm, higher than C[H.sub.4] (1200-4800ppm). C[H.sub.4] concentrations were significantly different between Juncus (1200ppm) and Salix (4800ppm) species. During evening hours, Juncus emission of C[O.sub.2] and C[H.sub.4] was 3-4 times higher than Salix; however, during morning hours Juncus species decrease their emission and Salix species emit 3-4 times more gas. The selection of specific plants could be used as a design tool in constructed wetlands to limit greenhouse gas emissions.
关键词：Environmental research;Wetland ecology;Wetlands

Effect of plant species on denitrification and methane emission in constructed wetlands. (Soil--Water--Wetlands 09:00 AM, Saturday, April 5, 2003 Brewer/Frost Science 138 Mr. James J. Hoorman-Presiding).

Smialek, Jamie ; Bouchard, Virginie ; Quigley, Martin 等

10:30

Wetlands' ability to retain excess nutrients in waterways at low costs makes them an attractive method of controlling agricultural non-point source pollution. However, it is estimated that wetlands contribute more than 40% of the annual atmospheric methane (C[H.sub.4]) loading. Vegetation is an important factor in controlling methane emissions by contributing organic matter to the sediments, creating oxidized sediments, and acting as conduits for gas escape into the atmosphere. The objective of this project was to examine how vegetation can be utilized to construct a treatment wetland that has a maximum rate of denitrification and a minimum rate of methane emission. This research was conducted May-November 2002 on a constructed treatment wetland at Waterman Farm on the Columbus campus of Ohio State University. Measurements of C[H.sub.4] and C[O.sub.2] production and emission, denitrification, plant biomass, and nutrient concentration were estimated in 15 unplanted plots, 15 planted with woody (Salix) species, and 15 herbaceous (Juncus) plots. Water quality improvement by denitrification was evident along the wetland. At 15 cm below the sediment, C[O.sub.2] concentration averaged 7300-9200 ppm, higher than C[H.sub.4] (1200-4800ppm). C[H.sub.4] concentrations were significantly different between Juncus (1200ppm) and Salix (4800ppm) species. During evening hours, Juncus emission of C[O.sub.2] and C[H.sub.4] was 3-4 times higher than Salix; however, during morning hours Juncus species decrease their emission and Salix species emit 3-4 times more gas. The selection of specific plants could be used as a design tool in constructed wetlands to limit greenhouse gas emissions.

JAMIE SMIALEK (1) SMIALEK.2@OSU.EDU, VIRGINIE BOUCHARD (1) MARTIN QUIGLEY (2), TIMOTHY GRANATA (3), JAY MARTIN (4), LARRY BROWN (4), OHIO STATE UNIVERSITY, (1) SCHOOL OF NATURAL RESOURCES AND ENVIRONMENTAL SCIENCE GRADUATE PROGRAM, 2021 COFFEY RD, COLUMBUS OH 43210, (2) HORTICULTURE AND CROP SCIENCE, (3) CIVIL AND ENVIRONMENTAL ENGINEERING AND GEODETIC SCIENCES, (4) FOOD, AGRICULTURAL, AND BIOLOGICAL ENGINEERING