Methane emissions and growth of Spartina patens in response to soil redox intensity

Journal Article · · Soil Science Society of America Journal; (United States)

DOI:https://doi.org/10.2136/sssaj1994.03615995005800060037x· OSTI ID:6726447

Kludze, H K; DeLaune, R D ^[1]

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1. Louisiana State Univ., Baton Rouge, LA (United States)

Laboratory experiments were conducted to determine the influence of soil redox intensity (Eh) on the growth, root porosity (POR), radial O[sub 2] loss, and methane production, oxidation, and emission in Spartina patens (Aiton) Muhlenb. (salt meadow cordgrass). Plants were grown for 50 d in a Mississippi alluvial soil under controlled Eh values of 200, [minus]200, and [minus]300 mV. Plant growth decreased with increase in Eh intensity. Root dry weight decreased by 37% and shoot dry weights by 25% between the soil redox intensity treatments of 200 and [minus]300 mV. Root air space formation was enhanced by a decrease in Eh up to about 30 d when further development appeared to cease and levelled off in all the redox treatments. Methane production was generally enhanced by the intensity of reduction. Plant-mediated emissions were commensurate with production levels but were influenced by plant related factors, especially POR. No differences (P < 0.05) existed between emissions in light and in the dark, which suggests a lack of stomatal influence on methane emissions from S. patens. Plant-mediated methane oxidation was higher at [minus]200 mV that at [minus]300 mV by a factor of 16%. 53 refs., 4 figs., 3 tabs.

• OSTI ID: 6726447
• Journal Information: Soil Science Society of America Journal; (United States), Journal Name: Soil Science Society of America Journal; (United States) Vol. 58:6; ISSN 0361-5995; ISSN SSSJD4
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540110*
540120 -- Environment
Atmospheric-- Chemicals Monitoring &amp; Transport-- (1990-)
550200 -- Biochemistry
59 BASIC BIOLOGICAL SCIENCES
ALKANES
AQUATIC ECOSYSTEMS
CLIMATIC CHANGE
COMPILED DATA
DATA
ECOSYSTEMS
GRAMINEAE
GREENHOUSE EFFECT
GROWTH
HYDROCARBONS
INFORMATION
LILIOPSIDA
MAGNOLIOPHYTA
METHANE
NUMERICAL DATA
ORGANIC COMPOUNDS
PLANTS
REDOX PROCESS
REPROCESSING
SEPARATION PROCESSES
SOILS
WETLANDS