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Methane fluxes from a rewetted agricultural fen during two initial years of paludiculture

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Methane fluxes from a rewetted agricultural fen during two initial years of paludiculture. / Kandel, Tanka P.; Karki, Sandhya; Elsgaard, Lars et al.

In: Science of the total Environment, Vol. 713, 136670, 15.04.2020.

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Kandel, Tanka P. ; Karki, Sandhya ; Elsgaard, Lars et al. / Methane fluxes from a rewetted agricultural fen during two initial years of paludiculture. In: Science of the total Environment. 2020 ; Vol. 713.

Bibtex

@article{901a893fd7614fa9a6dea5a2fed373fa,
title = "Methane fluxes from a rewetted agricultural fen during two initial years of paludiculture",
abstract = "Rewetting agricultural peatland abates carbon dioxide (CO2) emission, but the resulting waterlogged anaerobic soil condition may create hotspots of methane (CH4) emissions. In this study, we measured CH4 emissions from side-by-side replicated plots in an agricultural fen cultivated with reed canary grass under a control and two experimental rewetting (i.e., paludiculture) conditions as either continuously flooded to soil surface or semi-flooded where water from the flooded plots intruded from sub-surface. Fluxes were measured for two successive years at 1–2 week intervals (total 59 measurement dates) using static chambers. Annual emissions were estimated by trapezoidal linear interpolation of the measured fluxes between the measurement dates. Two-year time-weighted average ground water tables (GWT) in the flooded, semi-flooded and control plots were 1, 3 and 9 cm below soil surface, respectively. The annual average emissions from flooded plots were 82 and 116 g CH4 m−2 yr−1 in Year 1 and 2, respectively, which were significantly higher than the emissions from semi-flooded plots (35 and 69 g CH4 m−2 yr−1 in Year 1 and 2, respectively) and from control plots (3 and 9 g CH4 m−2 yr−1 in Year 1 and 2, respectively). Overall, the results showed that the GWT in paludiculture should be maintained few cm below soil surface during high temperature periods to prevent risks of high CH4 emissions.",
keywords = "Ground water table, Methane dynamics, Paludiculture, Peatland restoration",
author = "Kandel, {Tanka P.} and Sandhya Karki and Lars Elsgaard and Rodrigo Labouriau and L{\ae}rke, {Poul Erik}",
year = "2020",
month = apr,
day = "15",
doi = "10.1016/j.scitotenv.2020.136670",
language = "English",
volume = "713",
journal = "Science of the Total Environment",
issn = "0048-9697",
publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - Methane fluxes from a rewetted agricultural fen during two initial years of paludiculture

AU - Kandel, Tanka P.

AU - Karki, Sandhya

AU - Elsgaard, Lars

AU - Labouriau, Rodrigo

AU - Lærke, Poul Erik

PY - 2020/4/15

Y1 - 2020/4/15

N2 - Rewetting agricultural peatland abates carbon dioxide (CO2) emission, but the resulting waterlogged anaerobic soil condition may create hotspots of methane (CH4) emissions. In this study, we measured CH4 emissions from side-by-side replicated plots in an agricultural fen cultivated with reed canary grass under a control and two experimental rewetting (i.e., paludiculture) conditions as either continuously flooded to soil surface or semi-flooded where water from the flooded plots intruded from sub-surface. Fluxes were measured for two successive years at 1–2 week intervals (total 59 measurement dates) using static chambers. Annual emissions were estimated by trapezoidal linear interpolation of the measured fluxes between the measurement dates. Two-year time-weighted average ground water tables (GWT) in the flooded, semi-flooded and control plots were 1, 3 and 9 cm below soil surface, respectively. The annual average emissions from flooded plots were 82 and 116 g CH4 m−2 yr−1 in Year 1 and 2, respectively, which were significantly higher than the emissions from semi-flooded plots (35 and 69 g CH4 m−2 yr−1 in Year 1 and 2, respectively) and from control plots (3 and 9 g CH4 m−2 yr−1 in Year 1 and 2, respectively). Overall, the results showed that the GWT in paludiculture should be maintained few cm below soil surface during high temperature periods to prevent risks of high CH4 emissions.

AB - Rewetting agricultural peatland abates carbon dioxide (CO2) emission, but the resulting waterlogged anaerobic soil condition may create hotspots of methane (CH4) emissions. In this study, we measured CH4 emissions from side-by-side replicated plots in an agricultural fen cultivated with reed canary grass under a control and two experimental rewetting (i.e., paludiculture) conditions as either continuously flooded to soil surface or semi-flooded where water from the flooded plots intruded from sub-surface. Fluxes were measured for two successive years at 1–2 week intervals (total 59 measurement dates) using static chambers. Annual emissions were estimated by trapezoidal linear interpolation of the measured fluxes between the measurement dates. Two-year time-weighted average ground water tables (GWT) in the flooded, semi-flooded and control plots were 1, 3 and 9 cm below soil surface, respectively. The annual average emissions from flooded plots were 82 and 116 g CH4 m−2 yr−1 in Year 1 and 2, respectively, which were significantly higher than the emissions from semi-flooded plots (35 and 69 g CH4 m−2 yr−1 in Year 1 and 2, respectively) and from control plots (3 and 9 g CH4 m−2 yr−1 in Year 1 and 2, respectively). Overall, the results showed that the GWT in paludiculture should be maintained few cm below soil surface during high temperature periods to prevent risks of high CH4 emissions.

KW - Ground water table

KW - Methane dynamics

KW - Paludiculture

KW - Peatland restoration

UR - http://www.scopus.com/inward/record.url?scp=85077944722&partnerID=8YFLogxK

U2 - 10.1016/j.scitotenv.2020.136670

DO - 10.1016/j.scitotenv.2020.136670

M3 - Journal article

C2 - 32019030

AN - SCOPUS:85077944722

VL - 713

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

M1 - 136670

ER -