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  CO2 exchange and carbon balance in two grassland sites on eutrophic drained peat soils

Veenendaal, E. M., Kolle, O., Leffelaar, P. A., Schrier-Uijl, A. P., Van Huissteden, J., Van Walsem, J., et al. (2007). CO2 exchange and carbon balance in two grassland sites on eutrophic drained peat soils. Biogeosciences, 4(6), 1027-1040. doi:10.5194/bg-4-1027-2007.

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http://dx.doi.org/10.5194/bg-4-1027-2007 (Verlagsversion)
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 Urheber:
Veenendaal, E. M., Autor
Kolle, O.1, Autor           
Leffelaar, P. A., Autor
Schrier-Uijl, A. P., Autor
Van Huissteden, J., Autor
Van Walsem, J., Autor
Moeller, F., Autor
Berendse, F., Autor
Affiliations:
1Service Facility Field Measurements & Instrumentation, O. Kolle, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497769              

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Schlagwörter: ECOSYSTEM-ATMOSPHERE EXCHANGE; DIOXIDE EXCHANGE; INTERANNUAL VARIABILITY; SPATIAL VARIABILITY; SEASONAL-VARIATION; METHANE EMISSIONS; FLUX MEASUREMENTS; WET GRASSLANDS; WATER-VAPOR; NET CARBON
 Zusammenfassung: In this study we investigated the role of intensive and extensive dairy farm practices on CO2 exchange and the carbon balance of peatlands by means of eddy covariance (EC) measurements. Year long EC measurements were made in two adjacent farm sites on peat soil in the western part of the Netherlands. One site (Stein) is a new meadow bird reserve and is managed predominantly by mowing in June and August. The second site (Oukoop) is an intensive dairy farm. Maximum photosynthetic uptake of the grass sward (range 2 to 34 mu mol CO2 m(-2) s(-1)) showed a close and similar linear relationship with Leaf Area Index (LAI; range 1 to 5) except in maturing hay meadows, where maximum photosynthetic uptake did not increase further. Apparent quantum yield varied between 0.02 and 0.08 (mean 0.045) mu mol CO2 mu mol(-1) photons at both sites and was significantly correlated with LAI during the growth season. Ecosystem Respiration at 10 degrees C (R-10) calculated from the year round data set was 3.35 mu mol CO2 m(-2) s(-1) at Stein and 3.69 mu mol CO2 m(-2) s(-1) at Oukoop. Both sites were a source of carbon in winter and a sink during summer with net ecosystem exchange varying between 50 to 100 mmol CO2 m(-2) d(-1) in winter to below -400 mmol CO2 m(-2) d(-1) in summer. Periodically, both sites became a source after mowing. Net annual ecosystem exchange (NEE) for Stein was -5.7 g C m(-2) a(-1) and for Oukoop 133.9 g C m(-2) a(-1). When biomass removal, manure applications and estimates of methane emissions ware taken into account, both eutrophic peat meadows are a strong source for C around 420 g C m(-2) a(-1).

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Sprache(n): eng - English
 Datum: 2007
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: ISI: ://000251998600006
Anderer: BGC1059
DOI: 10.5194/bg-4-1027-2007
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Titel: Biogeosciences
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Katlenburg-Lindau, Germany : Copernicus GmbH on behalf of the European Geosciences Union
Seiten: - Band / Heft: 4 (6) Artikelnummer: - Start- / Endseite: 1027 - 1040 Identifikator: CoNE: https://pure.mpg.de/cone/journals/resource/111087929276006
ISSN: 1726-4170