Carbon turnover in a crop rotation under free air CO 2 enrichment (FACE)
Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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in: Pedosphere, Jahrgang 15, Nr. 6, 01.12.2005, S. 728-738.
Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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TY - JOUR
T1 - Carbon turnover in a crop rotation under free air CO 2 enrichment (FACE)
AU - Weigel, Hans-Joachim
AU - Pacholski, A.
AU - Burkart, S.
AU - Helal, M.
AU - Heinemeyer, Otto
AU - Kleikamp, B.
AU - Manderscheid, Remigius
AU - Frühauf, Cathleen
AU - Hendrey, G.F.
AU - Lewin, K.
AU - Nagy, J.
PY - 2005/12/1
Y1 - 2005/12/1
N2 - Mostly based on assumptions derived from controlled-environment studies, predicted future atmospheric CO 2 concentrations [CO 2] are expected to have considerable impacts on carbon (C) turnover in agro-ecosystems. In order to allow the in situ examination of C-transformations in the plant-soil system of arable crop rotations under future [CO 2], a free air carbon dioxide enrichment (FACE) experiment (550 μmol mol -1 CO 2) was started at Braunschweig, Germany in 1999. The crop rotation under investigation comprised winter barley, a cover crop (ryegrass), sugar beets and winter wheat. Assessments of CO 2 effects included the determination of above- and belowground biomass production, measurements of canopy CO 2- and H 2O- fluxes, soil microbial biomass and in situ soil respiration. The results obtained during the 1st crop rotation cycle (3 years) showed that for the selected crops elevated [CO 2] entailed significant positive effects (P < 0.05) on aboveground (6%-14% stimulation) and belowground biomass production (up to 90% stimulation), while canopy evapotranspiration was reduced. This resulted in increased soil water content. Also, depending on crop type and season, high CO 2 stimulated in situ soil respiration (up to 30%), while soil microbial biomass did not show significant responses to elevated [CO 2] during the first rotation cycle.
AB - Mostly based on assumptions derived from controlled-environment studies, predicted future atmospheric CO 2 concentrations [CO 2] are expected to have considerable impacts on carbon (C) turnover in agro-ecosystems. In order to allow the in situ examination of C-transformations in the plant-soil system of arable crop rotations under future [CO 2], a free air carbon dioxide enrichment (FACE) experiment (550 μmol mol -1 CO 2) was started at Braunschweig, Germany in 1999. The crop rotation under investigation comprised winter barley, a cover crop (ryegrass), sugar beets and winter wheat. Assessments of CO 2 effects included the determination of above- and belowground biomass production, measurements of canopy CO 2- and H 2O- fluxes, soil microbial biomass and in situ soil respiration. The results obtained during the 1st crop rotation cycle (3 years) showed that for the selected crops elevated [CO 2] entailed significant positive effects (P < 0.05) on aboveground (6%-14% stimulation) and belowground biomass production (up to 90% stimulation), while canopy evapotranspiration was reduced. This resulted in increased soil water content. Also, depending on crop type and season, high CO 2 stimulated in situ soil respiration (up to 30%), while soil microbial biomass did not show significant responses to elevated [CO 2] during the first rotation cycle.
KW - Ecosystems Research
KW - Agroecosystems
KW - Carbon
KW - Elevated CO
KW - FACE
KW - Soil
UR - http://www.scopus.com/inward/record.url?scp=28844455007&partnerID=8YFLogxK
M3 - Journal articles
AN - SCOPUS:28844455007
VL - 15
SP - 728
EP - 738
JO - Pedosphere
JF - Pedosphere
SN - 1002-0160
IS - 6
ER -