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Soil C balances in Swedish agricultural soils 1990-2004, with preliminary projections

Andrén, Olof and Kätterer, Thomas and Karlsson, Thord and Eriksson, Jan (2008). Soil C balances in Swedish agricultural soils 1990-2004, with preliminary projections. Nutrient cycling in agroecosystems. 81:2, 129-144
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Official URL: http://dx.doi.org/10.1007/s10705-008-9177-z

Abstract

Swedish agricultural land comprises about 3 Mha and its topsoil contains about 270 Mt C (0-25 cm depth). Based on daily climate data, annual yield data and a soil database, we calculate the topsoil C dynamics for Swedish agricultural land 1990-2004, using a soil C balance model, ICBM. Losses from high C (organic) soils are calculated from subsidence, which in turn is calculated from soil properties, cropping system and weather conditions. We also present scenarios and projections into the future. Mineral soils are close to balance in all of the eight agricultural regions investigated. Average soil C mass roughly increases from South to North, since the lower yields and thus C inputs in Northern regions are more than balanced by the higher decomposition rates due to warmer climate in the South. The higher proportion of grass leys in the North also contributes to higher C mass. High C soils (>7% C, corresponding to 12% soil organic matter content) lose 2-6 t C ha-1 yr-1, depending on weather and cropping system, and total annual loss from Swedish agricultural high-C soils is about 1 Mt yr-1. This loss is discussed in the context of plant production and remedial actions. Projections into the future, assuming that a temperature increase leading to increased decomposition rates also will lead to higher yields, indicate a potential to at least maintain soil C mass in Swedish agricultural mineral soils. Growing crops with residues more resistant towards decomposition would be an efficient way to increase soil C mass.

Authors/Creators:Andrén, Olof and Kätterer, Thomas and Karlsson, Thord and Eriksson, Jan
Title:Soil C balances in Swedish agricultural soils 1990-2004, with preliminary projections
Series/Journal:Nutrient cycling in agroecosystems (1385-1314)
Year of publishing :2008
Volume:81
Number:2
Page range:129-144
Publisher:Springer Verlag
ISSN:1385-1314
Language:English
Additional Information:The original publication is available at www.springerlink.com
Publication Type:Journal article
Refereed:Yes
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Soil science
Keywords:Agriculture, Carbon, Budget, Sequestration, National
URN:NBN:urn:nbn:se:slu:epsilon-1-82
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-1-82
ID Code:3408
Department:(NL, NJ) > Dept. of Soil Sciences
(NL, NJ) > Dept. of Economics
Deposited By: Harriet Thuné
Deposited On:17 Nov 2008 00:00
Metadata Last Modified:02 Dec 2014 10:21

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