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Determination of greenhouse gas sources and sinks in Swiss arable soils under organic and non-organic management

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Skinner, Colin; Krauss, M.; Krause, H.M.; Mäder, P. and Gattinger, A. (2019) Determination of greenhouse gas sources and sinks in Swiss arable soils under organic and non-organic management. In: Agroscope, FiBL, ETH (Eds.) Program and abstract book. Comparing organic and conventional agricultural cropping systems - What can be learned from the DOK and other long-term trials? Congressi Stefano Franscini, Monte Verità, Ascona, Switzerland, October 6-10, 2019, p. 98.

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Summary

Agricultural practices contribute considerably to emissions of greenhouse gases (GHG). Knowledge on the impact of organic (ORG) compared to non-organic (NON-ORG) farming on soil-derived nitrous oxide (N2O) and methane (CH4) emissions is still limited. We conducted a literature search on measured soil GHG fluxes under ORG and NON-ORG from farming system comparisons and performed a meta-analysis. Based on 12 studies covering annual measurements, it appeared that area-scaled N2O emissions are with 14% significantly lower under ORG. However, yield-scaled N2O emissions are only 9% higher for ORG. Emissions from NON-ORG soils seemed to be influenced mainly by total N inputs, whereas for ORG other soil characteristics seemed to be more important because N2O from organic N fertilisers emits decoupled from the inputs. Furthermore, we observed a 12% higher CH4 uptake for arable soils under ORG.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:soil sciences, long-term experiments, DOK, greenhouse gas, emissions, BIODYN, BIOORG, CONMIN, CONFYM, NOFERT
Subjects: Knowledge management > Research methodology and philosophy > Systems research and participatory research
Environmental aspects > Air and water emissions
Soil
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil Sciences
Germany > University of Gießen
Switzerland > Other organizations
Related Links:https://www.fibl.org.live.fibl.info/en/locations/switzerland/work-areas-switzerland/soil-sciences.html
Deposited By: Mäder, Paul
ID Code:36905
Deposited On:05 Dec 2019 12:13
Last Modified:05 Dec 2019 12:14
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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