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Contribution of different cover crop species to soil organic matter fractions and N2O emissions under Norwegian cereal production

Rittl, Tatiana; Barcena, Teresa G.; Farkas, E; Henriksen, T.M.; Kjær, S.T.; Dörsch, Peter and Frøseth, Randi Berland (2023) Contribution of different cover crop species to soil organic matter fractions and N2O emissions under Norwegian cereal production. Poster at: Annual Science Days, Riga, Latvia, June 12-14, 2023.

[thumbnail of ADS_Capture_2023.pdf] PDF - Accepted Version - English
[thumbnail of Tatiana Rittl_poster_ASD_2023.pdf] PDF - Presentation - English


In Norway, cover crops were introduced to prevent loss of nitrogen and phosphorous from fields to waterways. Today, cover crops are also used to restore soil organic matter and improve soil health. Yet, the direction and magnitude of these effects are variable, and little is known about the persistence of the C derived from the cover crops in the soil. In the CAPTURE project, we evaluated the soil C sequestration potential from different cover crops used in the main cereal production areas in Norway. To do so, we used pulse labelling with 13C (CO2) to label four different cover crop species Italian ryegrass, phacelia, oilseed radish and summer vetch through their growing period. Cover crops were grown in a monoculture to enable the labelling. The results of the first year of the experiment show that cover crops produced 10- 14 Mg ha-1 above ground biomass, corresponding to 4-6 Mg C ha-1. At the end of the growing season, 3-5% of cover crop C was found in the soil particulate organic matter (POM) fraction and 2-4% in the soil mineral organic matter fraction (MAOM). In the following years, the fate of C derived from the cover crops in the soil will be determined. Furthermore, the soil C sequestration of the different cover crops will be scaled to barley plots in the same experiment, to which cover crops had been undersown in spring or summer. In these plots, N2O emissions have been measured through the whole year. The greenhouse gas trade-offs of cover crops in Norwegian cereal production will be estimated.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:CAPTURE, cover crop, N2O, dekkvekster, lystgass
Agrovoc keywords:
organic matter
Subjects: Farming Systems
Crop husbandry > Production systems > Cereals, pulses and oilseeds
Environmental aspects
Research affiliation: Norway > NMBU - Norwegian University of Life Sciences
Norway > NIBIO – Norwegian Institute of Bioeconomy Research
Norway > NORSØK - Norwegian Centre for Organic Agriculture
Deposited By: F Rittl, Tatiana
ID Code:49935
Deposited On:23 Jun 2023 09:09
Last Modified:23 Jun 2023 09:09
Document Language:English
Refereed:Peer-reviewed and accepted

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