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Nødvendig viden om mark-emissioner for valg af biobrændsel

Carter, Mette S. and Ambus, Per (2009) Nødvendig viden om mark-emissioner for valg af biobrændsel. [Necessary knowledge on field emissions to choose between biofuels.] ICROFS nyt, October 2009, 3, pp. 5-6.

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Online at: http://www.icrofs.org

Summary

Det bliver ofte fremhævet, at CO2-udledningen kan reduceres ved at erstatte fossile brændsler med brændsler produceret på plantebiomasse. Vores studie viser dog, at der er risiko for store drivhusgasudledninger, når restaffald fra bioenergiproduktion føres tilbage til marken som gødning. Afgrøde og dyrkningspraksis påvirker størrelsen af udledningen, som i nogle tilfælde ophæver en betydelig del af drivhusgas-gevinsten forbundet med biobrændsler.

Summary translation

Replacing fossil fuel-derived energy with biomass-derived energy is commonly emphasized as a means to reduce CO2 emissions. However, our study highlights the risk of large greenhouse gas emissions when wastes from bioenergy production are recycled as fertilizer for energy crops. Crop management affects the magnitude of these emissions, which in some cases negate a considerable fraction of the global warming savings associated with biofuels.

EPrint Type:Newspaper or magazine article
Keywords:biobrændstof; drivhusgas; rug; majs; lattergas; N2O
Subjects: Soil > Nutrient turnover
Food systems > Recycling, balancing and resource management
Crop husbandry > Composting and manuring
Environmental aspects > Air and water emissions
Research affiliation: Denmark > DARCOF III (2005-2010) > BIOCONCENS - Biomass and bio-energy production in organic agriculture
Denmark > DTU, RISØ - Risø National Laboratory
Deposited By: Carter, Mette Sustmann
ID Code:16878
Deposited On:19 Mar 2010 14:04
Last Modified:30 Aug 2011 11:06
Document Language:Danish - Dansk
Status:Published
Refereed:Not peer-reviewed

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