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Estimating the envi...
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Tidåker, PernillaRISE,JTI Institutet för Jordbruks- och Miljöteknik,Swedish Institute of Agricultural and Environmental Engineering (JTI)
(author)
Estimating the environmental footprint of barley with improved nitrogen uptake efficiency—a Swedish scenario study
- Article/chapterEnglish2016
Publisher, publication year, extent ...
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Elsevier BV,2016
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:ri-27878
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https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-27878URI
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https://doi.org/10.1016/j.eja.2016.06.013DOI
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https://res.slu.se/id/publ/77458URI
Supplementary language notes
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Language:English
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Summary in:English
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Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Plant breeding is a powerful tool for improving nitrogen (N) uptake efficiency and thus reducing the environmental impact relating to crop production. This study evaluated the environmental impact of current barley production systems in two Swedish agricultural areas (South and East) compared with scenarios with improved N uptake efficiency at two levels, in which the fraction of mineral N available for daily crop uptake was increased by 50 and 100%. Life cycle assessment (LCA) methodology was used to quantify energy use, global warming potential (GWP) and acidification and eutrophication potentials along the production chain for spring barley with differing N uptake efficiency, but similar N application rate. The functional unit, to which all energy use and emissions were related, was 1 Mg barley grain. Energy use, GWP and acidification proved to be higher for the East production system, mainly due to lower yield, while eutrophication was higher for South. The two impacts most affected by improved N uptake efficiency were eutrophication and GWP, with GWP decreasing due to a combination of higher yield, soil carbon sequestration and lower indirect emissions of N2O due to lower N leaching. Accounting for land savings due to increased yield, reducing the pressure to transform land elsewhere, would further lower the carbon footprint. Potential eutrophication per Mg grain was reduced by 15% in the production system with the highest N uptake efficiency in southern Sweden. Crops with improved N uptake efficiency can thus be an important complementary measure for reducing N losses to water, provided that the N application rate does not increase. However, incentives for farmers to maintain or even lower the N application rate might be required. Using simulation modelling is a promising approach for assessment of expected effects of improved crop varieties when no long-term experimental data are available. However, advanced crop models are required to better reflect the effect of plant breeding on e.g. expected yield. Future model development should involve expertise in plant breeding, plant physiology and dynamic crop and soil modelling.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Bergkvist, GöranSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtproduktionsekologi,Department of Crop Production Ecology,SLU Swedish University of Agricultural Sciences, Sweden(Swepub:slu)50573
(author)
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Bolinder, MartinSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology,SLU Swedish University of Agricultural Sciences, Sweden(Swepub:slu)50140
(author)
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Eckersten, HenrikSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtproduktionsekologi,Department of Crop Production Ecology,SLU Swedish University of Agricultural Sciences, Sweden(Swepub:slu)48824
(author)
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Johnsson, HolgerSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment,SLU Swedish University of Agricultural Sciences, Sweden(Swepub:slu)50770
(author)
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Kätterer, ThomasSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology,SLU Swedish University of Agricultural Sciences, Sweden(Swepub:slu)48437
(author)
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Weih, MartinSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtproduktionsekologi,Department of Crop Production Ecology,SLU Swedish University of Agricultural Sciences, Sweden(Swepub:slu)49551
(author)
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RISEJTI Institutet för Jordbruks- och Miljöteknik
(creator_code:org_t)
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Sveriges lantbruksuniversitet
Related titles
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In:European Journal of Agronomy: Elsevier BV80, s. 45-541161-03011873-7331
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