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Ecosystem C and N d...
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Eckersten, HenrikSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtproduktionsekologi,Department of Crop Production Ecology,Department of Crop Production Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
(författare)
Ecosystem C and N dynamics affected by a modified spring barley trait with increased nitrogen use - a simulation case study
- Artikel/kapitelEngelska2018
Förlag, utgivningsår, omfång ...
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2017-10-09
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Taylor & Francis,2018
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:hig-25408
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https://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-25408URI
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https://doi.org/10.1080/09064710.2017.1385835DOI
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https://res.slu.se/id/publ/94663URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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Mistra Biotech research programme (Biotechnology for Sustainable and Competitive Agriculture and Food Systems) - Mistra (the Swedish Foundation for Strategic Environmental Research)
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To what extent might a crop with increased plant N uptake efficiency and/or N demand increase plant biomass and soil carbon storage, decrease N leaching, and reduce the need for N fertilisation? This was assessed for a fertilised sandy loam site in central Sweden cultivated with spring barley for a four year period using a process based crop and soil simulation model (SOILN) calibrated to fit observations of field experiments with non-modified crops. Crop properties were changed in accordance with previous model applications to other crops with higher N uptake and utilisation efficiencies, to resemble potential effects of breeding. For the modified crops a doubling of daily uptake efficiency of soil mineral N and/or increase of radiation use efficiency by 30%, increased plant biomass by 3%-30%, decreased N leaching by 1%-30% and increased soil organic carbon (SOC) content by 1-12 g C m-2 year-1. The larger changes were mainly due to increased uptake efficiency. Fertilisation of the modified spring barley crop could be reduced while still producing the same plant biomass as the non-modified crop. The plant biomass to N leaching ratio of the modified crops increased. The simulated changes in plant biomass and SOC were sensitive to weather conditions suggesting that in situ experiments would need to cover a large range of weather conditions to evaluate the performance of new crop traits under climatic variability. The study suggests a strong need that field experiments are accompanied with model applications, when exploring the potential of the modified crops under variable conditions.
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Marstorp, HåkanSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment,Department of Soil and Environment, Swedish University of Agricultural Sciences, Uppsala, Sweden(Swepub:slu)50166
(författare)
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Collentine, DennisSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Högskolan i Gävle,Nationalekonomi,Department of Soil and Environment, Swedish University of Agricultural Sciences, Uppsala, Sweden,Institutionen för mark och miljö,University of Gävle(Swepub:slu)48678
(författare)
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Johnsson, HolgerSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment,Department of Soil and Environment, Swedish University of Agricultural Sciences, Uppsala, Sweden(Swepub:slu)50770
(författare)
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Kätterer, ThomasSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology,Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden(Swepub:slu)48437
(författare)
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Sveriges lantbruksuniversitetInstitutionen för växtproduktionsekologi
(creator_code:org_t)
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Sveriges lantbruksuniversitet
Sammanhörande titlar
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Ingår i:Acta Agriculturae Scandinavica - Section B: Taylor & Francis68:3, s. 230-2420906-47101651-1913
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