Ecosystem C and N dynamics affected by a modified spring barley trait with increased nitrogen use - a simulation case study

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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 (author)

Ecosystem C and N dynamics affected by a modified spring barley trait with increased nitrogen use - a simulation case study

Article/chapterEnglish2018

Publisher, publication year, extent ...

2017-10-09
Taylor & Francis,2018
printrdacarrier

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LIBRIS-ID:oai:DiVA.org:hig-25408
https://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-25408URI
https://doi.org/10.1080/09064710.2017.1385835DOI
https://res.slu.se/id/publ/94663URI

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Language:English
Summary in:English

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SwePubSwePub

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Subject category:ref swepub-contenttype
Subject category: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)
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.

Subject headings and genre

SAMHÄLLSVETENSKAP Ekonomi och näringsliv Nationalekonomi hsv//swe
SOCIAL SCIENCES Economics and Business Economics hsv//eng
NATURVETENSKAP Biologi Ekologi hsv//swe
NATURAL SCIENCES Biological Sciences Ecology hsv//eng
LANTBRUKSVETENSKAPER Lantbruksvetenskap, skogsbruk och fiske Jordbruksvetenskap hsv//swe
AGRICULTURAL SCIENCES Agriculture, Forestry and Fisheries Agricultural Science hsv//eng
LANTBRUKSVETENSKAPER Lantbruksvetenskap, skogsbruk och fiske Markvetenskap hsv//swe
AGRICULTURAL SCIENCES Agriculture, Forestry and Fisheries Soil Science hsv//eng
Plant breeding; N uptake; N utilisation; N leaching; SOC; sandy loam; Sweden

Added entries (persons, corporate bodies, meetings, titles ...)

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 (author)
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 (author)
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 (author)
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 (author)
Sveriges lantbruksuniversitetInstitutionen för växtproduktionsekologi (creator_code:org_t)
Sveriges lantbruksuniversitet

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In:Acta Agriculturae Scandinavica - Section B: Taylor & Francis68:3, s. 230-2420906-47101651-1913

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SOCIAL SCIENCES: SOCIAL SCIENCES; and Economics and Bu ...; and Economics

NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Ecology

AGRICULTURAL SCIENCES: AGRICULTURAL SCI ...; and Agriculture Fore ...; and Agricultural Sci ...

AGRICULTURAL SCIENCES: AGRICULTURAL SCI ...; and Agriculture Fore ...; and Soil Science

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