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dc.contributor.author
Argento, Francesco
dc.contributor.author
Liebisch, Frank
dc.contributor.author
Simmler, Michael
dc.contributor.author
Ringger, Cecil
dc.contributor.author
Hatt, Matthias
dc.contributor.author
Walter, Achim
dc.contributor.author
Anken, Thomas
dc.date.accessioned
2022-06-30T12:12:49Z
dc.date.available
2022-02-07T07:38:39Z
dc.date.available
2022-06-30T12:12:49Z
dc.date.issued
2022-03
dc.identifier.issn
1161-0301
dc.identifier.issn
1873-7331
dc.identifier.other
10.1016/j.eja.2022.126462
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/531016
dc.identifier.doi
10.3929/ethz-b-000531016
dc.description.abstract
Monitoring the spatial and temporal plant availability of nitrogen (N) in agroecosystems is a key step to improve the synchronization between N fertilizer application and crop N demand, consequently reducing the risk of N emissions to the environment. Using a winter wheat N fertilization dataset from six site-years, we linked dynamic nitrate data measured in the soil solution to standard soil and crop analyses data and multispectral imagery acquired by an unmanned aerial vehicle. Wheat N uptake was determined as remotely estimated N uptake (REN) from the spectral data with a power regression model (mean absolute error = 17 kg N ha−1). The nitrate-N in the soil solution (NSS), extracted by means of suction cups, was measured with an ion-selective electrode. The REN proved to be suitable for monitoring the accumulation of N in the plants along the season. The NSS was characterized by low values and found of limited use as a direct indicator for potentially plant-available N. The N balances resulted in N surplus in the range of 43–100 kg N ha−1 over the six site-years. The most important contribution to the N balances was the soil N supply (67–143 kg N ha−1; mineralization and atmospheric input). Including this factor in the fertilization strategy was investigated post-season by calculating the ‘adjusted N fertilization norm’, reflecting the current best fertilization practice in Switzerland. The approach suggested lower N fertilization rates in the fields with higher N surplus. However, such static empirical strategies do not allow to react to in-season changes. Sensor-based monitoring could help to overcome this shortcoming.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject
Soil N dynamics
en_US
dc.subject
N uptake
en_US
dc.subject
Nitrate-N in soil solution
en_US
dc.subject
Crop sensing
en_US
dc.subject
N balance
en_US
dc.title
Linking soil N dynamics and plant N uptake by means of sensor support
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
dc.date.published
2022-02-01
ethz.journal.title
European Journal of Agronomy
ethz.journal.volume
134
en_US
ethz.journal.abbreviated
Eur. J. agron.
ethz.pages.start
126462
en_US
ethz.size
10 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Amsterdam
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03894 - Walter, Achim / Walter, Achim
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::03894 - Walter, Achim / Walter, Achim
ethz.date.deposited
2022-02-07T07:38:51Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2022-06-30T12:12:55Z
ethz.rosetta.lastUpdated
2023-02-07T03:54:52Z
ethz.rosetta.versionExported
true
ethz.COinS
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