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dc.contributor.author
Hirte, Juliane
dc.contributor.author
Richner, Walter
dc.contributor.author
Orth, Barbara
dc.contributor.author
Liebisch, Frank
dc.contributor.author
Flisch, René
dc.date.accessioned
2021-01-08T13:27:44Z
dc.date.available
2020-12-24T03:44:01Z
dc.date.available
2021-01-08T13:27:44Z
dc.date.issued
2021-02-10
dc.identifier.issn
0048-9697
dc.identifier.issn
1879-1026
dc.identifier.other
10.1016/j.scitotenv.2020.143453
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/458511
dc.identifier.doi
10.3929/ethz-b-000458511
dc.description.abstract
Phosphorus (P) management in agroecosystems is driven by opposing requirements in agronomy, ecology, and environmental protection. The widely used maintenance P fertilization strategy relies on critical concentrations of soil test P (STP), which should cause the lowest possible impact on the environment while still ensuring optimal yield. While both soil P availability and crop yields are fundamentally related to pedoclimatic conditions, little is known about the extent to which soil and climate variables control critical STP. The official P fertilization guidelines for arable crops in Switzerland are based on empirically derived critical concentrations for two soil test methods (H2O-CO2 and AAE10). To validate those values and evaluate their relation to pedoclimatic conditions, we established nonlinear multivariate multilevel yield response models fitted to long-term data from six sites. The Mitscherlich function proved most suitable out of three functions and model fit was significantly enhanced by taking the multilevel data structure into account. Yield response to STP was strongest for potato, intermediate for barley, and lowest for wheat and maize. Mean critical STP at 95% maximum yield ranged among crops from 0.15–0.58 mg kg−1 (H2O-CO2) and 0–36 mg kg−1 (AAE10). However, pedoclimatic conditions such as annual temperature or soil clay content had a large impact on critical STP, entailing changes of up to 0.9 mg kg−1 (H2O-CO2) and 80 mg kg−1 (AAE10). Critical STP for the AAE10 method was also affected by soil pH. Our findings suggest that the current Swiss fertilization guidelines overestimate actual crop P demand on average and that site conditions account for large parts of the variation in critical STP. We propose that site-specific fertilization recommendations could be improved on the basis of agro-climate classes in addition to soil information, which can help to counteract the accumulation of unutilized soil P by long-term P application.
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/4.0/
dc.subject
STP
en_US
dc.subject
Critical concentrations
en_US
dc.subject
Nonlinear mixed models
en_US
dc.subject
Multivariate analysis
en_US
dc.subject
Mitscherlich function
en_US
dc.subject
Long-term field trials
en_US
dc.title
Yield response to soil test phosphorus in Switzerland: Pedoclimatic drivers of critical concentrations for optimal crop yields using multilevel modelling
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2020-11-09
ethz.journal.title
The Science of The Total Environment
ethz.journal.volume
755
en_US
ethz.journal.abbreviated
Sci. Total Environ.
ethz.pages.start
143453
en_US
ethz.size
16 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
2020-12-24T03:44:14Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-01-08T13:27:52Z
ethz.rosetta.lastUpdated
2021-02-15T23:01:43Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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