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Open AccessArticle

Simulation of Phosphorus Chemistry, Uptake and Utilisation by Winter Wheat

1
Sustainable Agriculture Sciences, Rothamsted Research, Okehampton EX20 2SB, UK
2
Sustainable Agriculture Sciences, Rothamsted Research, Harpenden AL5 2JQ, UK
*
Author to whom correspondence should be addressed.
Plants 2019, 8(10), 404; https://doi.org/10.3390/plants8100404
Received: 28 August 2019 / Revised: 22 September 2019 / Accepted: 1 October 2019 / Published: 9 October 2019
(This article belongs to the Special Issue Plant Stress Physiology Modelling)
The phosphorus (P) supply from soils is crucial to crop production. Given the complexity involved in P-cycling, a model that can simulate the major P-cycling processes and link with other nutrients and environmental factors, e.g., soil temperature and moisture, would be a useful tool. The aim of this study was to describe a process-based P module added to the SPACSYS (Soil Plant and Atmosphere Continuum System) model and to evaluate its predictive capability on the dynamics of P content in crops and the impact of soil P status on crop growth. A P-cycling module was developed and linked to other modules included in the SPACSYS model. We used a winter wheat (Triticum aestivum, cv Xi-19) field experiment at Rothamsted Research in Harpenden to calibrate and validate the model. Model performance statistics show that the model simulated aboveground dry matter, P accumulation and soil moisture dynamics reasonably well. Simulated dynamics of soil nitrate and ammonium were close to the observed data when P fertiliser was applied. However, there are large discrepancies in fields without P fertiliser. This study demonstrated that the SPACSYS model was able to investigate the interactions between carbon, nitrogen, P and water in a single process-based model after the tested P module was implemented. View Full-Text
Keywords: phosphorus cycling; SPACSYS; modelling; winter wheat phosphorus cycling; SPACSYS; modelling; winter wheat
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MDPI and ACS Style

Wu, L.; Blackwell, M.; Dunham, S.; Hernández-Allica, J.; McGrath, S.P. Simulation of Phosphorus Chemistry, Uptake and Utilisation by Winter Wheat. Plants 2019, 8, 404.

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