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Open AccessArticle

Simulation of Phosphorus Chemistry, Uptake and Utilisation by Winter Wheat

Sustainable Agriculture Sciences, Rothamsted Research, Okehampton EX20 2SB, UK
Sustainable Agriculture Sciences, Rothamsted Research, Harpenden AL5 2JQ, UK
Author to whom correspondence should be addressed.
Plants 2019, 8(10), 404;
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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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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