|Authors: ||J. Vansteenkiste, J. Van Loon, R.F. Heuts, E. Schrevens, J. Diels|
|Keywords: ||simulation, cauliflower, fertilizer placement, residual nitrogen, quasi 2-D|
Field vegetable production is characterized by a high residual soil nitrate content, leading to high leaching losses.
A better understanding of the nitrogen balance under common farming practices can contribute to a more sensible nitrogen management.
Simulation models can help to achieve this goal.
In this study, a novel approach is presented to model the nitrogen uptake under broadcast and row application of fertilizer via a quasi 2-D approach.
In this approach a mechanistic 1-D soil model is supplemented with a generic crop module.
Parallel simulations are performed for a rooted field fraction and a rootless field fraction and information between these simulations is exchanged and updated on a daily basis.
Validation of this approach was done in a field experiment with cauliflower.
Via the quasi 2-D approach it was possible to simulate an increased nitrogen uptake with row application, although this was not represented in the measured data.
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