Title: Simulation of nitrogen balance of maize field under different strategies using DRAINMOD-N model
Authors: El-Sadek, Alaa ×
Feyen, Jan
Ragab, R #
Issue Date: 2002
Publisher: John Wiley & Sons
Series Title: Irrigation and Drainage vol:51 issue:1 pages:61-75
Abstract: Denitrification is the process by which nitrate-nitrogen is converted to nitrogen gas by soil microorganisms when soil oxygen is low or absent. The process of denitrification is important in preventing high agriculture-source nitrate loads from entering and polluting rivers. The aim of the research was to examine if the NO3-N concentration in drain water of agricultural fields can be kept below the EU limit of 11.3 mg l(-1) by controlling the denitrification process through management of the water table level. As such the research focused on the determination of the exact denitrification amount to achieve both, limitation of the NO3-N leaching and optimisation of the nitrogen-nitrate uptake by the crop. The method used in this study is based on the nitrogen version of DRAINMOD model. This model was used to simulate the performance of the drainage system using two drainage strategies (conventional and controlled) at the Hooibeekhoeve experiment, situated in the sandy region of the Kempen (Belgium), and this for a 14-year (1985-1998) period. In the analysis a continuous cropping with maize was assumed. Daily NO3-N losses were predicted for a range of drain spacings. The study illustrated that the denitrification process has a very strong impact on the amount of nitrate that can be leached to ground and surface waters. The results have also shown that if the water table elevation is properly controlled, one should be able to strike the delicate balance between our need for maximum yield production and a minimum hazard to our environment.
ISSN: 1531-0353
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Faculty of Bioscience Engineering
Division Soil and Water Management
× corresponding author
# (joint) last author

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