Coupling of a nitrate production model with HYDRUS to predict nitrate leaching

J.-P. Matteau, S.J. Gumiere, J. Gallichand, G. Létourneau, L. Khiari, M.-O. Gasser and A. Michaud

Agricultural Water Management, 2019, vol. 213, issue C, 616-626

Abstract: Losses of nitrogen fertilizer from agricultural watersheds are among the main causes of water quality degradation in Quebec. Under maize crop, leached nitrate can reach up to 185 kg N ha−1. The synchronization of the nitrogen fertilization with crop uptake would be a way to optimize the use of nitrogen fertilizer and reduce nitrate leaching. Coupling an empirical nitrogen cycle model with a physical soil water dynamics model could simplify the optimization of nitrogen fertilizer use. The objective of this study was to couple the soil surface empirical nitrate production model adapted to the regional agro-climatic conditions of study area with HYDRUS to determine the most suitable combination in order to predict nitrate leaching into subsurface drains.

Keywords: Nitrogen management; Modeling; Organic fertilizer; Mineral fertilizer; Water pollution (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:213:y:2019:i:c:p:616-626

DOI: 10.1016/j.agwat.2018.10.013

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