Tools and Strategies for Sustainable Nitrogen Fertilisation of Vegetable Crops
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Thompson, Rodney; Tremblay, Nicolás; Fink, Matthias; Gallardo Pino, Luisa; Padilla Ruiz, Francisco ManuelFecha
2017-05-18Resumen
In intensive vegetable production, N fertiliser applications often contribute
to a supply of N that appreciably exceeds crop N requirements resulting in
the loss of N to the environment which can result in NO3
contamination of water bodies. There is a range of tools and strategies that can assist vegetable growers to
improve N management. These include various methods based on soil analysis or
estimation of the soil N supply, N balance calculations, methods based on plant
analysis, methods based on monitoring crops with optical sensors, and the use of
computerised decision support systems based on simulation models or data bases.
Use of these tools has been demonstrated to appreciably reduce fertiliser N application
and N losses while maintaining production. The selection of tools to be used
by a grower will be influenced by factors such as availability, the grower’s technical
level, and economic considerations. For fertigation systems with high frequency N
application, a...
Palabra/s clave
fertiliser
nitrogen losses
nitrate leaching
soil testing
crop testing
sap analysis
optical sensors
simulation models
decision support systems
nitrification inhibitors
slow release fertilisers
controlled release fertilisers