Articles
NUTRIENT MANAGEMENT IN ORGANIC GREENHOUSE PRODUCTION: NAVIGATION BETWEEN CONSTRAINTS
Article number
915_9
Pages
75 – 82
Language
English
Abstract
Organic greenhouse production within the European context is limited both by its own principles, among them restrictions concerning soil and fertilizers, and by legislative restrictions on manure, compost and fertilizer applications.
Results of a monitoring project on organic greenhouses were evaluated concerning the various legal constraints.
Important bottle necks are related to the limitations in the N and P input, the unbalanced input of nutrients and the restrictions on irrigation with consequently increased salinity problems.
The development of an organic fertilizer database and a decision support model for fertilizer and organic matter application is evaluated.
Balanced mineral supply is possible within the prevailing legal mineral targets, but risk of salinity is a concrete concern.
Challenges in the very near future will be the upcoming targets on N and P emission and new regulations on organic manure.
Results of a monitoring project on organic greenhouses were evaluated concerning the various legal constraints.
Important bottle necks are related to the limitations in the N and P input, the unbalanced input of nutrients and the restrictions on irrigation with consequently increased salinity problems.
The development of an organic fertilizer database and a decision support model for fertilizer and organic matter application is evaluated.
Balanced mineral supply is possible within the prevailing legal mineral targets, but risk of salinity is a concrete concern.
Challenges in the very near future will be the upcoming targets on N and P emission and new regulations on organic manure.
Authors
W. Voogt, P.H.E. de Visser, A. van Winkel, W.J.M. Cuijpers, G.J.H.M. van de Burgt
Keywords
organic standards, legislation, nitrogen, phosphate
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