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Nitrogen balances in Dutch organic greenhouse production

Cuijpers, Ir. W.J.M.; van der Burgt, Ir. G.J.H.M. and Voogt, Dr. W. (2008) Nitrogen balances in Dutch organic greenhouse production. In: Conference proceedings.

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Summary

The organic greenhouse production in the Netherlands is limited with regard to the number of growers, but plays an important role in EU organic greenhouse production. In the high-technology greenhouses a high production level is realized but nitrogen balances of this production system have been questioned. In order to document and improve the nitrogen balance, the production of seven greenhouses was monitored and soils were repeatedly analysed. The model “Bemestingsrichtlijn biologische kasteelten” (Fertilization Guide Organic Greenhouse Production) has been developed to simulate nitrogen availability and to fine-tune manure applications to crop demand. In the course of four years the overall nitrogen surpluses decreased sharply, but due to the observational character of the research no statistical analyses can be made. Part of the high surpluses in the first years can be explained by initial investments in soil organic matter. Calculation of the dynamic balance gives more possibilities to fine-tune farmers’ fertilization strategies. Growers that followed the model-based advise for manure application, realized a substantial reduction of nitrogen surpluses.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:greenhouse, modelling, nitrogen balance
Subjects: Soil > Nutrient turnover
Farming Systems > Farm nutrient management
Crop husbandry > Greenhouses and coverings
Research affiliation: Netherlands > Louis Bolk Institute
Deposited By: van der Burgt, Ir. G.J.H.M.
ID Code:15862
Deposited On:06 Jul 2009
Last Modified:12 Apr 2010 07:39
Document Language:English
Status:Published
Refereed:Not peer-reviewed

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