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Development and test of an optimal model-based ion-specific nutrition control of horticultural crops

Description
Staff
Publications
Partners

2014 - 2017

Closed fertilization systems improve the water use efficiency of greenhouse crop production considerably thereby avoiding pollution of the ground water.

Cooperation Partners

NAME
Location
Country
Dosatronic GmbH
Ravensburg
Deutschland
Humboldt-Universität zu Berlin, Albrecht Daniel Thaer-Institut für Agrar- und Gartenbauwissenschaften
Berlin
Deutschland

Closed fertilization systems improve the water use efficiency of greenhouse crop production considerably thereby avoiding pollution of the ground water. However, the uptake ratio of water and the single nutrients is not constant over the cultivation period of most crops, which may result in ion imbalances in the nutrient solution, when the composition of supply solution is not adequately adapted to the growing conditions. To avoid this, an ion-specific nutrition control will be developed and tested. In this strategy, the optimal composition of the supply solution will be estimated based on models of the plant’s water and nutrient uptake depending on the stage of the phenological development and the environmental conditions. Ion-specific sensors measure on-line the composition of the drainage solution. These data are necessary when adding the drainage solution to the supply solution. They are also used as feedback in the supply composition control.

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