ISHS Acta Horticulturae 554: World Congress on Soilless Culture: Agriculture in the Coming Millennium
RECYCLING OF NUTRIENT SOLUTIONS FOR ROSE (Rosa hybrida) IN SOILLESS CULTURE |
| Authors: | R. Brun, A. Settembrino, C. Couve |
| Keywords: | Rosa hybrida, recycling, leachate solution, electrical conductivity, nutrients. |
| Abstract:
Recycling systems based on electrical conductivity (EC) control were tested and compared to systems without recycling. Fertigation effluents were recovered in storage tanks. A water complement was added to the drainage to decrease the EC. The irrigation nutrient solution was obtained by adding a complement nutrient solution to obtain the desired EC. Losses by drainage and savings by recycling were measured. Losses were about 44% for leachate solution and 56% for nutrients. Savings by recycling were about 42% for leachate solution and 55% for nutrients. Flower yield, quality and vase life were not affected by recycling. Management of recycling using EC measurement proved to be reliable. There are good relationships between EC and ions concentrations for supplied solutions and leachate solutions recycled and not recycled. | |
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