ISHS Acta Horticulturae 417: International Symposium on Greenhouse Crop Models
MODELING THE UPTAKE OF WATER AND NITRATE (NO3) OF ROSE PLANTS IN HYDROPONIC CULTURE. |
| Authors: | R. Brun, A. Morisot |
| Keywords: | greenhouse, fertigation, soilless culture |
| Abstract:
An experimental hydroponic system (nutrient film technique N.F.T. system) is used to measure water and nitrate uptake rates of Rosa hybrida on a short term basis: hourly fluctuations over a nycthemera. As it is well known for more species, water absorption closely follows the climatic demand with a large peak during the day whereas nitrate absorption seems to start slightly before. Relating absorption to agroclimatic factors, we can elaborate a model in order to evaluate the instantaneous nitrate needs of the plant. This approach is a first step in the development of real time algorithms for fertigation computers. | |
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