ISHS Acta Horticulturae 424: II International Rose Symposium
NYCHTHEMERAL UPTAKE OF WATER AND NITRATE (NO3-) DURING THE GROWTH OF ROSE PLANTS IN HYDROPONIC CULTURE |
| Authors: | R. Brun, L. Chazelle, Y. Tarere, S. Voisin |
| Abstract:
An experimental hydroponic system (N.F.T.) was used to measure the water and nitrate uptake rates of rose plants on a short term basis (hourly fluctuations over a nycthemera). Nitrate and water uptake are subject to large diurnal variations. 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 climatic factors, we are able to elaborate a model in order to simulate the nitrate needs of the plant. | |
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