ISHS Acta Horticulturae 278: Symposium on Scheduling of Irrigation for Vegetable Crops under Field Condition
MONITORING PLANT WATER STATUS |
| Author: | T. McBurney |
| Abstract:
Two methods were developed for monitoring plant water status based on the use of electronic sensors. In the first method a novel psychrometer was devised which incorporated temperature control so as to reduce temperature gradients and enable monitoring of plant water potential in the field. Measurements with the psychrometer were validated against the destructive pressure chamber technique. The second method was based on the use of a displacement transducer to measure water potentials indirectly from measurements of shrinkages in plant tissues. Shrinkage of leaves or stems was a sensitive indicator of plant water status but necessitated calibrations. Possible applications of the techniques are briefly discussed. | |
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