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Articles

ESTIMATING TRANSPIRATION RATE AND CANOPY RESISTANCE OF A ROSE CROP IN A FAN-VENTILATED GREENHOUSE

Article number
548_34
Pages
303 – 310
Language
English
Abstract
The influence of solar radiation (G) and saturation deficit (VPDair) of the greenhouse air on transpiration rate, canopy resistance was investigated on a soilless rose crop (cv.
First Red), grown on perlite, during the 1998 summer growing period.
Measurements of TR, G, Tair, VPDair, Tleaf were carried out in a fan-ventilated glasshouse located in the region of Magnesia on the coastal area of Eastern Greece.
Transpiration rate was found to be dependent on solar radiation and VPDair during daytime.
A clear diurnal hysteresis of TR vs.
VPDair, was evidenced.
The above measurements were used for (i) the calibration of a model based on a simplified form of the Penman-Monteith equation: TR= alpha f1(LAI)G + beta f2(LAI)VPDair, and (ii) the determination of a relationship between canopy resistance rc and climate variables.
Application of both models gave satisfactory results.

Publication
Authors
N. Katsoulas, C. Kittas, A. Baille
Keywords
rose crop, glasshouse, transpiration, canopy resistance, soilless culture
Full text
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