WATER BALANCE IN GREENHOUSES UNDER POLIETHYLENE COVER: FIRST RESULTS FOR GALICIA (NW SPAIN).
This paper presents a first analysis of inputs and ouputs water relationships for greenhouses dedicated to cut-flower production, for a four year period (1988–1991). Results indicate that common irrigation doses does not attain the potential needs of plants. Deficit was observed in winter-spring, spring and/or spring-summer seasons, with different intensities, though it can be considered as high (> 100 mm per year in most cases). While water surplus seems not to be an important limitation for flower production.