WATER REQUIREMENTS OF EGGPLANT GROWN UNDER A GREENHOUSE

A set of 16 drainage lysimeters were installed under a greenhouse; a couple, where meadow fescue (Festucapratensis L.) was grown, was used to measure the ETp; seven replicated irrigation regimens on eggplant "Sicilia" hybrid, were obtained in the other lysimeters, irrigating when evaporation from a "class A Pan" in the greenhouse reached respectively the values of 10, 20, 30 ….. 70 mm.

Linear relations were found between yield and seasonal evapotranspiration.
Maximum evapotranspiration (about 800 mm) was obtained when the plants were irrigated at 10 mm of "A" Pan evaporation.

Crop coefficients with respect to ETp and to evaporimeters are reported; they appear higher than the correspondent values found in the literature for field conditions.
The relationship between relative yield decrease (1-Ya/Ym) and relative evapotranspiration (1-ETa/ETm) at different stages of growth confirms the marked sensitivity of the crop.

Symposium on Protected Cultivation of Solanacea in Mild Winter Climates

F. Quaglietta Chiarandà, G. Zerbi

https://doi.org/10.17660/ActaHortic.1986.191.15