WATER CONSUMPTIVE USE OF GREENHOUSE TOMATOES AS RELATED TO VARIOUS LEVELS OF SOIL WATER POTENTIAL UNDER DRIP IRRIGATION.

N.G. Michelakis, K.S. Chartzoulakis
To determine the optimal water consumption in greenhouse tomatoes under drip irrigation, the amount of applied water and the frequency of irrigation were controlled by tensiometers and gypsum blocks, to maintain the soil water potential higher than the following four different levels: 5/2, 0.6/0.6, 0.6/0.2 and 0.2/0.1 (-bars), where the first number at each level corresponds to the period up to first fruit set and indicates a more dry level than the second one which corresponds to the rest of the period.

The total quantity of the applied irrigation water during the period September-June was: 310, 340, 390 and 610 mm for the above mentioned levels respectively.

The total yields which were 13.500, 14.650, 15.000 and 14.600 Kg/1000 m2 in the above mentioned soil water pontential levels respectively were not significantly different among them.

The average fruit weight being in the range of 146 to 154 g did not show significant differences among treatments.

Examinations of the root distribution in soil profiles between two successive plants up to a depth of 60 cm did not show important differences among the treatments.

So far the best result was achieved by 0.6/0.2 level.

Michelakis, N.G. and Chartzoulakis, K.S. (1988). WATER CONSUMPTIVE USE OF GREENHOUSE TOMATOES AS RELATED TO VARIOUS LEVELS OF SOIL WATER POTENTIAL UNDER DRIP IRRIGATION.. Acta Hortic. 228, 127-136
DOI: 10.17660/ActaHortic.1988.228.13
https://doi.org/10.17660/ActaHortic.1988.228.13

Acta Horticulturae