Les besoins en eau de la tomate sous serre à film polyéthylène en Tunisie

Abstract

Water consumption of a tomato crop under polyethylene greenhouse in Tunisia. Comparison of the water consumption of tomato hybrids with determinate and indeterminate growth and cultivated in lysimeters permitted to conclude that varieties with determinate growth have a smaller water consumption than the indeterminate ones. Comparison ofthe water consumption of a tomato crop cultivated on a lysimeter with the water consumption of a tomato crop cultivated in a lateral isolated greenhouse, preventing lateral infiltration and with water stock control by neutron probe indicates a surestimation of the water consumption by the lysimeter method with about 15 %. Daily measuring of the water consumption of a Kikuya-grass cultivated on a lysimeter under PE greenhouse permitted to obtain the potential evapotranspiration in function of the global radiation under greenhouse, while comparison of the water consumption of the Kikuya-grass with the tomato crop allowed us to obtain the cultural parameters of this evapotranspiration in function of the stage of growth of a tomato crop