Journal of Horticultural Science · 1988 · 43 citations · 7 references
AgricultureAgronomyCrop SciencesCrop ProductionIrrigation ManagementSoil SalinityCrop Water RequirementsEvapotranspiration ChangesEvapotranspiration EstimationIrrigationIrrigation SystemsIrrigation Water RequirementsCrop Water Requirement AssessmentDaily Water RequirementEvaporative Salt AccumulationGreenhouse Cucumber ProductionGreenhouse IrrigationGreenhouse Irrigation ManagementIrrigation Requirement EstimationSalt Concentration Effects
SummaryThe potential évapotranspiration (ETP) of heated greenhouse-grown cucumber was measured over two experimental seasons (1982–3 and 1983–4) using plants grown in drainage lysimeters. The crop ETP at planting in November was 0.2 of evaporation from a United States Weather Bureau Class A screened pan (Epan) located outside the greenhouse, and increased gradually to 1.1 × Epan at the conclusion of the experiment in May. Over the whole growing period the average water requirement was equivalent to 0.7 × Epan. The crop ETP ranged between 0.6 and 5.7 mm d−1 with a whole-season irrigation requirement corresponding to 5040 m3 ha−1. Water applications at 0.6 × ETP reduced yield significantly. The highest yield was obtained with the 1.0 × ETP treatment. Soil salt concentration below the dripper increased as the amount of water applied decreased, while mid-way between irrigation lines, salt concentration increased as the amount of water supplied increased. The highest salt accumulation occurred in the surface 0–10 cm layer of the soil.
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