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ISHS Acta Horticulturae 573: International Symposium on Techniques to Control Salination for Horticultural Productivity

PREDICTION SALINE WATERTABLE CONTRIBUTION TO CROP EVAPOTRANSPIRATION

Authors:   F. Konukçu, M. Sener
Keywords:   Salinity, waterlogging, spinach, modelling, irrigation management
DOI:   10.17660/ActaHortic.2002.573.24
Abstract:
Disposal of drain water from irrigated areas in arid regions has become a significant problem. Methods are needed to minimise the volume of water requiring disposal. Shallow groundwater may represent a substantial resource by capillary rise in flat, low-lying areas, but may also represent a threat to sustainability where salinity is high.
Experiments in a laboratory conditions aimed to elucidate irrigation management practice under saline condition and to develop a root uptake model under both osmotic and matric stress.
The extraction of soil water and groundwater by spinach crop was measured in two lysimeters. The water table depths were 0.6 and 0.9 m below the soil surface and two salinity levels, 0.4 and 8 dS m-1, were used for each depth. The overall experiments showed that the ground water contribution was within the range of 26-72% of the total water use. There is a reasonable agreement between measured and estimated values.

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