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Título

Water quality and irrigation system affects salt accumulation and distribution in the soil profile of citrus orchards. A case study in Almenara (Valencia, Spain)

Autor Molina, M. J. ; Visconti Reluy, Fernando ; Paz Bécares, José Miguel de; Llinares, J. V.; Tellols, Lourdes ; Ingelmo Sánchez, Florencio ; Sánchez, J.
Fecha de publicación 25-oct-2010
EditorFood and Agriculture Organisation of the United Nations
Citación Global Forum on Salinization and Climate Change (2010)
ResumenThe citrus crops cultivated in the Mediterranean area of Almenara (Spain) are threatened by soil salinization. Three citrus orchards representative in the area were monthly sampled at 10, 30, and 60 cm depth during the irrigation period, and analysed for soil salinity parameters in the saturation extract: electrical conductivity, pH, alkalinity and major ions. One of the plots was drip-fertirrigated with water of low salinity and the two other were surface-irrigated with more salty water. Samples grouped by plot and depth were statistically treated by Discriminant Analysis (DA) in order to disentangle the soil salinity parameters discriminating among the groups. A function explaining 51% of variance separated the plots by the quality of irrigation water, with chloride and sodium in the soil saturation extract as the main variables separating plots. Another function explaining 33% of variance separated shallow from deep soil layers, with nitrites and potassium as the main variables discriminating among depths. Samples at 30 and 60 cm depth in the surface-irrigated plots had similar salt composition. In the drip-fertirrigated plot, nutrients decreased beyond 30 cm depth. This suggests an efficient use of water and nutrients by plants that decrease salt accumulation in the profile, compared to the accumulation of salts in the root zone and beyond it in the surface-irrigated plots. Drip irrigation systems should be used in a new scenario of climate change, given the future lack of good quality water resources and the increase of water demand by the crops due to higher temperatures.
Descripción Poster presentado en el Global Forum on Salinization and Climate Change celebrado en Valencia del 25 al 29 de octubre de 2010
URI http://hdl.handle.net/10261/95066
Aparece en las colecciones: (CIDE) Comunicaciones congresos
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