Using LEACHM model for evaluation and optimization of the use low quality water in citrus

Abstract

To evaluate the risk of salinization in soils with citrus crop we use the model LEACHM calibrated and validated in 7 profiles of the Torreblanca's sedimentary basin (Castellón, Spain). An analysis of scenes was applied by means of the combination of: crop, climate, soils, type of irrigation and waters quality and analyzed alternative strategies by means of the utilization of water mixtures.

The statistical index indicates a better adjustment of the model in the rootzone between the 200-600 mm and a light up-estimation of the moisture content in the lower layers. As for the risk of salinization the results confirm the inappropriate use of the waters with CE > 3 dS/m. The water use with 2-3 dS/m is recommended only in the drip irrigation and there proposes an alternative that diminishes the risk of salinization by means of the application of different types of water depending on the season.