Abstract

MUGUIRO, A; ALVAREZ, C; BABINEC, F  and  MARANO, R. Rehabilitacion de suelos hortícolas: impacto de prácticas agrícolas con uso de yeso y drenaje. FAVE. Secc. Cienc. agrar. [online]. 2017, vol.16, n.2, pp.69-90. ISSN 1666-7719.

The excess of Na+, carbonates and bicarbonates present in irrigation water increases the pH, the electric conductivity (EC) and the exchangeable sodium percentage (ESP) in the soil, thus affecting crop growth. The aim of this work was to quantify the use of different techniques in petro-calcium soils of La Pampa affected by irrigation with sodium bicarbonate underground waters. Lettuce was grown during four cycles (500 days) in two greenhouses differentiated by years of irrigation, using a completely randomized factorial design with 4 sub-samples (units of measurement). Treatments in both tunnels (2=B1 and 4=B2 years) were: 1) T0, non-treated control; 2) T1, 3.5 Mg ha^-1 of agricultural gypsum, 3) T2, 3.5 Mg ha^-1 of agricultural gypsum + drainage, and 4) T3, drainage. Gypsum significantly decreased the concentration of Na+ and ESP from the surface to 0.4 m. It also significantly improved the physical conditions of the soil in tunnel B2, which was manifested through an increase of the accumulated productivity of the lettuce crop. However, no significant differences were registered in soil pH in any of the evaluated depths. Additionally, the soil EC under the different treatments decreased notably from the 2nd production cycle onwards, due to the increase in the irrigation depth.

Keywords : Drip irrigation; Lettuce; Amendment; Drainage.

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