Edafología. nº 5. Diciembre 1998. pag 11-28.

EFECTO DE DOSIS DE ÁCIDO POLIMALEICO EN LA ESTABILIDAD ESTRUCTURAL DE SUELOS SALINOS

P.R.C. Lopes (1), J.M. Gisbert (2), L.D. Gómez (2) y C.A.V. Oliveira (1)

(1) EMBRAPA / Centro de Pesquisa Agropecuaria do Trópico Semiárido (CPATSA) 56.300-000, Petrolina (PE), Brasil.

(2) Departamento de Producción Vegetal, Unidad Docente de Suelos. Universidad Politécnica de Valencia, 46.010, Valencia.

Abstract

It was studied the effect of polimaleic acid on the structural stability of three types of saline soils. Four different doses (0, 5, 10 and 15 L/ha) of polimaleic acid were applied on natural aggregates (4<ø>2 mm)of the three saline soils and the mean weighted diameter (MWD) the percentage of the water dispersed clay (WDCP) were determined during five succesive period of 30 days. For the three treated soils the higher doses produced the greater increase in MWD and the greater reduction in the WDCP.

Key Words: Salinity, aggregate stability, polymer.

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