Influencia de electrolitos, especies iónicas y sodio cambiable en la dispersión del suelo

the objetive of this work was to determine the dispersing effect of salinity in a gleysol petrogleyic soil of artemisa, pinar del río, cuba cropped with rice. the dispersing effect was determined from multiple lineal regresions obtained from the dispersion coefficient of the soils with the exchangeable sodiun percentage (psi), electric conductivity (ec) and ionic strengh that provide the total and free ions during the years 1997 to 2001, to discern the contribution of the salinity indicators % na+ (psi), total ionic strength (it), free ionic strength (il), electrical conductivity, and others un-considered factors to the dispersion of the soils. high average dispersion of these soils masked the effect of electrolite accumulation, counteracting it, with exchangeable sodium showing dispersing effect in electric conductivity ranges of 2,01 4 ds.m-1 and ana+.(aca2+)-0,5 total 5,01 7 (mmol.l-1)0,5.