Resumen

OTERO-GOMEZ, Lázara María et al. Influence    of    electrolites,    ionic    species and exchangeable  sodium  on  soil  dispersion. Agron. Mesoam [online]. 2012, vol.23, n.1, pp.189-200. ISSN 2215-3608.

 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.

Palabras clave : Salinity; electric  conductivity; ionic strength.

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