Abstract

SANCHEZ-BERNAL, Edgar Iván et al. Evaluation of osmotic potentials in soils and coastal waters of Oaxaca, México, using prediction equations. Acta univ [online]. 2019, vol.29, e2125.  Epub Jan 10, 2020. ISSN 2007-9621.  https://doi.org/10.15174/au.2019.2125.

The objective of this study was to evaluate the osmotic coefficients of fifteen samples of soils and fifteen irrigation waters of the coast of Oaxaca, in which the parameters electrical conductivity (EC), total dissolved solids (STD) and osmotic potential (ψπ) interact with the model Ψπ = K3 x TDS, obtained from the literature and required to simulate osmotic or toxic salt trends in the water-soil-plant relationship. Its application can aid in the prevention of damage of crops by salinity. In laboratory, physical-chemical analysis of soils and waters were performed; in cabinet, predictive equations were done. The Ψπ obtained are close to those of the theoretical coefficient -0.036 x CE (dS m-1) of the Salinity Laboratory of the United States of America. Both methods present a high correlation (r = 0.99). The Ѱπ evaluated are produced by a hydrochloric salinity with an intense osmotic effect. The equations of the proposed model predict well the saline osmotic phenomenon.

Keywords : Osmotic coefficient; electrical conductivity; total dissolved solids; predictive equations; hydrochloride salinity.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )