Abstract

VANIER, Mariangeles; DEL FUEYO, Patricia; TARDITTI, Andrés  and  HEREDIA, Olga Susana. GERMINATION BEHAVIOR OF PHYTOREMEDIATE SPECIES OF SALINE EDAPHIC ENVIRONMENTS. Cienc. suelo [online]. 2022, vol.40, n.1, pp.92-101.  Epub Apr 20, 2023. ISSN 1850-2067.

The increase in the salinization processes of the soils is an important problem because it conditions agriculture. In Argentina, a susceptible zone is found in the SE of the province of Córdoba. In the Humid Pampa, the main source of salts is the groundwater. In the field under study, marginal areas with the presence of salts on the surface are located. The objective of this work is to evaluate the degree of salinization of the environment and identify viable species for future phytoremediation, through the study of the germinative behavior of species tolerant to certain ranges of salinity. Soil and groundwater samples were taken in three sub-environments of saline lowland soils. Electrical conductivity (EC) in saturation paste and pH1: 2.5 in soil, pH and EC of groundwater were analyzed. Germination tests were carried out with groundwater, using several species: Festuca arundinacea, Thynopyrum ponticum, Lolium multiflorum, Hordeum vulgare and Chenopodium quinoa. The soils presented slightly alkaline pH and EC>2 dS m-1, reaching extreme values of 20,9 dS m-1on the surface; groundwater used was at at 60 cm depth with EC = 16,8 dS m-1. The germination capacity was greater than 80% for L. multiflorum, F. arundinacea and Ch. Quinoa; equal to 67% and 50% for H. vulgare and Th. ponticum respectively. Germination delay was observed according to a gradient of salt concentrations. For the recovery of the environment investigated a mixture of L. multiflorum, F. arundinacea, and Th. ponticum could be used. In high salinity environments Ch. quinoa shows promising as a food-producing species.

Keywords : electrical conductivity; soil recovery; groundwater..

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