Parametros edáficos relacionados con la erosión eólica en inceptisoles del Chaco

Authors
Rojas, J. M.; Buschiazzo, Daniel Eduardo; Arce, Osvaldo Ernesto Antonio
Publication Year
2013
Language
Spanish
Format
article
Status
Published version
Description
Wind erosion is one of most common degradation processes in agricultural soils of Chaco. Little information exists on the effects of wind erosion on agricultural soils of this region. The objectives of this study were to: 1) analyze the behavior of the erodible fraction (FE) and the dry aggregate stability (EES) as indexes of the susceptibility of soils to wind erosion, 2) relateFE to other soil parameters in order to develop equations useful to predict soil wind erosion susceptibility and 3) test if such equations are compatible with those used in the EWEQ model, developed for the Semiarid Pampas. The study was carried out in an area of the Chaco Ecorregion, where forests and grasslands are being replaced by annual cropping practices. The soils studied were classified as Udic Haplustepts, and were under pristine and agriculture conditions. Agricultural soils showed lower EF values, which indicate a lower susceptibility of the soils to be eroded by wind than pristine soils. This unexpected result was probably due to the formation of clods, as a result of tillage operations performed under certain conditions of soil moisture. No relationships were found between FE or EES and the years since the forest clearing. Relationships between FE and texture were not enough to fit a predictive model. The experimental data did not show an association with the FE data calculated with the EWEQ model. EES showed higher values in agricultural conditions than under pristine conditions. Future research must be developed in order to establish a prediction equation for FE for soils of the region. Such equation may allow for a better decision framework for sustainable soil management practices.
Fil: Rojas, J. M.. Instituto Nacional de Tecnología Agropecuaria; Argentina
Fil: Buschiazzo, Daniel Eduardo. Instituto Nacional de Tecnología Agropecuaria. Centro Regional La Pampa-San Luis. Estación Experimental Agropecuaria Anguil; Argentina. Universidad Nacional de la Pampa; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Ciencias de la Tierra y Ambientales de la Pampa; Argentina
Fil: Arce, Osvaldo Ernesto Antonio. Universidad Nacional de Tucumán. Facultad de Agronomía y Zootecnia; Argentina
Subject
fracción erosionable
estabilidad estructural en seco
Chaco semiárido
Ciencias del Suelo
Agricultura, Silvicultura y Pesca
CIENCIAS AGRÍCOLAS
Access level
Open access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/12365