Seasonal variation of soil aggregate stability, porosity and infiltration during a crop sequence under no tillage
Soil properties vary over time with soils presenting different susceptibility to runoff and erosion during the year. Under no-tillage cropping, soil physical properties could change mainly due to the climatic factor effect, crop type and wheel traff ic. The aim of this study was to analyze the...
| Autores principales: | , , , |
|---|---|
| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
Sociedad Mexicana de la Ciencia del Suelo
2019
|
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/5917 https://www.terralatinoamericana.org.mx/index.php/terra/article/view/333 https://doi.org/10.28940/terra.v36i3.333 |
| Sumario: | Soil properties vary over time with soils presenting
different susceptibility to runoff and erosion during the
year. Under no-tillage cropping, soil physical properties
could change mainly due to the climatic factor effect,
crop type and wheel traff ic. The aim of this study was to
analyze the seasonal variation of selected soil physical
properties of an Aquic Argiudoll under no-tillage,
focusing on their relationship with water partitioning
between inf iltration and runoff during a typical crop
sequence of the Pampean region (Argentina). The
study was carried out in an agricultural f ield located
at the Paraná Experimental Station of the Instituto
Nacional de Tecnología Agropecuaria (INTA) in Entre
Ríos province (Argentina). Soil samples were taken
at six different times during the crop rotation cycle.
Soil water content, bulk density, pore size distribution,
structural stability and water inf iltration obtained with
a rainfall simulator were determined on each sampling
date. To relate the behavior of these soil properties
with the previous weather conditions, we considered
different climatic variables. Our results showed that
there was no influence on soil physical properties of
the crop type or the wetting and drying soil cycles.
However, in this high silt content Argiudoll with a
moderate to high contraction and expansion capacity,
it was found that soil macroporosity was higher in drier
soils, reducing the runoff coeff icient. Furthermore, soil
structural stability also affected the inf iltration capacity
of this soil during some periods, resulting in a better
structure during periods of higher temperature. We
conclude that the critical period for this Argiudoll to
generate runoff would be mid-autumn to early spring,
when the soil water content is higher, temperatures
are low, and therefore macroporosity, soil structural
stability and inf iltration rates have worse values. In this
sense, winter cover crops is a management practice that
will favor the soil drying and coverage, reducing runoff
risk during this period. |
|---|