EFFECT OF TWO GRAZING INTENSITIES ON THE HYDRAULIC PROPERTIES OF AN ANDISOL (DURIC HAPLUDAND)
To evaluate the grazing effect on soil hydraulic properties, structural properties of an Andisol under pasture with two grazing intensities were compared. The plots were sown in March 2006 with Lolium perenne cv. Arrow mixed with Trifolium repens cvs. Will and Huia. Before the first grazing, carried out in November 2006, the height of the pasture was homogenised by cutting once. The grazing frequency depended on the numbers of leaves of Lolium perenne cv. Arrow. The cows were removed from the plots when the height of the residue reached 5 or 8 cm (treatments). In March 2007 undisturbed soil samples were collected. The water retention curve, air permeability and saturated hydraulic conductivity were measured and the pore-size distribution, air-filled porosity, pore-continuity indexes and blocked porosities were calculated. The results did not show significant differences for any of the soil properties, mainly due to the excellent physical qualities of the Andisol and the season when the samples were collected (lower rainfall and water content in the soil, therefore, greater bearing capacity). Consequently, the Andisol, Serie Valdivia is able to sustain a high grazing intensity during the spring-summer season, without a deterioration of its structural properties and pore functions.
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Facultad de Ciencias Agrarias. Universidad Austral de Chile
2010
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rev-agrosur-cl-article-40362019-10-01T13:23:07Z EFFECT OF TWO GRAZING INTENSITIES ON THE HYDRAULIC PROPERTIES OF AN ANDISOL (DURIC HAPLUDAND) EFECTO DE DOS INTENSIDADES DE PASTOREO SOBRE LAS PROPIEDADES HIDRÁULICAS DE UN ANDISOL (DURIC HAPLUDAND) Alarcón V., Carlos Dörner F., José Dec B., Dorota Balocchi L., Oscar López C., Ignacio Intensidad de pastoreo propiedades hidráulicas Andisol Grazing intensities hydraulic properties Andisol To evaluate the grazing effect on soil hydraulic properties, structural properties of an Andisol under pasture with two grazing intensities were compared. The plots were sown in March 2006 with Lolium perenne cv. Arrow mixed with Trifolium repens cvs. Will and Huia. Before the first grazing, carried out in November 2006, the height of the pasture was homogenised by cutting once. The grazing frequency depended on the numbers of leaves of Lolium perenne cv. Arrow. The cows were removed from the plots when the height of the residue reached 5 or 8 cm (treatments). In March 2007 undisturbed soil samples were collected. The water retention curve, air permeability and saturated hydraulic conductivity were measured and the pore-size distribution, air-filled porosity, pore-continuity indexes and blocked porosities were calculated. The results did not show significant differences for any of the soil properties, mainly due to the excellent physical qualities of the Andisol and the season when the samples were collected (lower rainfall and water content in the soil, therefore, greater bearing capacity). Consequently, the Andisol, Serie Valdivia is able to sustain a high grazing intensity during the spring-summer season, without a deterioration of its structural properties and pore functions. Para evaluar el efecto del pastoreo directo sobre las propiedades hidráulicas del suelo, se compararon propiedades estructurales de un suelo bajo pradera con dos intensidades de pastoreo. Las parcelas fueron sembradas en Marzo del 2006 con Lolium perenne cv. Arrow en mezcla con Trifolium repens cvs. Will y Huia. Antes del primer pastoreo, realizado en noviembre de 2006, se realizó un corte de homogenización. La frecuencia de pastoreo se basó en el número de hojas de Lolium perenne cv. Arrow. Las vacas fueron retiradas del sector cuando la pradera alcanzó una altura de residuo de 5 y 8 cm (tratamientos). En marzo de 2007 se recolectaron muestras no disturbadas de suelo. Se determinó la curva de retención de agua, la permeabilidad de aire y la conductividad hidráulica en fase saturada y se calculó la distribución de poros por tamaño, la porosidad de aire, índice de continuidad de poros y el volumen de poros bloqueados. Los resultados no evidenciaron diferencias estadísticas significativas para ninguna de las propiedades del suelo analizadas, esto debido principalmente a las excelentes cualidades físicas que presenta el Andisol estudiado y a la temporada del muestreo (menores precipitaciones y contenido de agua en el suelo, por lo tanto, mayor capacidad de soporte). Consecuentemente, el Andisol, Serie Valdivia puede sustentar una alta intensidad de pastoreo en la temporada primavera-verano, sin que esto signifique un deterioro significativo de sus propiedades estructurales ni la función de sus poros. Facultad de Ciencias Agrarias. Universidad Austral de Chile 2010-04-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://revistas.uach.cl/index.php/agrosur/article/view/4036 10.4206/agrosur.2010.v38n1-04 Agro sur; Vol. 38 Núm. 1 (2010); 30-41 0719-4196 0304-8802 spa http://revistas.uach.cl/index.php/agrosur/article/view/4036/5020 http://revistas.uach.cl/index.php/agrosur/article/view/4036/5021 Derechos de autor 2010 Agro sur |
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Alarcón V., Carlos Dörner F., José Dec B., Dorota Balocchi L., Oscar López C., Ignacio |
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Alarcón V., Carlos Dörner F., José Dec B., Dorota Balocchi L., Oscar López C., Ignacio EFFECT OF TWO GRAZING INTENSITIES ON THE HYDRAULIC PROPERTIES OF AN ANDISOL (DURIC HAPLUDAND) |
| author_facet |
Alarcón V., Carlos Dörner F., José Dec B., Dorota Balocchi L., Oscar López C., Ignacio |
| author_sort |
Alarcón V., Carlos |
| title |
EFFECT OF TWO GRAZING INTENSITIES ON THE HYDRAULIC PROPERTIES OF AN ANDISOL (DURIC HAPLUDAND) |
| title_short |
EFFECT OF TWO GRAZING INTENSITIES ON THE HYDRAULIC PROPERTIES OF AN ANDISOL (DURIC HAPLUDAND) |
| title_full |
EFFECT OF TWO GRAZING INTENSITIES ON THE HYDRAULIC PROPERTIES OF AN ANDISOL (DURIC HAPLUDAND) |
| title_fullStr |
EFFECT OF TWO GRAZING INTENSITIES ON THE HYDRAULIC PROPERTIES OF AN ANDISOL (DURIC HAPLUDAND) |
| title_full_unstemmed |
EFFECT OF TWO GRAZING INTENSITIES ON THE HYDRAULIC PROPERTIES OF AN ANDISOL (DURIC HAPLUDAND) |
| title_sort |
effect of two grazing intensities on the hydraulic properties of an andisol (duric hapludand) |
| description |
To evaluate the grazing effect on soil hydraulic properties, structural properties of an Andisol under pasture with two grazing intensities were compared. The plots were sown in March 2006 with Lolium perenne cv. Arrow mixed with Trifolium repens cvs. Will and Huia. Before the first grazing, carried out in November 2006, the height of the pasture was homogenised by cutting once. The grazing frequency depended on the numbers of leaves of Lolium perenne cv. Arrow. The cows were removed from the plots when the height of the residue reached 5 or 8 cm (treatments). In March 2007 undisturbed soil samples were collected. The water retention curve, air permeability and saturated hydraulic conductivity were measured and the pore-size distribution, air-filled porosity, pore-continuity indexes and blocked porosities were calculated.
The results did not show significant differences for any of the soil properties, mainly due to the excellent physical qualities of the Andisol and the season when the samples were collected (lower rainfall and water content in the soil, therefore, greater bearing capacity). Consequently, the Andisol, Serie Valdivia is able to sustain a high grazing intensity during the spring-summer season, without a deterioration of its structural properties and pore functions.
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| publisher |
Facultad de Ciencias Agrarias. Universidad Austral de Chile |
| publishDate |
2010 |
| url |
http://revistas.uach.cl/index.php/agrosur/article/view/4036 |
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