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• W1940244685 abstract "espanolLos suelos de las urbanas y suburbanas suelen sufrir la perdida del horizonte superficial, con grave deterioro en sus propiedades hidraulicas y fisicas. Para remediar esta situacion es necesario el aporte de grandes cantidades de materia organica, usualmente residuos organicos. Aun no esta claro si la aplicacion de esos residuos en superficie es mas eficiente que su mezcla y enterramiento, para mejorar las propiedades de los suelos. Se estudio el efecto del agregado de diferentes mezclas basadas en biosolidos, sobre las llamadas areas de flujo preferencial (AFP) y otras propiedades fisicas e hidrologicas de la masa subsuperficial de un suelo disturbado. Se llevo a cabo un experimento en columnas, rellenadas con el horizonte Bt de un Argiudol tipico y tratamientos basados en el agregado superficial o semienterrado de mezclas de aserrin y biosolido, arena y biosolido y compost de biosolido. Se cuantificaron AFP, densidad aparente, contenido de humedad, tasa de infiltracion basica y se calcularon la porosidad total y el indice de expansion-contraccion. El horizonte Bt presento el menor porcentaje de AFP. Los tratamientos con agregado de compost y mezclas de biosolido con arena o aserrin presentaron mayor porcentaje de AFP. La densidad aparente disminuyo y la infiltracion aumento con el agregado de enmiendas organicas. No se observaron diferencias entre aplicar las enmiendas organicas en superficie o incorporadas y mezcladas en la capa superficial. EnglishThe soils of urban and suburban are very often subjected to the A horizon removal, which cause a strong hydraulical and physical properties degradation. To remediate this problem, the addition of large quantities of organic matter, usually organic residues, is needed. It is still not clear whether or not the surface application of those residues is more efficient than its mix within the topsoils, to improve soil properties. The effects of different mixes based on biosolids on the so called Preferential flow paths (PFP) and other hydraulical and physical properties of underlying soil was studied. An experiment was performed in columns, filled with the Bt horizon of a Typic Argiudoll. Biosolid mixed with sawdust or sand or composted were applied on surface or mixed within topsoil. PFP, bulk density, water content, and water infiltration rate were measured and total porosity and the Shrink-Swelling Index were calculated. The lower PFP percentage was found in the control (Bt horizon). Treatments receiving compost and biosolid mixes showed significant higher PFP percentage. Bulk density decreased and water infiltration increased after organic materials were applied. The hydraulical and physical properties of underlying soil improved both when organic materials were applied on surface or mixed within the control topsoils." @default.
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• W1940244685 date "2006-01-12" @default.
• W1940244685 modified "2023-09-27" @default.
• W1940244685 title "Efecto del aporte de enmiendas orgánicas sobre propiedades físicas e hidrológicas de un suelo urbano degradado" @default.
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