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In 2008, the degree of compaction of the best land Classes I and II agrologic cultivated with sugarcane among the municipalities of Palmira, El Cerrito and Candelaria in Valle del Cauca, Colombia was measured.  First, an index mapping compaction IC based on the bulk density from 0 to 15 cm deep in 144 sampling points was performed.  The mapping of these classes was obtained from the detailed study of soils in this area with the help of ArcGIS® software.  Se-cond, we assessed the influence of compaction rates prevailing on some hydrodynamic properties and soil moisture regime R.H.S, for that, two measurement points were located in each of the three soils for 75 days.  Third, we found the effectiveness of R.H.S prediction by the simulation model SOMORE.  The study showed that the soils do not have high levels of compaction, and also exhibited high organic matter content 4% to 6%.  It was found that the hydrological characteristics and moisture retention are at adequate workability, additionally, the R.H.S is negatively affected by rainfall, but did not differ between treatments.  The SOMORE model was acceptable and practical to estimate the R.H.S., Muestras de los primeros 20 cm de la superficie de dos suelos Calciustol y Haplustol, los dos vérticos mezclados francosos isohipertérmicos con pendiente 0.5%, en diferentes cultivos en el CIAT-Palmira, fueron compactados en el aparato de Richards en dos condiciones de humedad 0.1 bar y 0.5 bar para medir el punto de máxima compactación, estimado a través de la variación de la densidad aparente, la tasa de difusión de oxígeno, la porosidad de aireación, la conductividad hidráulica saturada y el módulo de ruptura. Se incluyeron dos testigos bajo cobertura de bosque natural en los mismos suelos y se utilizó un diseño completamente al azar con arreglo factorial 2 suelos x 2 usos x 2 humedades con tres repeticiones. Para la comparación de medias se utilizó la prueba de Duncan P andlt; 0.05. Los suelos cultivados fueron potencialmente más susceptibles a la compactación que los de bosque, a pesar de que los primeros presentaban un contenido promedio de 4% de M.O. En condiciones de alta humedad 0.1 bar los suelos cultivados presentaron igualmente mayor potencial de compactación. Calciustol resultó con mayor potencial a la compactación, independientemente del uso. El estudio sugiere que los altos contenidos de M.O no siempre evitan la degradación por trãfico de maquinaria en condiciones de alto contenido de humedad.

Tipo de documento: Artículo - Article

Palabras clave: Compactación potencial, compactador de Richards, manejo del suelo, Soil compaction index, soil consistency, soil moisture regime, SOMORE





Fuente: http://www.bdigital.unal.edu.co


Introducción



Research article Compaction on sugarcane cultivated soils in the south area of Valle del Cauca, Colombia Compactación de suelos cultivados con caña de azúcar en la zona sur del Valle del Cauca, Colombia Edgar Madero-Morales1*, Jorge Armando Ramírez-Alzate2†, Álvaro Albán2‡, Betsy Yadira Escobar3**, Luís Fernando García3††, and María Elvira Peña-Artunduaga3‡‡ Associate Professor.
Department of Engineering, Faculty of Engineering, Universidad Nacional de Colombia - Palmira. Universidad Nacional de Colombia -Palmira. 3Universidad del Valle, Cali, Colombia. *Corresponding author: eemaderom@unal.edu.co; †jara85@gmail.com; ‡alvaroalban75@gmail.com; **betsyyadira@gmail.com; ††luisfega2@hotmail.com; ‡‡maripena@univalle.edu.co 1 2 Rec.: 08.04.11 Acept.: 26.11.11 Abstract In 2008, the degree of compaction of the best land (Classes I and II agrologic) cultivated with sugarcane among the municipalities of Palmira, El Cerrito and Candelaria in Valle del Cauca, Colombia was measured.
First, an index mapping compaction (IC) based on the bulk density from 0 to 15 cm deep in 144 sampling points was performed.
The mapping of these classes was obtained from the detailed study of soils in this area with the help of ArcGIS® software.
Se–cond, we assessed the influence of compaction rates prevailing on some hydrodynamic properties and soil moisture regime (R.H.S), for that, two measurement points were located in each of the three soils for 75 days.
Third, we found the effectiveness of R.H.S prediction by the simulation model SOMORE.
The study showed that the soils do not have high levels of compaction, and also exhibited high organic matter content (4% to 6%).
It was found that the hydrological characteristics and moisture retention are at adequate workability, additionally, the R.H.S is negatively affected by rainfall, but did not differ between treatments.
The SOMORE model was acceptable and practical to estimate the R.H.S. Key words: Soil compa...






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