El sub-aprovechamiento del suelo del sistema de andenería de la comunidad campesina San Pedro de Laraos, Huarochirí, Lima
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2015-12-01
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Pontificia Universidad Católica del Perú. Fondo Editorial
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Los sistemas de andenería son una tecnología prehispánica utilizada en los Andes para ampliar la frontera agrícola, llegándose a convertir en una importante fuente de alimentos para los Incas. Investigaciones señalan que la productividad de las tierras fue resultado de la forma de construcción de los andenes, pero son pocos los estudios que analizan la condición fértil del suelo propiamente. Para demostrar la fertilidad del suelo de los andenes, se compararon las propiedades físicas y químicas del suelo en tres zonas: andenes en descanso, andenes abandonados y ladera sin andenes, todos pertenecientes al sistema de andenería de la localidad de San Pedro de Laraos, provincia de Huarochirí, Lima. En los tres sectores predomina la textura franca. El pH se encuentra dentro del rango de mayor disponibilidad de nutrientes (5,5 – 7,5), con excepción de dos puntos en la ladera sin andenes. La conductividad eléctrica presenta rangos que califican al suelo de las tres zonas como “no salinos” (0,174 – 0,683 dS/m). La materia orgánica está en los porcentajes adecuados (3 – 5 %), sobre todo en los andenes en descanso, que de igual manera tenían los contenidos más elevados de NPK. Se concluye que el suelo de las tres zonas no difiere significativamente en sus parámetros físicos, pero sí en los parámetros químicos, especialmente en los contenidos de macronutrientes, siendo los andenes en descanso los que presentan valores dentro de los rangos ideales. Sin embargo, la comunidad larahuina no aprovecha la fertilidad de sus suelos, dejando sus andenes abandonados y en proceso de deterioro.
Highland terracing systems are a technology used in the ancient Andes to expand the agricultural frontier; then, that technology became an important source of food for the Incas. Research shows that the productivity of land was due to the form of construction of the platforms, but there are few studies that analyze soil fertility. In order to demonstrate the fertility in the terraces, soil physical and chemical properties were compared in three different sectors: terraces at rest, abandoned terraces and a hillside with no technology. They all belong to the terracing system of San Pedro de Laraos town, in Huarochiri, Lima. In all three sectors loam predominates. The soil pH is within the range of high bioavailability of most nutrients (5.5 to 7.5), except for two points on the slope without platforms. The soil electrical conductivity presents ranges that qualify the three areas as "no saline" (< 2 dS / m). The organic matter is in the appropriate percentages (3-5%), especially on the terraces at rest, which also have the highest content of NPK. In conclusion, the soil of the three zones does not differ significantly in their physical parameters, but it differs in the chemical parameters, especially in the content of macronutrients; the better range is in terraces at rest. However, the community of Laraos does not take advantage of it soil fertility; actually, most of their terracing system is abandoned and the structures are in a deterioration process.
Highland terracing systems are a technology used in the ancient Andes to expand the agricultural frontier; then, that technology became an important source of food for the Incas. Research shows that the productivity of land was due to the form of construction of the platforms, but there are few studies that analyze soil fertility. In order to demonstrate the fertility in the terraces, soil physical and chemical properties were compared in three different sectors: terraces at rest, abandoned terraces and a hillside with no technology. They all belong to the terracing system of San Pedro de Laraos town, in Huarochiri, Lima. In all three sectors loam predominates. The soil pH is within the range of high bioavailability of most nutrients (5.5 to 7.5), except for two points on the slope without platforms. The soil electrical conductivity presents ranges that qualify the three areas as "no saline" (< 2 dS / m). The organic matter is in the appropriate percentages (3-5%), especially on the terraces at rest, which also have the highest content of NPK. In conclusion, the soil of the three zones does not differ significantly in their physical parameters, but it differs in the chemical parameters, especially in the content of macronutrients; the better range is in terraces at rest. However, the community of Laraos does not take advantage of it soil fertility; actually, most of their terracing system is abandoned and the structures are in a deterioration process.
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