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• W2289351710 abstract "Los macroinvertebrados del suelo intervienen en los procesos de infiltracion, aireacion e incorporacion de materia organica en el suelo, y las condiciones biologicas del suelo se ven alteradas cuando existe un uso continuo de agroquimicos o el suelo es arado. En el presente estudio se investigo si la abundancia y la presencia de diferentes ordenes taxonomicas de macroinvertebrados pueden indicar el grado de fertilidad de un sistema. El estudio se llevo a cabo en 24 sitios, 17 manejados (policultivos arboreos, frutales, canaveral y pastos inducidos) y 7 naturales (selva, pastizal y vegetacion riveriana), en los cuales se muestreo a los macroinvertebrados del suelo de acuerdo con el metodo internacional TSBF (monolitos de 25 x 25 x 30 cm). En cada sitio se realizaron entre 10 y 50 monolitos. Se encontro el mayor numero de ordenes: 9, con el mayor indice de diversidad de Shannon (H = 2) en los ecosistemas como la selva, la vegetacion riveriana, y la tierra de descanso con leguminosas, sitios con un contenido alto en materia organica (3-15%), fosforo disponible Olsen (13-24 mg kg -1 ) y nitrogeno total (0.14-0.43%), con valores de pH cercanos a 7. El numero de ordenes disminuyo de acuerdo con el tipo de uso del suelo; en los policultivos arboreos fue de 8 a 6, siendo de 1 a 5 en los monocultivos no arboreos como el maiz o el pastizal inducido, sitios que presentaron los menores contenidos de materia organica (1.6-3.5%), fosforo Olsen (2-14 mg kg -1 ) y nitrogeno total (0.2%), con valores de pH cercanos a 5. Palabras clave: agroecosistemas, ecosistemas naturales. SUMMARY Soil macroinvertebrates intervene in the processes of infiltration, aeration and incorporation of soil organic matter. Soil biological conditions are affected by continuous use of agrochemicals or tillage. In this study we determined whether the abundance and presence of different orders of macroinvertebrates can indicate the degree of fertility of a system. The study was carried out in 24 sites, 17 managed (tree polyculture, fruit trees, sugarcane, and induced pasture) and 7 natural (rain forest, pasture, and riparian vegetation) systems. We sampled soil macroinvertebrates using the TSBF international method (25 x 25 x 30 cm monoliths). Ten to 50 monoliths were made per site. The highest number (9) of taxon orders was found with the highest Shannon diversity index (H = 2) in tropical rain forest, riparian vegetation and fallow land with legumes, sites with the highest organic matter content (3-15%), available Olsen phosphorus (1324 mg kg -1 ) and total nitrogen (0.14-0.43%), with pH values near 7. The number of taxon orders depended on land use; in tree polycultures it was 8 to 6 and 1 to 5 in non-tree monocultures such as maize or induced pasture, which were the sites with the least organic matter contents (1.6-3.5%), available Olsen phosphorus (2-14 mg kg -1 ), and total nitrogen (0.2%), with pH values near 5." @default.
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• W2289351710 date "2007-01-01" @default.
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• W2289351710 title "RELACIÓN ENTRE LA FERTILIDAD DEL SUELO Y SU POBLACIÓN DE MACROINVERTEBRADOS Relationship Between Soil Fertility and its Macroinvertebrates Population" @default.
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