Relación de la respiración edáfica con las propiedades físico-químicas de los suelos de la microcuenca del río Guano, provincia de Chimborazo

Abstract

The relationship of edaphic respiration (ER) with the physical-chemical properties in the soils of the microbasin of the Guano river, Chimborazo province (MRGPCH), was performed in 72 samples composed of soil at a depth of 0-30 cm, of which 36 samples are in non- intervened soils (Moorland) and 36 in operated (7 in Grassland, 3 in cultivation and 2 in plantation) following the methodology established by GIDAC. The RE was analyzed in triplicate by the titration method and physical-chemical properties (% of organic matter, organic carbon, electrical conductivity, pH, % humidity and bulk density) for each land use. The average results for RE in non- intervened soils is 0.57 ug CO2-C/g per hour unlike in operated soils 0.80 ug CO2-C/g per hour. For organic matter, organic carbon, humidity and electrical conductivity, higher values were obtained in non-intervened soils, the apparent density in non-intervened soils is less than 1 g/cm3 unlike intervened soils whose value greater than 1 g/cm3 and the pH in non-intervened soil fluctuates from 4-5, while in intervened soils it is 6. In non-intervened soils, it correlates significantly with all the parameters studied, while in intervened soils there is no significant correlation. It can be concluded that the correlation of edaphic respiration with the physicochemical properties was different in the studied soils, which may be due to the edafo-climatic conditions of each place. Complementary studies of edaphic respiration using other methods are recommended.