Estabilidad de los agregados del suelo del sistema lacustre Atillo, parroquia Cebadas, provincia de Chimborazo

Abstract

The objective is to evaluate the stability of soil aggregates in the Atillo lake system, seeking to collect data on the current state of the soil resource. A random-stratified sampling was applied each sampling point a 20m x 20m plot with a depth of 15 and 30 cm, extracting a composite sample of each depth. The analysis of pH and electrical conductivity was used multiparameter, gravimetry for density and moisture, color with Munsell tables, texture by feel, organic matter by ignition and aggregate stability by wet sieving. The analysis of the physical-chemical parameters: the color of the soils is predominantly black and very dark brown, the pH (Paramo: 5.91; Wetland: 5.98) is slightly acid soils, the electrical conductivity (Paramo:27.93 uS/cm; Wetland: 27.31 uS/cm) as non-saline soils, the texture is sandy loam type, the apparent density (Paramo: 0.64 〖g/cm〗^3; Wetland: 0. 29 〖g/cm〗^3) are soils with medium and low density respectively, the moisture (Paramo: 29.27 ; Wetland: 64.15%), organic matter (Paramo: 29.27%; Wetland: 29.27%) with high content for both ecosystems, Soil Organic Carbon (Paramo: 99. 93 Mg-C/ha; Wetland: 171.9 Mg-C/ha), aggregate distribution (Paramo: 66.46% macroaggregates, 26.89% small macroaggregates,8.1% microaggregates; Wetland: 58.76 macroaggregates, 16.24% small macroaggregates,5. 65 % microaggregates), the stability of the aggregates (Paramo: 26.5% stable, 35.3% moderately stable, 2.9% slightly stable; Wetlands: 23.5% stable, 11.8% moderately stable). The results analyzed with ANOVA and Tukey tests, therefore, it is concluded that wetland ecosystems store more carbon than moorland ecosystems, while in terms of aggregate stability, moorland ecosystems are more stable and present high aggregation. It is important to collect information and it is recommended to develop complementary research from the point of view of the habitants of the sector and to look for sustainable development alternatives.