Efecto de diferentes usos del suelo páramo, bosque, pasto y cultivo sobre las fracciones orgánicas en los suelos en la Cuenca del Río Chambo

Organic matter (OM) influences soil properties. It comprises labile fractions, particulate OM (POM), and stable ones, humified OM (HOM). This work aims to evaluate the effect of replacing moorland vegetation with pasture or crop and forest with pasture on the contents of total OM, POM, and HOM. Soil samples (0-30 cm) were analyzed on Andosols located in the Chambo Basin. Physical fractionation by particle size was performed, and the OM associated with each fraction was determined. In addition, it was performed: analyses of pH, Melanic index, NaF test, apparent density, and total organic matter. The highest POM content was recorded in soils under moorland (281g/kg) and the lowest value in cultivated soils for less than ten years (158g/kg). The replacement of moorland by cultivation caused a decrease of approximately (123g/kg) of POM. In the same way, the POM content in soils under forest (247g/kg) decreased when it was replaced by pasture to (150g/kg), which caused a loss of (97g/kg). The HOM contents were higher at (175 g/kg) in low moor soils, and these were significantly higher than the values in crops older than ten years (44 g/kg). In contrast, the change of use from forest to pasture did not affect the HOM contents, which were approximately (122 g/kg). Land- use change most significantly affected the most labile fraction.

• मुख्य लेखक: Miller Arroba, Joselyn Alejandra (author)
• अन्य लेखक: Quinatoa Pilay, Nathaly Gissela (author)
• स्वरूप: bachelorThesis
• भाषा: spa
• प्रकाशित: 2021
• विषय: ANDOSOLES; CAMBIO DE USO DE SUELO; CARBONO; FRACCIONAMIENTO
• ऑनलाइन पहुंच: http://dspace.unach.edu.ec/handle/51000/7804