SOIL RESPIRATION IN DIFFERENT AGRICULTURAL USES

Abstract

The purpose of studying soil respiration in different soils with varied use systems in the Cundinamarca Department is to understand the factors that act at different spatial and temporal scales such as the soil complexity, the interactions between its components, the bad handled, and use of fertilizers are factors that cause the edaphic fauna to disappear, being these organisms are very important in soil respiration. The factors that influence soil respiration are soil type, mainly temperature, and humidity, texture, structure, porosity, oxygen availability, soil fauna, agricultural systems, especially its handled, crop type, and biochemical composition of crop residues entering the soil.

The measurements were taken in three sites: Facatativa, in the soil, classified as Pachic Melanudands, in strawberry crop; Sesquile in the soil classified as Humic Dystrudepts in potato crops and Funza, Andie Humedepts, in potato, lettuce, cauliflower, and broccoli crops. For the measurement of respiration, two methods were used: the short-range Krieger colorimetric tubes and Soil Field Tar-Solvita; Additionally, physical, and chemical analyses of the soils were carried out. The response of the soil to the two methods used to measure respiration had a considerable variation, therefore, the most effective method is Draeger equipment, however, Solvita equipment is recommended for short-term investigations or as monitoring in crops.