The Effects of Mineral and Organic Fertilizers on
Soil respiration is the production of carbon dioxide from soil as a result of soil organism metabolic processes. One of the most important sources of CO 2 emission is from agricultural fields. Agricultural practices can influence soil organic carbon inputs and outputs being determinant for CO 2 emission. We studied the effects of mineral and organic fertilization on CO 2 emission in a potato field. During the growing season (April - October) the soil respiration was measured with a closed dynamic chamber in a field experiment where 100 kg of nitrogen was applied as mineral and organic fertilizers. The average CO 2 fluxes did not registered significant differences between treatments, mean estimated values were of 4.8 g/m 2/h in control treatment, 4.63 g/m2/h in organically fertilized soil and 4.2 g/m 2/h in mineral fertilized soil. The highest soil CO2 emission was measured during summer, while similar values of soil respiration were observed in spring and autumn.