Quantificação das emissões de metano de diferentes fertilizantes nitrogenados aplicados no solo

Abstract

Methane is an important greenhouse gas and plays a significant role in climate change, whose concentration in the atmosphere has increased due to the action of anthropogenic sources. The stabilization of greenhouse gases is necessary to combat the problem of global climate change, as emissions of gases such as CH4 have negative local, regional and global effects on the environment and living beings. The objective of this work was to evaluate the emission of methane from different nitrogen sources applied to the soil of agricultural areas and the mitigation of environmental impact. The experiment was conducted in the field, in the experimental area of UTFPR, Campus Francisco Beltrão – PR. CH4 emissions were measured using the static chamber method, the gases were analyzed in the soil laboratory at UFRGS, – RS. The results were subjected to statistical testing regarding normality and homoscedasticity of variances. Under the conditions analyzed, the CH4 flow indicated greater absorption by the soil, although Ammonium Nitrate (dose 100% and 70%) and Urea with urease inhibitor showed an emission peak, which did not exceed 10 μg. C m-2 h-1, the emission occurred in the first days, the same period in which there were high levels of precipitation that favor lower CH4 oxidation rates. Therefore, there was an emission, however, of little significance and with a greater tendency for absorption by the soil, which acted as a drain for this gas.