Sampling frequency to estimate cumulative nitrous oxide emissions from the soil

Frequência de amostragem para estimativa das emissões acumuladas de óxido nitroso do solo

Abstract:

The objective of this work was to assess the influence of gas sampling frequency on the cumulative emissions of nitrous oxide (N₂O) from the soil. Gas emissions were assessed over a period of two years (2014-2016), in four systems: eucalyptus forestry, crops, pasture, and native forest. The cumulative emissions of N₂O were calculated at sampling intervals of 7, 14, and 21 days. The sampling intervals did not influence the final results of cumulative N₂O emissions from the soil in the assessed systems.

Index terms:
agriculture; emission factor; forestry; greenhouse effect; native forest; N₂O