Sampling frequency to estimate cumulative nitrous oxide emissions from the soil

AUTOR(ES)

Nascimento, Alexandre Ferreira do

FONTE

Pesq. agropec. bras.

DATA DE PUBLICAÇÃO

26/08/2019

RESUMO

Resumo: O objetivo deste trabalho foi avaliar a influência da frequência de amostragem de gases na estimativa das emissões acumuladas de óxido nitroso (N2O) do solo. Foram avaliadas emissões de gases durante dois anos (2014-2016), em quatro sistemas: plantio de eucalipto, lavoura, pastagem e fragmento florestal. As estimativas acumuladas de N2O foram calculadas para intervalos de 7, 14 e 21 dias. Os intervalos de amostragem não influenciaram os resultados finais de emissões acumuladas de N2O do solo nos sistemas avaliados.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.

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