The Effect of Nitrogenous Fertilizers on Methane Oxidation in Soil


KARA E. E. , ÖZDİLEK H. G.

EKOLOJI, cilt.19, ss.1-9, 2010 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 19 Konu: 74
  • Basım Tarihi: 2010
  • Dergi Adı: EKOLOJI
  • Sayfa Sayıları: ss.1-9

Özet

One of the most prominent applications to increase agricultural yield is the application of nitrogenous fertilizers to the soil. The intermediate and final products of the mineralization/humidification include carbon dioxide (CO(2)), methane (CH(4)), and nitrous oxide (N(2)O) are released into the atmosphere while other final products are cycled into the soil upon completion of the related reactions that take place in soil. Released CO(2), CH(4), and N(2)O are the most notable factors responsible for global warming and are claimed to be remarkably serious When one accounts for all of the agricultural lands and other similar fields all around the globe. In the present study, the impact of NH(4)NO(3) with 26% N, which consisted of 19% NH(4)-N (ammonium-N) and 7% NO(3)-N (nitrate-N), with and without nitrification inhibitor in the soil on CH(4), CO(2) and N(2)O gas emissions was monitored in a controlled laboratory environment as three parallel experiments. The amount of fertilizer applied to the soil layer was 90 kg N per hectare. The two treated soils and one control soil were incubated at 60% maximal water holding capacity at 25 degrees C during the test period of 18 days to investigate, (a) nitrogenous fertilizer (NH(4)NO(3)), (b) nitrogenous fertilizer phis nitrification inhibitor (NH(4)NO(3) + N.I.), and finally (c) control for CH(4), CO(2), and N(2)O emissions. Gas compositions from the experimental soils were sampled at predetermined times in order to assess the CH(4) release along with N(2)O and CO(2) emissions. Analyses of the headspace on the 1(st), 2(nd), 4(th), 7(th), 10(th), 14(th) and 18(th) days were completed in order to evaluate gas concentrations. The overall results indicate that NH(4)NO(3) fertilization and NH(4)NO(3) with a nitrification inhibitor application causes a statistically significant decrease in CH(4) emissions and an increase in CO(2) emissions into the atmosphere. N(2)O emissions were found to be statistically different with the NH(4)NO(3) application and control treatments. Yet, no significant change was observed in, the N(2)O concentrations with respect to nine, based oil the NH(4)NO(3) with a nitrification inhibitor application compared to the control group.