| Titre : |
Emissions of nitrogen oxides from equatorial tain forest in central Africa : origin and regulation of NO emission from soils |
| Type de document : |
Tiré à part de revue |
| Auteurs : |
D. Serca ; R. Delmas ; Corinne Jambert ; Louis Labroue |
| Année de publication : |
1994 |
| Importance : |
46B, 243-254 |
| Langues : |
Français (fre) |
| Catégories : |
[CBNPMP-Thématique] Cycles biogéochimiques (carbone, azote, phosphore,etc...)
|
| Résumé : |
Emissions of nitric oxide from soils of equatorial rain forest were measured in the Dimonika Natural Park (4°30’S, 12°30’E) in the Mayombe Forest in Congo. Three research campaigns were carried out in June and July 1991 and in February 1992. Fluxes were measured by dynamic chamber techniques using a chemiluminescence instrument Scintrex LMA3. NO fluxes measured on natural soils are in between 5 and 17 X 109 molecules cm-2 s-1; they are of the same order of magnitude as those observed in similar tropical forest media. Soil treatment experiments show that the auto-decomposition of HNO2 in these acid soils (pH# 4) (chemodenitrification) is a potentially important cause of nitric oxide production in this type of ecosystem. Nitrous acid comes from autotrophic nitrification all the year round, and also from biological denitrification, shown by N2O emissions, during the rainy season. The regulation of NO release from soils is linked to ammonia production from litter mineralisation and to direct NH4 input by throughfall. |
| Lien pérenne : |
DOI : 10.3402/tellusb.v46i4.15795  |
| Permalink : |
https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=130442 |
Emissions of nitrogen oxides from equatorial tain forest in central Africa : origin and regulation of NO emission from soils [Tiré à part de revue] / D. Serca ; R. Delmas ; Corinne Jambert ; Louis Labroue . - 1994 . - 46B, 243-254. Langues : Français ( fre)
| Catégories : |
[CBNPMP-Thématique] Cycles biogéochimiques (carbone, azote, phosphore,etc...)
|
| Résumé : |
Emissions of nitric oxide from soils of equatorial rain forest were measured in the Dimonika Natural Park (4°30’S, 12°30’E) in the Mayombe Forest in Congo. Three research campaigns were carried out in June and July 1991 and in February 1992. Fluxes were measured by dynamic chamber techniques using a chemiluminescence instrument Scintrex LMA3. NO fluxes measured on natural soils are in between 5 and 17 X 109 molecules cm-2 s-1; they are of the same order of magnitude as those observed in similar tropical forest media. Soil treatment experiments show that the auto-decomposition of HNO2 in these acid soils (pH# 4) (chemodenitrification) is a potentially important cause of nitric oxide production in this type of ecosystem. Nitrous acid comes from autotrophic nitrification all the year round, and also from biological denitrification, shown by N2O emissions, during the rainy season. The regulation of NO release from soils is linked to ammonia production from litter mineralisation and to direct NH4 input by throughfall. |
| Lien pérenne : |
DOI : 10.3402/tellusb.v46i4.15795 |
| Permalink : |
https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=130442 |
Serca, D., Delmas, R., Jambert, Corinne, Labroue, Louis
1994
Emissions of nitrogen oxides from equatorial tain forest in central Africa : origin and regulation of NO emission from soils.
Tellus, 46(4)
: 46B, 243-254.
|
46 (4) - 1994 (Tellus)
Emissions of nitrogen oxides from equatorial tain forest in central Africa : origin and regulation of NO emission from soils / D. Serca (1994)
