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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
15/02/1995 |
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Data da última atualização: |
06/04/2017 |
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Autoria: |
ROBERTSON, G. P.; TIEDJE, J. M. |
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Título: |
Nitrous oxide sources in aerobic soils: Nitrification, denitrification and other biological processes. |
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Ano de publicação: |
1987 |
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Fonte/Imprenta: |
Soil Biology Biochemistry, v.19, n.2, p.187-193, 1987. |
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Idioma: |
Inglês |
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Conteúdo: |
Nitrous oxide (N2O) production in aerobic, intac soil cores collected from two forest sites was partitioned into different sources of N2O by subjecting soils to specific inhibitiors during short-term incubations. We used acetylene (10 Pa) to selectively inhibit N2O production by nitrifiers, 100 kPa (100% v/v)O2 to inhibit N2O production by denitrifiers and sterilized soil to evaluate chemical sources of N2O. Individual soil cores were incubated in a reciculating atmosphere under air, 100 kPa O2, and air + 10 Pa C2H2 atmosphere for 3-4 under each condition. Rates of N2O production in air ranged from 2.8 to 8.5 ng N g-1h-1 in soils from the Rose Lake site and from 0.1 to 0.94 ng N g-1h-1 in soils from Warren Woods. The importance of specific N2O sources in these soils varied among soil cores within each site. In the recently disturbed, more fertile Rose Lake site nitrifiers and denitrifiers were both important N2O sources, but in many cores a significant portion of the N2O flux was inhibited by neither acetylene nor O2 implying an alternate N2O source. |
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Palavras-Chave: |
Denitrificacao; Dinitrification. |
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Thesagro: |
Nitrificação; Solo. |
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Thesaurus Nal: |
nitrification; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01645naa a2200205 a 4500
001 1783849
005 2017-04-06
008 1987 bl --- 0-- u #d
100 1 $aROBERTSON, G. P.
245 $aNitrous oxide sources in aerobic soils$bNitrification, denitrification and other biological processes.
260 $c1987
520 $aNitrous oxide (N2O) production in aerobic, intac soil cores collected from two forest sites was partitioned into different sources of N2O by subjecting soils to specific inhibitiors during short-term incubations. We used acetylene (10 Pa) to selectively inhibit N2O production by nitrifiers, 100 kPa (100% v/v)O2 to inhibit N2O production by denitrifiers and sterilized soil to evaluate chemical sources of N2O. Individual soil cores were incubated in a reciculating atmosphere under air, 100 kPa O2, and air + 10 Pa C2H2 atmosphere for 3-4 under each condition. Rates of N2O production in air ranged from 2.8 to 8.5 ng N g-1h-1 in soils from the Rose Lake site and from 0.1 to 0.94 ng N g-1h-1 in soils from Warren Woods. The importance of specific N2O sources in these soils varied among soil cores within each site. In the recently disturbed, more fertile Rose Lake site nitrifiers and denitrifiers were both important N2O sources, but in many cores a significant portion of the N2O flux was inhibited by neither acetylene nor O2 implying an alternate N2O source.
650 $anitrification
650 $asoil
650 $aNitrificação
650 $aSolo
653 $aDenitrificacao
653 $aDinitrification
700 1 $aTIEDJE, J. M.
773 $tSoil Biology Biochemistry$gv.19, n.2, p.187-193, 1987.
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Embrapa Pantanal (CPAP) |
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