无定形氧化铁作为嫌气下NH4+氧化时电子受体的研究
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INVESTIGATION ON AMORPHOUS FERRIC OXIDE ACTING AS AN ELECTRON ACCEPTOR IN THE OXIDATION OF NH4+ UNDER ANAEROBIC CONDITION
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    摘要:

    通过15N示踪试验,以及根据嫌气条件下含15NH4+培养液加无定形氧化铁后全氮回收量下降(损失15N约15%),以及产生15NO215N2O、15N14NO、15NO、15N215N14N等含N气体的研究结果,初步证明无定形氧化铁可作为嫌气下NH4+氧化时的电子受体,这可能是引起水田土壤中铵态氮肥损失的又一机理。目前因无各种合15N氧化物标准气体,无法对其形成的含15N气体组分进行定量,这一机理对氮素损失的贡献究竟有多大?尚需进一步研究。

    Abstract:

    The loss of nitrogen in the medium treated with amorphous ferric oxide was investigated with 15N-labelled ammonium sulfate in the incubation flasks under anaerobic condition. The gaseous composition of the atmosphere air in the upperspace above the same medium solution in the serum bustle was analyzed by Organic Mass Spectrometer during the experiment period. It was found that various gaseous fractions of 15N and nitrogen Loss occurred in the medium contaming 15NH4-N due to applying amorphous ferric oxide under anaerobic condition. The gaseous Fractions emited from the medium involved 15NO2, 15N2O, 15N14NO, 15NO, 15N2 and 15N14N. The rate of 15N lass was about 15%.It was primarily proved that the amorphous ferric oxide may act as an electron acceptor in the oxidation of NH4+-N under anaerobic condition. It rnay be another mechanism for nicrogen loss in paddy soils.

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李良谟,潘映华,伍期途,周秀如,李振高.无定形氧化铁作为嫌气下NH4+氧化时电子受体的研究[J].土壤学报,1988,25(2):184-190. Li Liangmo, Pan Yinghua, Wu Qitu, Zhou Xiuru, Li Zhengao. INVESTIGATION ON AMORPHOUS FERRIC OXIDE ACTING AS AN ELECTRON ACCEPTOR IN THE OXIDATION OF NH4+ UNDER ANAEROBIC CONDITION[J]. Acta Pedologica Sinica,1988,25(2):184-190.

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  • 在线发布日期: 2013-02-25
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