添加氧化铁对水稻土中H2、CO2和CH4形成的影响

应用生态学报 ›› 2003, Vol. ›› Issue (8): 1313-1316.

添加氧化铁对水稻土中H₂、CO₂和CH₄形成的影响

曲东¹, 张一平¹, S. Schnell², R. Conrad³

1. 西北农林科技大学资源环境学院, 杨凌 712100;
2. University Giessen, Institute of Applied Microbiology, IFZ-Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany;
3. Max Planck Institute for Terrestrial Microbiology, Karl-Frisch-Strasse, 35043 Marburg, Germany

收稿日期:2002-02-09 修回日期:2002-05-17
通讯作者: 曲东,男,1960年生,博士,教授,主要从事土壤环境化学的教学和研究,发表论文40余篇.Tel:029-7091152,E-mail:dongqu@public.xa.sncn.
基金资助:
国家自然科学基金资助项目(4014100540271067)

Effect of iron oxide addition on hydrogen, carbon dioxide and methane geneses in paddy soil

QU Dong¹, ZHANG Yiping¹, S. Schnell², R. Conrad ³

1. Northwest Science and Technology University of Agriculture and Forestry, Yangling 712100, China;
2. University Giessen, Institute of Applied Microbiology, IFZ-Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany;
3. Max Planck Institute for Terrestrial Microbiology, Karl-Frisch-Strasse, 35043 Marburg, Germany

Received:2002-02-09 Revised:2002-05-17

摘要/Abstract

摘要： 水稻土是甲烷产生的重要源地.厌氧条件下甲烷的形成与有机质厌氧降解产生的乙酸、H₂和CO₂有关.氧化铁作为电子受体可有效地竞争有机质向甲烷的转化,其抑制作用机理可能与乙酸、H₂和CO₂的有效消耗有关.通过向水稻土泥浆中添加无定形氧化铁和纤铁矿,分别测定了25℃厌氧恒温培养105d过程中的H₂、CO₂和CH₄的浓度变化.结果表明,添加无定形氧化铁及纤铁矿可导致H₂浓度显著降低;无定形氧化铁对H₂消耗的影响明显大于纤铁矿;添加不同氧化铁对CO₂浓度的影响与H₂浓度的变化有相同的趋势;添加氧化铁能显著抑制水稻土中甲烷形成,并导致有机碳的转移发生变化,使得CH₄-C显著降低,气相中CO₂-C量减少,而由土壤泥浆固定的CO₃^2--C量显著增加.

关键词: 水稻土, 甲烷形成, 氧化铁, 氢, 二氧化碳

Abstract: Paddy soil is an important contributor for atmospheric methane. The methanogenesis is related to the production of acetate, hydrogen and carbon dioxide during the decomposition of organic matter under anaerobic conditions. As electron acceptors, iron (Ⅲ) oxides can effectively compete with electrons in the transformation of organic matter into methane. Its mechanism maybe relates to the consumption of H₂ and CO₂. After added ferrihydrite and lepidocrocite, the H₂, CO₂ and CH₄ were determined during the anaerobic incubation of slurries at 25 ℃ for 105 days. The results indicated that the addition of ferrihydrite and lepidocrocite could greatly decrease the concentration of H₂, CO₂ and CH₄, and ferrihydrite had a stronger effect than lepidocrocite. In this system, the balance of organic-C was disturbed, CH₄-C and CO₂ Cwere reduced, but the CO₃^2--C fixed by slurry was greatly increased.

Key words: Paddy soil, Methanogenesis, Iron oxide, Hydrogen, Carbon dioxide

中图分类号:

S151.9

曲东, 张一平, S. Schnell, R. Conrad. 添加氧化铁对水稻土中H₂、CO₂和CH₄形成的影响[J]. 应用生态学报, 2003, (8): 1313-1316.

QU Dong, ZHANG Yiping, S. Schnell, R. Conrad . Effect of iron oxide addition on hydrogen, carbon dioxide and methane geneses in paddy soil[J]. Chinese Journal of Applied Ecology, 2003, (8): 1313-1316.

参考文献

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添加氧化铁对水稻土中H₂、CO₂和CH₄形成的影响

Effect of iron oxide addition on hydrogen, carbon dioxide and methane geneses in paddy soil

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