Effect of Acetylene Concentration on Denitriflcation andRelated Microbial Processes in Anaerobically incubatedSoil SlnrriesEnglish Full Text
CHEN TONGBIN; S.STRUWE and A. KJΦ LLER(Experimental Station for Agruecology and Environmental Technology, Institute of Geogmphy, ChtneseAcademy of Sctences, Beijing 100101( China))(Department of Geneml Micrubiology, University of Copenhagen, Sφlvga
Abstract: In order to study the influence of difference in C2H2 concentration on the production of CO2, N2O,NH4-N and volatile fatty acids （VFA）, soil slurries with a gradient in C2H2 concentration were anaerobicallyincubated at 25°C for 2 weeks. Acetate, butyrate and CO2 production and NH4-N accumulation wereinhibited in the slurries in the presence of C2H2; and the inhibition effect increased with increasing C2H2from 0 to 20 kpa in the headspace gas of the incubation bottle. However, N2O, isobutyrate and propionateproduction was not obviously different among the slurries amended with C2H2 from 2.5 to 20 kpa. Therefore,the results implied that the C2H2 did not promote the inhibition but only increased the side effect onother microbial processes. The C2H2 of 2.5 kpa was suggested to be the optimum choice for the presentdenitrification study.
Keywords：
acetylene; anaerobic incubation; carbon dioxide; nitrogen transformation; volatile fatty acids;
- Series：
(D) Agriculture
- Subject：
Fundamental Science of Agriculture; Agronomy
- Classification Code：
S153
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