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Effect of carbon dioxide concentration on microbial respiration in soil
Author(s) -
Koizumi Hiroshi,
Nakadai Toshie,
Usami Youzou,
Satoh Mitsumasa,
Shiyomi Masae,
Oikawa Takehisa
Publication year - 1991
Publication title -
ecological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.628
H-Index - 68
eISSN - 1440-1703
pISSN - 0912-3814
DOI - 10.1007/bf02347124
Subject(s) - respiration , carbon dioxide , andosol , soil respiration , microorganism , chemistry , environmental chemistry , respiration rate , flux (metallurgy) , absorption (acoustics) , soil water , zoology , bacteria , botany , environmental science , soil science , biology , genetics , organic chemistry , physics , acoustics
In order to assess the validity of conventional methods for measuring CO 2 flux from soil, the relationship between soil microbial respiration and ambient CO 2 concentration was studied using an open‐flow infra‐red gas analyser (IRGA) method. Andosol from an upland field in central Japan was used as a soil sample. Soil microbial respiration activity was depressed with the increase of CO 2 concentration in ventilated air from 0 to 1000 ppmv. At 1000 ppmv, the respiration rate was less than half of that at 0 ppmv. Thus, it is likely that soil respiration rate is overestimated by the alkali absorption method, because CO 2 concentration in the absorption chamber is much lower than the normal level. Metabolic responses to CO 2 concentration were different among groups of soil microorganisms. The bacteria actinomycetes group cultivated on agar medium showed a more sensitive response to the CO 2 concentration than the filamentous fungi group.