Study on behavior of CO2 and O2 gas in soil with a hard pan
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Accession number;03A0495290
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| Title;Study on behavior of CO2 and O2 gas in soil with a hard pan |
| Author;
FUJIKAWA TOMONORI
(Tottori Univ., Aridland Res. Center)
MIYAZAKI TSUYOSHI
(Univ. Tokyo, Graduate School of Agricaltural and Life Sci., JPN)
IMOTO HIROMI
(Univ. Tokyo, Graduate School of Agricaltural and Life Sci., JPN)
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Journal Title;Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering
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Journal Code:S0345A
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ISSN:0387-2335
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VOL.;NO.225;PAGE.397-404(2003)
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| Figure&Table&Reference;FIG.11, TBL.1, REF.19 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Gas concentration in soil air is different from that in atmosphere, because it is affected by activity of microorganisms and gas diffusion. In our previous study, it was shown that the gas concentrations varied at a hard pan in the field, but the mechanism of the hard pan on gas behavior was not clearly elucidated. In this study, we evaluated the effects of a hard pan on CO2 and O2 gas behavior in soil in column experiments and in simulations. In soil column, it was found that, below the hard pan, CO2 concentration was higher and O2 concentration was lower than above it. Both CO2 and O2 concentration distributions in the column were similar to those in a field with the hard pan. Simulations with measured gas concentration of column experiment suggested that the generation of CO2 gas from microorganisms at the hard pan might be larger, and also, prevention of gas movement by water, and soil particles above the hard pan or large gas flux through the top layer might have kept CO2 concentration low above the hard pan. (author abst.) |
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