2013 Fiscal Year Final Research Report
Charred materials in pedosphere-Dynamics and contribution to carbon accumulation
| Project/Area Number |
23310005
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Nagoya University |
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Principal Investigator |
WATANABE Akira 名古屋大学, 生命農学研究科, 教授 (50231098)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 環境分析 / 二酸化炭素排出削減 / 環境質定量化・予測 / 腐植物質 / 土壌学 / ブラックカーボン / バイオ炭 |
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| Research Abstract |
The present study was aimed at elucidating the dynamics of char, which have a potential to reduce an increasing rate of the atmospheric C concentration, in soil and the contribution of char C to soil C accumulation. In typical types of Japanese soils, char C accounted for 7-63% of soil C. It was suggested that the char bound to soil minerals has a longer residence time than the free-form char although the formation of bound-form char requires a long time. In an incubation of various char samples mixed with a field soil, the half-life of char in the soil was estimated to be 25-205 years, with a longer value for a char abundant in C-layer planes having larger sizes. Such structural characteristics were obtained by producing char at higher temperatures, which were not affected by source plant materials. The charred materials produced at a lower temperature were also sensitive to solar radiation. Chars applied to upland fields did not leach downwards significantly.
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[Journal Article] Production and characterization of humic-like substances from pyrolized plant materials by chemical oxidation2013
Author(s)
Sultana, N., Ikeya, K., Sugiura, Y., Lu, G. Y., Saito, K., and Watanabe, A.
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Journal Title
Humic Sub. Res.
Volume: 10
Pages: 11-19
Peer Reviewed
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[Journal Article] Five crop seasons' records of greenhouse gas fluxes from upland fields with repetitive applications of biochar and cattle manure
Author(s)
Watanabe, A., Ikeya, K., Kanazaki, Y., Makabe, S., Sugiura, Y., and Shibata, A.
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Journal Title
J. Environ. Manage
Volume: (accepted)
Peer Reviewed
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