2013 Fiscal Year Final Research Report
Determining the amounts of organic carbon from root exudates to estimate soil C changes in rice paddy
| Project/Area Number |
23580087
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Plant nutrition/Soil science
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| Research Institution | Yamagata University |
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Principal Investigator |
CHENG Weiguo 山形大学, 農学部, 准教授 (80450279)
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| Project Period (FY) |
2011 – 2013
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| Keywords | イネ / 有機態炭素 / 根の分泌物 / 品種 / 水耕栽培 / メタン / 安定同位体 |
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| Research Abstract |
The amounts of organic carbon from rice root exudates to solution or soil were successfully measured. In the hydroponic culture experiment, the difference of amounts of organic carbon per dry biomass exuded from rice root was more remarkably than that calculating by per plant among 8 kinds of rice cultivars. In the sandy soil culture experiment, the total organic carbon and CH4 in soil solution, and CH4 emissions from the plants were significant difference among 3 kinds of rice cultivars. Furthermore, after rice planted in the C4 soil which organic carbon was low at 0.5% for one season, the soil organic carbon from rice root exudates was measured by stable isotope nature abundance (delta 13C) method. As the results, the soil organic carbon from rice plant was 11.6% of the total assimilation carbon (plant biomass carbon). Approximately 10% of new soil organic carbon was translocated from the roots during one rice growth season.
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Research Products
(16 results)
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[Journal Article] Application of a process-based biogeochemistry model, DNDC-Rice, to a rice field under free-air CO_2 enrichment (FACE)2013
Author(s)
Fumoto, T., Hasegawa, T., Cheng, W., Hoque, M.M., Yamakawa, Y., Shimono, H., Kobayashi, K., Okada, M., Li, C., Yagi, K
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Journal Title
Journal of Agricultural Meteorology
Volume: 69
Pages: 173-190
Peer Reviewed
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[Journal Article] Effects of elevated [CO2] on stem and root lodging among rice cultivars2013
Author(s)
Zhu, C., Cheng, W., Sakai, H., Oikawa, S., Laza, R.C., Usui, Y., Hasegawa, T
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Journal Title
Chinese Sciences Bulletin
Volume: 58
Pages: 1787-1794
Peer Reviewed
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[Journal Article] The contribution of entrapped gas bubbles to the soil methane pool and their role in methane emission from rice paddy soil in free-air [CO2] enrichment and soil warming experiments2013
Author(s)
Tokida, T., Cheng, W., Adachi, M., Matsunami, T., Nakamura, H., Okada, M., Hasegawa, T
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Journal Title
Plant and Soi
Volume: 364
Pages: 131-143
Peer Reviewed
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