2007 Fiscal Year Final Research Report Summary
Rule of organic phosphorous and microbial on phosphorous supply for vegetation in forest soil
| Project/Area Number |
17580125
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
林学・森林工学
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
TODA Hiroto Tokyo University of Agriculture and Technology, Institute of Symbiotic Science and Technology, Associate Professor (00237091)
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| Co-Investigator(Kenkyū-buntansha) |
HAIBARA Kikuo National University Corporation Tokyo University of Agriculture and Technology, Institute of Symbiotic Science and Technology, National University Corporation, Graduate School, Professor (00014960)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Available P / Mineralizable organic P / Microbial biomass P / Tropical soil / Karst soil / Hedley method / P supply / Stricken area of volcanic eruption |
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| Research Abstract |
Phosphorus fractions by Hedley method and microbial biomass P (MBP) have been investigated in general Japanese forest, tropical forest and karst region forest soils to clarify the characteristics of P and P supply to forest vegetation. The results are summarized as follows.
1. Available-P (Ion fraction-P + Bicarb-P) concentrations were remarkable low (under 30 μg P/g), and their values were lower than the annual uptake P by forest vegetation.
2. Mineralizable-P is much in general Japanese forest. Phosphorus mineralization rate from organic P is important for P supply to forest vegetation.
3. In tropical forest soil with strong weathering in East Kalimantan in Indonesia, total-P amount, available-P ratio and mineralizable-P ratio decreased with decreases of forest vegetation.
4. MBP concentrations were greater than labile-P (available plus mineralizable-P) concentrations, so MBP pool is important for P supply to tropical forest.
5. In forest soils in a karst region of the upper Yangtze River in China, both available-P and mineralizable-P have strong positive correlation with soil pH and total-C.
6. Available-P concentrations by Hedley method have positive correlation with P concentrations by Bray II and Olsen methods. Available-P by Hedley is nearly equal to Bray II-P.
7. MBP concentrations were nearly equal as labile-P concentrations, so MBP is index of P supply evaluation in karst region forest.
8. In the region of the thick and very hard volcanic ash sedimentation in Miyake Island, Alnus sieboldiana grew a lot with their root nodule because of poor N supply in the ash layer.
9. The tropical natural forest and Kanto region forest in Japan, which have rich N supply, had P limit condition compared to N condition.
10. We discuss that P supply to root noble is the key to forest recovery in tropical degradation forest and in acid soil on Miyake Island.
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[Journal Article] Microbial biomass and activity along a natural pH gradient in forest soils in a karst region of the upper Yangtze River, China.2008
Author(s)
Tian, Y.(第一著者), Haibara, K., Toda, H., Ding, F., Liu, Y. and Choi D. S.
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Journal Title
Journal of Forest Research 13(印刷中)
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] Microbial biomass and activity along a natural pH gradient in forest soils in a karst region of the upper Yangtze River, China.2008
Author(s)
Y., TIAN, K., HAIBARA, H., TODA, F., DING, Y., LIU, D. S, CHOI
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Journal Title
Journal of Forest Research 13(in press)
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Mapping and mechanisms of acid buffer effect in of volcanic ash on surface soil in Miyake island2007
Author(s)
H., TODA, K., HANAOKA, K., KISHIMOTO, K., HAIBARA, Y., KAMETANI
Organizer
Japanese Society Revegetation Technology, Conference
Year and Date
20070900
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Interrelationships between bacteria, fungi biomass and soil chemical properties in forest soils of Karst region2007
Author(s)
Y., TIAN, F., DING, Y., LIU, H., TODA, K., HAIBARA
Organizer
Japanese Forest Society Conference
Year and Date
20070400
Description
「研究成果報告書概要(欧文)」より
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