| Project/Area Number |
63560222
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
農業土木
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| Research Institution | YAMAGATA UNIVERSITY |
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Principal Investigator |
KAMIO Akira YAMAGATA UNIVERSITY, FACULTY OF AGRICULTURE, PROFESSOR, 農学部, 教授 (00007072)
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| Co-Investigator(Kenkyū-buntansha) |
WAGATSUMA Tadao YAMAGATA UNIVERSITY, FACULTY OF AGRICULTURE, ASSOCIATE PROFESSOR, 農学部, 助教授 (70007079)
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| Project Period (FY) |
1988 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1989: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1988: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | Phragmites australis(Cav.) Trin. ex Steudel / reclamation in water area / muddy soil / subsoil improvement / soil structure / 土壌養分 / P,N,有機汚濁物質の浄化 / リビングフィルター / N、P、K、Naの浄化(脱窒、脱リン、脱カリ) / 浄化繊維 |
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| Research Abstract |
The drying of the upper soil layer in bare ground is progressing very fast, but that of the deeper layers is difficult. Furthermore, since the coefficient of water permeability of muddy soil after initial reclamation is as low as 10^<-5>-10^<-7>cm/sec and the greater part of soil water is absorbed on the soil particles, it is difficult to move soil water by means of gravity. Introduction of P. communis to polder may be an effective means of desiccating muddy soil, because active transpiration of P. communis plants can reduce soil water in the lower layers of the ground.
P. communis can liberate a large amount of gas especially from the base of the culm into the surface water even under normal pressure in the afternoon in the summer season.
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