| Project/Area Number |
25450363
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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 |
Rural environmental engineering/Planning
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| Research Institution | Ehime University |
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Principal Investigator |
Kume Takashi 愛媛大学, 農学部, 准教授 (80390714)
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| Co-Investigator(Kenkyū-buntansha) |
HARUTA Shinsuke 愛媛大学, 農学部, 教授 (60218659)
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| Co-Investigator(Renkei-kenkyūsha) |
HOSONO Takahiro 熊本大学, 大学院先導機構, 准教授 (30367065)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | ストロンチウム安定同位体 / 微量元素分析 / 土壌塩類化 / 灌漑 / 排水 / 塩類化 / 農業排水 / 安定同位体 / 土壌 / 塩性化 / 営農管理 / 水質形成 / 灌漑期 / 非灌漑期 |
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| Outline of Final Research Achievements |
We measured strontium isotope ratios (87Sr/86Sr) and concentrations of trace elements of irrigation water, drainage water and soil extracted water. Results showed that those concentrations increased from upper stream to downstream.
The 87Sr/86Sr ratios of soil extract of water and acetic acid showed positive relationship, and the ratio of each sampling point showed distinctive value. The data showed salt origins of sampled soils changed from upper stream to downstream; sea water salt were replaced by that from irrigation water and other anthropogenic inputs in the study area. Therefore, the measurements could be applicable to analyze salinization and desalinization process in irrigated soils from past to present.
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