2015 Fiscal Year Final Research Report
A rice-chaff and soil composite for plants growth under high-concentration salt solution
| Project/Area Number |
26660201
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Agricultural environmental engineering/Agricultural information engineering
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| Research Institution | Iwate University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | hydraulic lift / 毛管上昇 / 培地特性 |
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| Outline of Final Research Achievements |
We evaluated capillary force and water-retention capacity of three different culture media―RCSC, RCSC prepared using crushed rice chaff (crushed RCSC), and Toyoura sand. The capillary fringe of Toyoura sand was the highest and that of RCSC the lowest of the three culture media, whereas crushed-RCSC had the highest water-retention capacity and Toyoura sand the lowest. We examined Komatsuna growth in a salt solution at concentrations of 2% and 3%. We grew Komatusna plants in the three culture media; some plants were grown best in crushed RCSC, whereas all died in Toyoura sand. The high water-retention capacity of crushed RCSC facilitated root growth at the upper layers of the culture media. However, small particles in crushed RCSC increased the capillary fringe, causing the salt solution to rise to the surface and thus some Komatsuna plants did not survive. The low capillary fringe and high water-retention capacity are minimum requirements for plant growth in a salt solution.
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| Free Research Field |
農業環境・情報工学
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