| Budget Amount *help |
¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2015: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
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| Outline of Final Research Achievements |
Artificial macropores were created in the degraded soils to enhance vertical infiltration. Numerical simulation of infiltration with surface flow was successfully achieved when we assume “air space” above the soil surface. Infiltration was effectively improved when fibrous materials were used, with the filling density of 30%. Column experiments showed that organic matter which was infiltrated into deeper profile has resistivity to decomposition, because of less air and water availability at this profile. Field experiment at subtropical region showed surface runoff and also sediment loss were reduced effectively with the artificial macropore application. The resultant total carbon at this field slightly increased.
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