| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2013: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2012: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2011: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
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| Outline of Final Research Achievements |
Nitrogen (N) concentration in soil water and N-flux from root zone to groundwater has been measured in four experimental plots of different fertilizer application (organic, standard chemical, half chemical, and no fertilizer) and natural grass field with no fertilizer and no harvesting. N-budget in zoot zones was also obtained. As the results, N-flux to groundwater was 10-25% of fertilizer input, but consumption of stored nitrogen continued, which exceeded the N-leaching, even after 10 years of constant fertilizer application. On the other hand, in the grassland denitrification is almost equal to N-input from atmosphere.
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