| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Outline of Final Research Achievements |
In this study, we conducted research aiming directly to evaluate the stability against the microbial degradation of aluminum (Al) - humus complexes using humic acid as a major fraction of humic substances and humic acid degrading fungi.
In the decolorization test under the coexistence of inorganic substances, no influence of inorganic substances was observed. In the decolorization test using the synthetic Al-humic acid complex, no influence was observed under the dissolved condition. However, under the decolorization test by the suspension culture, the Al-humic acid complex showed a high stability significantly. Furthermore, even in the model oxidative degradation test using hydrogen peroxide, the Al - humic acid complex showed high resistance to decomposition.
Consequently, it is contributed that the improvement of the chemical stability of humic substances by complex formation with Al as a cause of the stabilization mechanism of soil organic matter.
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