| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2022: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2021: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2020: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2018: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
|
|---|
| Outline of Final Research Achievements |
Microbial communities in paddy field soil exhibit stable and robust traits though the field is managed with annual submergence and drainage. To elucidate the mechanisms involved in the traits of the communities, dynamics of soil microbial community was investigated for 11 years in a paddy-upland rotational field with 3-year intervals of upland conversion and return to paddy field. The abundance of microbial community, irrespective of aerobes or anaerobes, decreased after upland conversion and increased after returning to paddy field in many cases. The composition of bacterial community in the upland periods was greatly different from that in a continuous paddy field (control), but the similarity in the composition between the two fields tended to increase as the period after returning to paddy field increased from 1 to 3 years. Annual cultivation of paddy rice under flooded conditions may create and maintain the stability and robustness of the microbial community in paddy field soil.
|
