| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1990: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1989: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Research Abstract |
1. Chuushin area, central part of Nagano prefecture, was selected as this study field. The fundamental data of meteo-hydrological and terrain information in the field are collected and recompiled.
2. Vertical distributions of air temperature and humidity under various land surface ( i. e. paddy field, upland field, bare land, grass land and so on) were measured in typical diurnal variations of each season. And then, heat balance under various surface conditions were analyzed. As the parameter of the relationship between soil water conditions and plant productivity, Bowensh'ratio under various soil surfaces were estimated from above measured data. The ratio indicate the possibility of effective parameter of showing the limited soil moisture conditions in each season.
3. Ecological parameter of paddy-rice (ex. photosynthesis, leaf area, evapotranspiration and so on), which is cultivated under various soil water and soil fertilizer levels at the experimental fields, was measured during the growing season. The result shows the amount of photosynthesis was mainly restricted by soil water stress and the development of leaf area was limited by soil fertilizer conditions.
4. The evaluating-flow introducing the potential productivity on land-use planning was discussed.
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