| Project/Area Number |
59480073
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
農業土木
|
|---|
| Research Institution | Tottori University |
|---|
Principal Investigator |
NOMURA Yasuji Faculty of Agriculture, Tottori University・Professor, 農学部, 教授 (90038183)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
INOUE Mitsuhiro Faculty of Agriculture, Tottori University・Research Assistant, 農学部, 助手 (90032309)
YAMAMOTO Tahei Faculty of Agriculture, Tottori University・Associate Professor, 農学部, 助教授 (00032102)
HASEGAWA Kouichi Faculty of Agriculture, Tottori University・Associate Professor, 農学部, 助教授 (10039331)
YANO Tomohosa Faculty of Agriculture, Tottori University・Associate Professor, 農学部, 助教授 (80032085)
MATSUDA Akiyoshi Faculty of Agriculture, Tottori University・Professor, 農学部, 教授 (10032153)
|
|---|
| Project Period (FY) |
1984 – 1986
|
| Project Status |
Completed (Fiscal Year 1986)
|
| Budget Amount *help |
¥7,000,000 (Direct Cost: ¥7,000,000)
Fiscal Year 1986: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1985: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1984: ¥4,600,000 (Direct Cost: ¥4,600,000)
|
|---|
| Keywords | Greenhouse / Guava(Psidium guajava Linn) / cold resistance / water management / two dimensional soil moisture depletion method / leaf area index / evapotranspiration / 点滴灌漑 |
|---|
| Research Abstract |
1. The weather conditions of the selected places located in the western part of Japan were characterized. The duration of sunshine, the number of fine days and the total integrated temperature in a year in Tottori were found to be much smaller than those in the other places.
2. The branch growth rate of Guava(Psidium guajava Linn) was measured at each growing stage to clarify the growth characteristics. The leaf area index was estimated satisfactory from the length of branch.
3. The cold resistance of Guava was tested under the different conditions of covering for heat insulation; vinyl house, stubble mulching and transparent poly-ethylene mulches. The covering by double layer vinyl house and transparent poly-ethylene mulches was most effective for growth.
4. Evapotranspiration from Guava was estimated by the water balance method using lysimeters with the different types of soil. The method of estimation of evapotranspiration with a compartment model was proposed by considering upward water supply from ground water. The maximum daily evapotranspiration from Guava in Kuroboku soil was 10 mm/day during the period when pan evaporation was heighest. The two dimensional soil moisture depletion method was applied to estimate evapotranspiratin under the drip irrigation condition.
5. From the field survery for farmers and research institutions, it was concluded that the different water, fertilizer and leaf cutting management is necessary in accordance with the different harvests, leaves or fruits, and the local cultural conditions. It was suggested that the water-curtain system that warmer ground water is sprayed between double layer of vinyl house for increase of heat insulation efficiency should be introduced during the winter time.
|
