| Project/Area Number |
59440008
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
作物
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| Research Institution | Obihiro University of Agriculture and Veterinary Medicine |
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Principal Investigator |
GEMMA Takuma 帯広畜産大学, 畜産, 教授 (50003067)
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| Project Period (FY) |
1984 – 1985
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| Project Status |
Completed (Fiscal Year 1985)
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| Budget Amount *help |
¥7,900,000 (Direct Cost: ¥7,900,000)
Fiscal Year 1985: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1984: ¥5,900,000 (Direct Cost: ¥5,900,000)
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| Keywords | Growth promotion techniques / Field crops / 生育促進技術 |
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| Research Abstract |
The effective utilization of solar energy is most important to obtain maximum crop yield in Hokkaido. The aim of this study was to apply the growth promotion techniques to field crops grown under the defective climatic conditions.
1) In maize, it was revealed that germination percentage, growth habit and freezing hardiness at low temperatures have no correlations with each other.
2) Transplanting method in silage corn was tested. Although transplanted medium and late maturing cultivars could reach to mature stage, yields of them were not satisfactory.
3) Yield increases in maize-bean intercrop system were observed. Attained maximum yield was contributable to positive cooperation of each crop.
4) The yield in square plantings increased by about 10% as compared to conventional row plantings, but the effect of square planting seemed to be complicated among cultivars.
5) The number of tillers and plant height of orchardgrass cultivars with different cold tolerance were examined under low temperatures. The more tolerant were the cultivars, the lower the rate of increase in these characters, indicating that cold sensitivity is related to plant dormancy.
6) The leaf temperature was measured with several crops in mid-summer. The difference between leaf and air temperatures varied from 5 C to 12 C. Sometimes, it will be harmful to physiological processes in the leaf.
7) Temperature and freezing injury of orchardgrass crown without snow cover were examined and it was shown that the slight differences in crown temperature and freezing injury affect the survival of stubbles and the yield in the following season.
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