1997 Fiscal Year Final Research Report Summary
Studies on Exess Water injury of field crops.
| Project/Area Number |
08660318
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
生物環境
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| Research Institution | Okayama University |
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Principal Investigator |
TNAKAMARU Shigemi Research Institute for Bioresources, Okayama University Research Associate, 資源生物科学研究所, 助手 (10116478)
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| Co-Investigator(Kenkyū-buntansha) |
KIMURA Kazuyoshi Research Institute for Bioresources, Okayama University Professor, 資源生物科学研究所, 教授 (10033119)
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| Project Period (FY) |
1996 – 1997
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| Keywords | field crops / excess water injury / photosynthetic rate / chlorophyll contents / meteorological response of plant / High CO2 concentration |
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| Research Abstract |
Japan as a well cultivated region is located in the monsoon aria. So annual precipitation amount is higher than other cultivated region belonging to arid or semiarid climate. Wet injury is one of the important problems to over come in cultivation of soybean or barley. The problem is more severe when these crops are grown in the filed after the rice cultivation where drainage is poor.
To clarify the mechanism of wet injury of these crops, we study on the effect of submerging of root system on photosynthetic rate, transpiration rate and chlorophyll contents of these leaves.
The results are as follows ;
1) Photosynthetic rate of soybean leaves is decreased by submergence of root. Rate is decreased significantly on 5th days after treatment and become 60% of leaves without treatment on 10th day.
2) Photosynthetic rate of barley leaves is also decreased by submerging treatment. Rate is decreased significantly on 2nd day, and photosynthetic activity almost ceased on 5th day.
3) Transpiration rate and chlorophyll contents of barley leaves are decreased by submerging in succession to decline of photosynthetic rate.
4) Effects of submergence root system is enhanced under high CO2 concentration in barley leaves.
5) These experimental results suggest that ageing of leave is accelerated by treatment.
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