作物のガス障害に関する研究 : 第6報裸麦およびなたねの光合成におよぼすSO_2ガスの影響

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Experiments were undertaken to examine the relation between photosynthetic rate, air-temperature, concentrations of sulfur dioxide and treatment time for which rape and barley were exposed to the gas. The results obtained were as follows : 1. Photosynthetic rate of rape and barley was markedly decreased with an increase in the concentration of sulfur dioxide and an extention of treatment time exposed to the gas, especially in the plots treated by 5 and 10 ppm-SO_2, it was found that respiration exceeded photosynthesis. 2. The rate of apparent photosynthesis was decreased by about 160% in 8 hours after barley exposed to 10 ppm-SO_2, and about 140 % in 7 hours after rape exposed to 5 ppm-SO_2, comparing with the control (0 ppm-SO_2), respectively. The rate of decrease of apparent photosynthesis (R) was calculated by the following formula : R(%)=(A-B)/A×100 Where, A and B denote the apparent photosynthesis of the control (0 ppm-SO_2) and that of each treatments (5, 10 and 20ppm-SO_2), respectively. 3. Making a comparison between the rate of decrease of the apparent photosynthesis to 0 ppm-SO_2 of rape and barley under the condition of 20℃, there were frequent occasions when that of barley showed higher than that of rape. 4. As the result of experiment, the rate and degree of the apparent photosynthesis to 0 ppm-SO_2 [showed generally higher values under the condition of 20℃ than 10℃ in both plants. From the present experiment, an injurious effects of sulfur dioxide on the apparent photosynthesis of rape and barley varied with difference of air-temperature during treatment with sulfur dioxide, the concentrations of sulfur dioxide and treatment time for which both plants were exposed to the gas.
日本作物学会の論文
1970-02-28

作物のガス障害に関する研究 : 第6報裸麦およびなたねの光合成におよぼすSO_2ガスの影響

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作物のガス障害に関する研究 : 第6報 裸麦およびなたねの光合成におよぼすSO_2ガスの影響

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作物のガス障害に関する研究 : 第6報裸麦およびなたねの光合成におよぼすSO_2ガスの影響