Studies on protecting of vegetable crops from gases, 2; effect of nitrogen dioxide gas on Chinese cabbage, radish, tomato and cucumber
1987
Kim, B.Y. | Cho, J.K. | Kim, M.S. (Rural Development Administration, Suwon (Korea R.). Agricultural Sciences Inst.)
This study was carried out to find out the effects of nitrogen dioxide gas on vegetable crops. Chinese cabbage, radish, tomato and cucumber were used for this experiment, and these crop were fumigated with various concentrations2048of nitrogen dioxide gas for 2 hours under different conditions of light and soil water at the vegetable growth stage. The crop damages measured by percentage of leaf destruction were more severe at the night time fumigation than at the day time, under the full sun condition than under the shading, and at the higher soil water content than at the low soil water content. The cucumber plant showed the highest resistance to nitrogen dioxide gas and tomato plant showed the least resistance. As the nitrogen dioxide concentration increased from 0.05mg/l to 0.2mg/l, the N content in leaves of each crop increased, and the increment of N content in leaves was higher by fumigation at night than at day t
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