An air-filter chamber to analyze the relationship between global warming and crop production

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An air-filter chamber based on a new idea was designed and set up outdoors. This chamber enabled to add surplus temperature up to 5°C in addition to truck natural changes of temperature. The growth and dry matter production of paddy rice and wheat were those in expected ranges. On the other hand, in relation to global warming, the interaction between ozone and carbon dioxide on paddy rice was examined: ozone inhibited net photosynthesis and photosystem II activities but carbon dioxide ameliorated these inhibitions.