Study on the effect of light distribution on the greenhouse environment in Chinese solar greenhouse.

15: 40–17:10, the carbon dioxide concentration of each measurement line showed an increasing trend, with the increase of 61 ppm, 76.2 ppm, 72.7 ppm, 64.6 ppm, and 81.5 ppm. 17:10–9:00 of the next day, the carbon dioxide concentration of each measurement line showed an increasing trend, with the starting concentration of 412.3 ppm, 363.3 ppm, 262.7 ppm, and 409.6 ppm, 509.0 ppm, and rising at 540.1 ppm, 503.5 ppm, 494.5 ppm, 520.5 ppm, 540.5 ppm.

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1 of each measuring line was the highest in this time period; the light intensity of the measuring point at the higher part of the same span height was larger, and the temperature of the measuring point of each measuring line gradually showed a decreasing trend with time; the average outdoor temperature in the low-light zone time period was −1.2°C; The average temperature values of the measuring points at the top of the same measuring line in measuring lines 1−6 were 26.3°C, 30.8°C, 31.1°C, 29.2°C, 29.8°C, 30.8°C, respectively, and the temperature differences between them and the corresponding measuring point No. 1 of the measuring line were −3.7°C, 5.8°C, 6°C, 4.5°C, 3.3°C, 4.9°C, respectively.

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