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本文分析了番茄长季节栽培日光温室内ＣＯ_２浓度的变化，结果表明：在不放风的条件下，日光温室内的ＣＯ_２浓度存在着垂直差异和水平差异；室内ＣＯ_２浓度的变化与番茄植株生育状态，特别是与番茄株高和叶面积关系密切，也与室内温度、光照度和土壤呼吸有关。因此番茄越冬生产时，如果土壤施入充足的有机质，在植株高度小于５０ｃｍ（或叶面积小于０．２２ｍ~２／株）时，土壤有机质分解释放的ＣＯ_２能够满足番茄光合的需要，不需增施ＣＯ_２，而应改善温度光照条件；只有植株较大、温度和光照条件好、见光到放风时间长时才需要增施ＣＯ_２ 。
In this paper, we analyzed the changes of CO 2 concentration in solar greenhouse grown in long-season tomato. The results showed that there was a vertical difference and a horizontal difference in CO 2 concentration in solar greenhouse under the condition of no ventilation. The change of indoor CO 2 concentration was related to the growth status, Especially with tomato plant height and leaf area are closely related, but also with the indoor temperature, light intensity and soil respiration. Therefore, when the plant is over 50 cm in height (or the leaf area is less than 0.22 m ~ 2 / plant), the CO_2 released by decomposition of soil organic matter can meet the needs of tomato photosynthesis when overwintering tomato, The application of CO_2, but should improve the temperature light conditions; only larger plants, temperature and light conditions, see the light to the wind a long time before the need for additional CO_2.