番茄长季节栽培日光温室内CO_2浓度变化的分析

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 。

Analysis of CO_2 Concentration Change of Long-season Tomato Cultivation in Solar Greenhouse

The changes of CO_2 concentration in solar greenhouse during the long--season tomato cultivation were analyses. The results showed that there were vertical and horizontal differences of CO_2 concentration in solar greenhouse without ventilation. These changes were cloud related to the plant growth and development, especially the plant height and led area, as well as the temperature, light intensity and soil breath in greenhouse. In tomato cultivation during winter, to improve the condition of temperature and radiation is mere important, and the CO,_2 enrichment is unnecessary if organic matter content in soil is high enough and plats are short than 50cm or plant led area is less than 0.22m~2, since the CO_2 released from soil organic matter decomposing is mere enough to the tomato photosynthesis. boy when the plants grow higher tinder suitable temperature and radiation condition, and the time is longer before ventilation, CO_2 enrichment is benefit.