为探明温室生菜的光合作用与温室小气候之间的量化关系，以实验为基础，研究春、夏季玻璃温室条件下生菜的光合特性，分析温度、光照、ＣＯ２浓度、湿度等环境因子对光合作用的综合影响，初步建立了生菜的光合生产函数，从而可对环境因子进行优化组合以合理利用和调控气象资源测定和优化结果表明：生菜的光合速率在一定范围内随着光强和ＣＯ２浓度的增加而增加，但有一定的极限；夏季的光合速率日变化呈双峰曲线，在启用风机＋湿帘降温系统的情况下无午休现象；夏季较合理的调控参数为：温度３３℃，光强３５０００ｌｘ，相对湿度７５％ In order to study the quantitative relationship between greenhouse lettuce photosynthesis and greenhouse microclimate, we studied the photosynthetic characteristics of lettuce in spring and summer glasshouse based on experiments and analyzed the effects of environmental factors such as temperature, light, CO2 concentration and humidity on photosynthesis , The photosynthetic production function of lettuce was preliminarily established so that the optimal combination of environmental factors could be used to reasonably utilize and regulate the meteorological resources The results of the determination and optimization showed that the photosynthetic rate of lettuce increased with the increase of light intensity and CO2 concentration But there is a certain limit. The diurnal variation of photosynthetic rate in summer shows a double peaked curve, no break occurs when the fan + wet curtain cooling system is activated. The more reasonable control parameters in summer are: temperature 33 ℃, light Strong 35000lx, relative humidity of 75% 