晴转阴天气日光温室内环境因素日变化研究

Study on the Changes of the Environmental Factors During a Day in Solar Green House under the Condition of Sunny Day Turning to the Cloudy

研究了黄瓜日光温室在晴转阴天气条件下的温度、相对湿度、光照强度和CO2浓度等环境因素的日变化以及黄瓜光合速率的日变化。黄瓜日光温室在该天气条件下具有温度较低、光照弱、光合速率较正常情况减少1／2以上等特殊性。指出光照强度是限制因子，并提出了生产中应采取的相应措施。

The changes of temperature, relative moisture,Intensity of illumination and Co2 concentration were studiedDuring a day in solar green house where cucumbers werePlanted, and the photosynthetic efficiency were also studiedUnder the condition of sunny day turning to the cloudy. The Results showed that under such conditions the temperature and Intensity of illumination became lower, the photosyntheticEfficiency was less than half of the sunny day. We think that the Intensity of illumination was the main limited factor. The Countermeasure in planting was also disscussed.