节能日光温室温度分布及其变化

在冬季选择典型晴天和阴天 ,定时对节能日光温室内温度进行多点测定 ,结果表明 ,在水平方向上温度呈现南低北高的分布趋势 ,在靠近前屋面薄膜处温度较低 ,前底角处最低 ;顶部放风对栽培畦面温度影响较小 ;土壤温度在栽培畦表层变化较大 ,日较差达 7℃ ,2 0 cm土层日较差只有 1 .6℃ ,而且 2 0 cm土温始终比上层低 ;在连阴天时 ,温室采取补温措施 ,可以维持较高温度 ,补温用散热片安放位置以靠近南端为好 ,这样可使温室内温度分布更加均匀

Temperature Distribution and Variation in Saving Solar Greenhouse

In the representative sunny days and cloudy days in winter，theinterior temperatures in saving solar greenhouse are measured at the designated sites at regular time．The results showed that the air and soil temperatures increase progressively from south to north on a horizontal plane．The air temperatures are relatively lower at front lower margin．The temperature fluctuation of air above culturalbed is not obvious as opining the top vent．In seedbed，the 20 cm ground temperature fluctuates within a narrower range and always is lower than the upper soil temperature．In continued cloudy days，replenishing the heat can support the difference of temperature between inside and outside more than 15 ℃．The radiator had better be put in the front lower margin for well-distributed in greenhouse．