日光温室温度变化与热量状态分析

对陕北和关中地区日光温室温度变化和热量状况的对比观测试验结果表明,陕北地区日光温室的最高气温、平均气温和10cm土温分别比关中高9.9～10℃、1.8～2.3℃和1.0～1.3℃,是理想的发展区域.日光温室夜间失热的主要途径为贯流放热,失热量占总热量76%以上;其次是土壤横向传热,失热量占总热量12.5%～13.2%,换气放热失热量最少,占总热量5.6%～10.7%.加强夜间草帘覆盖和挖防寒沟是保温的主要方法.

Analyse on Variations of Temperature and Quantity of Heat in Solar Greenhouse

By means of comparative ex perimentation, this paper was intented to research the variations of temperature and quantity of heat on greenhouse in Shaanbei and Guanzhong stations.It showed that the maximum of temperature, average temperature and 10cm ground temperature in Shaanbei greenhouse was greater than that of Guanzhong.It is an ideal region of developing greenhouse.The major way of lossing heat at night is through around structure which accounts for 76% of all lossing heat.The second way is crosswise lossing heat by soil which accounts f or 12.5%~13.2% of all lossing heat.The final way is chink lossing heat which accounts for 5.6%~10.7% of all lossing heat.Therefore, covering grassy marshland at night and digging cold preventive ditch are major ways of heat preservation.