日光温室冬季黄瓜生长适温调节方法与应用研究

研究了覆盖物揭盖及冬季天气状况与日光温室温度日变化的关系 ,将日光温室冬季温度日变化分为 4个阶段 :即温度快速上升阶段、保持稳定阶段、快速下降阶段及缓慢下降阶段。不同阶段温度转折点分别用Td、To、Tc 和Tf 表示 ,通过调节 4点的温度 ,可最大限度地控制室温处于黄瓜生长最适范围。通过对两年两地大量试验及观测数据的分析 ,建立了日光温室夜间降温随外界最低气温变化的回归方程 ,据此方程可推算出最佳落苫温度。试验结果表明 ,根据日光温室冬季温度日变化规律及黄瓜对生长适温的要求 ,制定出的日光温室温度调节方法 ,对改善冬季黄瓜光合条件、提高产量行之有效。

Studies on adjustment of temperature suitable to cucumber in solar greenhouse in winter

The relation between coverings and the diurnal variation of temperature in solar greenhouse in winter was studied The variation consists of four continuous states: rapid rising, keeping stability, rapid falling and slow falling, each followed one turning point -T d, T o, T c and T f in turn Adjusting the four turning points could maintain suitable temperature for cucumber growing The data collected from Jinan and Shouguang during 1998-2000 were analyzed by using liner regression method, and the regression equations about the lowest temperature in solar greenhouse changing with the lowest air temperature were established The experiment shows that the management according to the equation gets good effect in improving the cucumber production