温室栽培作物的产量和质量,决定于管理技术的高低。所谓技术高低,主要是指为作物生长创造环境条件的好坏,这种条件的好坏决定着作物收成的好坏。为了保持温室内良好的环境,就必须解决日常管理中一些困难的问题。例如,对严寒期的低温,一般防寒复盖不能解决,就要 The output and quality of greenhouse cultivated crops depend on the level of management techniques. The so-called technical level, mainly refers to the environment for the growth of crops to create good or bad conditions, the quality of this condition determines the crop yield is good or bad. In order to maintain a good environment in the greenhouse, some difficult problems in day-to-day management must be solved. For example, low temperature in the cold period, the general cold cover can not be resolved, it is necessary