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大棚蔬菜生产由于是在比较封闭的条件下进行的，其地面蒸发和作物蒸腾产生的气化水大都在棚内，所以棚内相对湿度显著高于露地。而棚内空气湿度过大又是病害多发危害严重的主要因素之一，因此科学调控棚内湿度是大棚栽培中的重要一环。有效控制棚内湿度归结起来有如下8种。①深
Greenhouse vegetable production is carried out under relatively closed conditions. Most of the gasification water produced by ground evaporation and crop transpiration is in the greenhouse, so the relative humidity in the greenhouse is significantly higher than that in the open field. The humidity inside the greenhouse is too large, which is one of the major causes of the serious damage of the disease. Therefore, the scientific regulation of humidity inside the greenhouse is an important part of greenhouse cultivation. Effective control of shed humidity summed up the following eight kinds. ① deep