Humidity conditions in greenhouses are directly related to the growth and development of various crops. Scientific and reasonable control of humidity conditions in greenhouse can make the greenhouse form a small environment conducive to vegetable growth and development. It is an important link to ensure high yield, high quality and high efficiency of greenhouse. Usually, the relative humidity of air in greenhouse is higher at night than in daytime, and it is higher in low temperature season than in high temperature season. Relative humidity is greater in cloudy days than in sunny days, the maximum after watering, the smallest before watering, the higher before bleeding, and the lower after bleeding.
Generally speaking, the relative humidity of air is 50%-60% RH in sunny day and 90% RH at night, which is close to saturation. It can reach 70%-80% RH in cloudy day and 100% RH in night, and reach saturation state. Therefore, it is very necessary to use commercial greenhouse dehumidifier to dehumidify effectively in greenhouse, so that the air humidity in greenhouse can be controlled in the most suitable range, so that the crops in greenhouse can grow healthily. Humidity in greenhouse will also directly affect the growth and development of crops.
The requirement of air humidity is different in different stages of crop growth and development. For example, cucumber belongs to wet vegetable, and the required air humidity is about 85% - 90% RH. Luffa and balsam pear belong to semi-humid vegetable. The required air humidity is about 70% - 80% RH. Solanaceae and legumes belong to semi-dry vegetable. The required air humidity is about 55% - 65% RH. Watermelon, melon and so on belong to the dry type, the required air humidity is about 45% - 55% RH.
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