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December 25,2022

High humidity in plastic greenhouse, dehumidifier is required for dehumidification

The humidity in plastic greenhouses is high. Dehumidifier is required for dehumidification. News information believes that many growers should know that the high humidity in plastic greenhouses will affect the normal growth of vegetables, fruits, flowers, edible fungi, traditional Chinese medicine materials, etc. in the greenhouses. The low temperature outside is not conducive to the growth of plants. The production of plastic greenhouses has played an important role in easing the contradiction between the supply and demand of vegetables and fruits in the off-season, However, in order to maintain the temperature in the greenhouse, the plastic greenhouse is often airtight, which can easily lead to an increase in humidity in the greenhouse, inhibit the normal water evaporation of plants, and slow down the water cycle of normal soil growth, thus inducing or aggravating the role of plant diseases and pests, and may also cause flower and fruit fall. Therefore, the greenhouse should be regularly dehumidified, and the humidity should be reasonably controlled

Of course, different vegetables, fruits, flowers and Chinese herbal medicines have different requirements for air humidity. Take vegetables as an example: for example, cucumbers are wet vegetables, which require air humidity of about 85% - 90% RH; Luffa and balsam pear are semi humid vegetables, and the required air humidity is about 70% - 80% RH; Solanaceous fruits and beans are semi dry vegetables, and the required air humidity is about 55% - 65% RH; Watermelon and melon are dry, and the required air humidity is about 45% - 55% RH

There are many rainy days in spring and summer. In addition, the temperature is low. The humidity in the greenhouse is often too high. The air humidity in the greenhouse is usually high. The relative humidity in the daytime is 70%~90%, and at night it often reaches 100% and condenses into water droplets. It is bound to have a very adverse impact on the production of vegetables, fruits, flowers and Chinese herbal medicine in plastic greenhouses. The high humidity in the greenhouse is conducive to the occurrence and spread of various diseases; The reduction of light and temperature will inhibit the growth of vegetables, fruits, flowers and Chinese medicinal materials. Therefore, the emphasis of shed management should be shifted to temperature and humidity management in late autumn and winter and spring

The plastic greenhouse is a relatively closed space. In cold seasons such as winter and spring, transpiration and water evaporation of plants will make the relative humidity of the air in the plastic greenhouse significantly higher than that outside. High humidity environment may cause a variety of diseases, so it is extremely important to reduce the air humidity in plastic greenhouse crops. In the plastic greenhouse, the air humidity can be monitored by the temperature and humidity meter, and of course, it can also be judged by some performances in the greenhouse, such as dew condensation, plant water spitting, shed film dripping, etc. When there is a lot of water spitting and condensation on the plant, and there are a lot of drips on the shed film, it indicates that the humidity is too heavy, and measures should be taken in time to reduce the humidity in the shed

When it comes to dehumidification in plastic greenhouses, the first thing that many farmers think of is the humidity of ventilation signs. At present, the widely used adjustment measures of plastic greenhouse facilities are mainly to reduce the humidity in the plastic greenhouse by opening skylights, side windows and other ventilation, or by assisting simple exhaust fans. Indeed, ventilation is a basic method for dehumidification in greenhouses. However, if the ventilation is too rapid, it is easy to "flash". Therefore, ventilation and dehumidification should be carried out step by step. If the humidity in the shed is too high in the morning, the air can not be released until the temperature of the shed rises. In case of continuous overcast days, do not ventilate, or the humidity in the shed is too high, which may lead to disease

For this reason, the segmented ventilation method adopted by many people is worthy of reference for growers. If the humidity in the plastic greenhouse is too high, some straw, wheat straw, plant ash or fine dry soil can be sprinkled between the rows, or quicklime and other hygroscopic materials can be stacked in the empty space of the plastic greenhouse to absorb moisture. Of course, qualified growers may wish to purchase corresponding power or units according to their actual needs_ The plastic shed dehumidifier and ZD series full-automatic humidity control dehumidifier are also a good method of dehumidification, which can conveniently keep the air in the plastic shed dry and dry with moderate humidity. Under the condition of ensuring the normal and rapid growth of crops, diseases due to excessive humidity will not occur

  _ The plastic shed dehumidifier and ZD series full-automatic humidity control dehumidifier are highly efficient, energy-saving and environment-friendly dehumidifier products manufactured by strict use of professional technology and exquisite workmanship. With an intelligent humidity constant control system, users can automatically control the operation and shutdown of the dehumidifier according to production needs, achieve efficient dehumidification effect through automatic control, and reduce the operating cost of the whole machine. Welcome to inquire about the details of dehumidifier used for dehumidification in plastic greenhouses with high humidity

  _ Reference for technical parameters and model selection of plastic shed dehumidifiers and ZD series full-automatic humidity control dehumidifiers:

Product model - dehumidification capacity - applicable area - power - power - circulating air volume - net weight

_-- 28(L/D)---30-50 (㎡)---420(W)---220V/50Hz--190m ³/ h---15kg

  _-- 58(L/D)---50-80 (㎡)---670(W)---220V/50Hz--850m ³/ h---25kg

  _--- 90(L/D)---90-120(㎡)---1700(W)--220V/50Hz--1125m ³/ h--50kg

  _-- 138(L/D)--130-280(㎡)--2000(W)--220V/50Hz--1725m ³/ h--55kg

  _-- 168(L/D)--180-230(㎡)--2800(W)--380V/50Hz--2100m ³/ h--120kg

  _-- 240(L/D)--240-350(㎡)--4900(W)--380V/50Hz--3000m ³/ h--160kg

  _-- 360(L/D)--360-450(㎡)--7000(W)--380V/50Hz--4500m ³/ h--200kg

  _-- 480(L/D)--500-700(㎡)--9900(W)--380V/50Hz--6000m ³/ H-230kg

◎ Precautions for model selection -- The dehumidification capacity and model of dehumidifier are scientifically calculated mainly according to the volume of the used environment space, the size of fresh air volume, the humidity requirements required by the space environment and other specific values. In addition, it should be noted that the relative humidity of the environment is related to the temperature of the environment. The higher the temperature is, the faster the humidity will evaporate. On the contrary, the worse the effect will be. Therefore, when configuring the dehumidifier, you need to select the type under the guidance of professionals, so that you can select the dehumidifier that is most suitable for you

Core tip: In winter and spring, it is an indisputable fact that the humidity in plastic greenhouses is high, and it is also a disease that troubles many farmers. Because for most economic crops, whether it is low temperature and high humidity, or high temperature and high humidity, these are the main reasons and culprits for disease occurrence and spread. Especially in winter, the outside temperature of vegetables in plastic greenhouses in the north is low, and the need for heat preservation is especially ignored or forced to reduce ventilation and dehumidification. Once the humidity is too high, diseases such as gray mold and downy mildew will be rampant, bringing endless trouble to production management, increasing labor intensity and losing economic benefits

At present, with the improvement of agricultural science and technology, more and more people choose advanced agricultural technology. By now, plastic greenhouse planting technology is not uncommon in rural areas, and more and more people are joining the greenhouse planting industry. They are also greenhouse growers. Some greenhouse growers have high quality output and great economic benefits, but some growers have reduced their output year after year. What is the matter? It may be that you have not mastered the dehumidification skills in the greenhouse! Therefore, it is an important research topic to control temperature and humidity in plastic greenhouse. All the above news and information about the dehumidifier used for dehumidification in plastic greenhouses are provided by Mashima Electric, for your reference only

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