With the reduction of the average temperature, in order to avoid freezing food crops, we must carry out the installation of greenhouse greenhouses, but do not know that in the whole process of the installation of PO film, in order to achieve its temperature application specifications, we must also carry out the actual operation of the internal temperature of PO film, so as to ensure its internal temperature and promote the growth of plants.

1. Select high ridge planting in the PO membrane. When transplanting, subfilm can be covered on the ridge, which can raise the soil temperature by 2-3 ° C, and when planting flat ridge, small arch shed can be added to raise the internal temperature.

2. Use brewing heat to increase the temperature. The temperature is caused by the dissolution of microbial strains in the brewing materials such as horse manure, chaff, wheatgrass, and fallen leaves, so as to improve the floor heating and increase the temperature inside the PO membrane.

3. Arch suspension light curtain. The wall suspension behind the greenhouse PO film is coated with a metal material layer of plastic film or tin foil. Every 2-3 meters of suspension is a 1 meter light curtain, which reduces the digestion and absorption of energy in the wall, can increase the temperature of the arch shed by 2-3 ° C, and also improves the sunlight exposure of the arch shed, promoting the coloring of peach trees, tomatoes and other fruits.

4. Rotate on both sides, shovel more deep soil. After transplanting vegetables and fruits, rotate the soil at 5cm away from the seedling. When the local temperature is higher, it can be fertilized here, covered and restored.

The arch shed is to open the wind mouth near the bottom to water the flowers to reduce the temperature, in order to avoid the pests outside the shed to drill into the arch shed, generally set a sunshade net near the arch shed to water the flowers. Generally, the plastic greenhouse film on both sides of the arch is pulled up 50-60 cm high, and the sunshade net prepared in advance can be replaced, so that the "drafts" can be generated in the arch shed, which not only reduces the temperature and humidity of the arch shed, but also can reasonably prevent pests from entering.

Therefore, in order to ensure the growth and development of crops, we must strictly carry out practical operations in accordance with the method of PO film warming, which can not only ensure the temperature inside the PO film, but also reasonably improve the growth and development of food crops and increase production.

Summers are rainy, and the advent of rainy weather is both good and bad for agriculture. Abundant precipitation can provide sufficient moisture to food crops. For PO film, precipitation is very easy to be poured into the vicinity of PO film, resulting in some diseases of vegetables and fruits. Therefore, some farmers do not open the film to water the flowers when it rains, which is also a good way to prevent precipitation from pouring into the film, but in this way, the heat flow in the vegetable greenhouse and the moisture in the body can not be dispersed, which is also harmful to food crops. Therefore, it is not enough just to reduce the wind and temperature at the top.