How to choose plastic film when growing vegetables and why only black plastic film is used to grow strawberries?

Plastic film is used to cover plastic film, almost all facility vegetables are covered with plastic film, even in open field vegetables are covered with plastic film, there are many benefits of plastic film mulching, plastic film is used to cover plastic film, plastic film is used to cover plastic film, almost all facilities vegetables are covered with plastic film, and plastic film is used to cover plastic film. Plastic film is a plastic film used for plastic film mulching, and plastic film mulching is used for plastic film mulching in almost all facilities for vegetable planting.

People basically accept the fact that there are many benefits of growing vegetables and covering plastic film, but now there are too many kinds of plastic film on the market, including our common transparent plastic film, black plastic film, silver and black plastic film, and reflective plastic film. So what about the use of all kinds of plastic film in growing vegetables, and how should we choose in actual production in order to avoid unnecessary economic losses caused by misselection and misuse?

Let's talk about the characteristics and usage of all kinds of plastic film.

Ordinary transparent plastic film

1. Ordinary transparent plastic film

This kind of plastic film is the most familiar and used most, and the material is mainly made of polyethylene. The biggest advantage is to increase the ground temperature. After covering, the topsoil around 5cm can increase the temperature by 5-6 ℃. Due to the increase in ground temperature, fruits and vegetables, melons and legumes can be put on the market at least 5-10 days earlier than open-field vegetables. The soil temperature under plastic film can reach 60 ℃ in summer, which can be used for soil disinfection. The disadvantage is that it is easy to breed weeds and appropriate weeding measures are needed.

It is precisely because the warming effect of this kind of plastic film is good, it is mainly used for eggplant fruit vegetable production in early spring and winter vegetable production, and if used in other seasons, it will be harmful to root growth because the ground temperature is too high.

This kind of plastic film also has the effect of preserving fertilizer and improving soil structure, because the plastic film can reduce the volatilization of nitrogen in the soil, prevent Rain Water from flushing, and keep the soil loose.

Black plastic film

2. Black plastic film

In recent years, more and more people use black plastic film in vegetable production. We must find out the advantages and disadvantages of black plastic film, and don't use it wrong. Black plastic film is generally produced by LDPE, this kind of film is relatively thick, the pulling force is large, and it can be used at least two or three crops. One of the main characteristics of black plastic film is that it is effective in weeding. It is precisely because of this feature that strawberries are often used in the production of strawberries, watermelons and potatoes. Strawberries grow a large number of weeds and cannot spray herbicides. Weeding or weeding is even more unrealistic, so the good choice is to use black mulch.

Another feature of black plastic film is that the soil temperature does not increase obviously or even drop by 2-3 ℃ after mulching, which is suitable for vegetables such as tomatoes, beans, sweet peppers and other vegetables that do not require high soil temperature, or for vegetable production in summer and autumn high temperature seasons. some data show that in the cultivation of summer and autumn watermelons, the use of black plastic film can increase production by about 30% compared with ordinary transparent plastic film.

Silver black mulch film

3. Silver and black mulch film

Silver-black mulch film, also known as reflective film, is silver on one side and black on the other, mainly made of PE. This kind of mulch film has strong functionality and high price, and is mainly used in plots with many insect pests, especially aphids. When used, the silver side is facing up, the black side is facing down, and the silver side is reflective to avoid aphids so as to reduce the spread of the virus, and the black side can reduce the low temperature by 4-6 ℃.

Silver-black plastic film is generally used in summer vegetable production to provide heat-proof cultivation for vegetables and form a good growth environment. It is called the protective umbrella of summer melon and vegetable cultivation, which is suitable for the production of lettuce, carrots, eggplant fruits and melons.

Therefore, in the cultivation of vegetables or other crops, we use different plastic film according to our own demands. if the insect pest is more serious, it is best to use silver and black plastic film, and the grass damage is particularly serious. Just use ordinary plastic film for heat preservation and moisturization. this kind of plastic film is also the cheapest.