Winter is coming, why are some old farmers covered with plastic film?

For most parts of the country, it is in the cat winter festival. Although the weather in the south is relatively warm, the lowest temperature is relatively cold. Experienced vegetable lovers like to use a plastic film to grow vegetables at this time. A vegetable friend asked, is there anything particular about using it? Is there anything to pay attention to? Let me introduce you.

First of all, the method of planting vegetables with plastic film mulching is generally suitable for early spring planting, which is determined according to the local environmental temperature rather than solar terms. Early spring is generally cold, with a large temperature difference. At this time, sowing and seedling emergence are the first key, and the two main factors that determine seedling emergence are temperature and humidity, and the two major functions of plastic film mulching are to improve temperature and humidity and promote seedling emergence.

The reason for covering the plastic film has been made clear. Next, some vegetable friends may ask, should the covered plastic film be removed? When should it be removed? This problem is divided into two parts, some dishes need to be removed from the shelf, and some dishes have not been removed. First of all, cover leafy vegetables with plastic film after sowing, and remove the plastic film immediately after emergence, otherwise it will easily lead to overgrowth or seedling burning.

The second plastic film is generally used on fruits and vegetables, such as tomatoes, cucumbers, potatoes, peanuts, peppers, eggplant, garlic and so on. In early spring, a notable feature is the low ground temperature. In order to promote the root system of fruits and vegetables to absorb more nutrients, the root and stem are separated by plastic film to reduce the heat loss caused by water evaporation in the soil, thus achieving the purpose of soil warming.

Covering with plastic film also has a water-saving benefit, because covering the soil with plastic film reduces evaporation, which can effectively save water and save a lot of watering time for lazy people to grow vegetables. Every spring, the tomatoes I grow are not watered in the first month after planting plastic film tomatoes, which saves time and effort.

In addition, planting melons and fruits covered with plastic film can also prevent weeds. Because of the lack of air and high temperature during the day, grass seedlings will be burned to death, which also saves the trouble of weeding.