The weather is very dry. Can trees be covered with plastic film after watering?

I can't. Plastic film mulching can only gather the water in the soil together, that is to say, the water in the lower soil layer is sucked up by transpiration. It seems that there is a lot of water, but there is not much water, and the weather is very dry. After watering the trees, plastic film mulching can't keep water. Plastic film is a kind of floor covering film, usually transparent or black PE film, but also green and silver film. It is used for ground cover to raise soil temperature, keep soil moisture and maintain soil structure.