Which is better, black plastic film or white plastic film? Why?

Black plastic film has a good effect of inhibiting weeds, and white plastic film has a good effect of promoting ground temperature rise.

First, let's look at the white plastic film. Good light transmittance, can increase the ground temperature by 2℃-4℃ after covering, and has a wide application range. White plastic film has good light transmittance, good effect of promoting ground temperature rise and easy adhesion to soil. However, white plastic film also has disadvantages. Because the white plastic film has good light transmittance, weeds can fully carry out photosynthesis, so weeds grow faster.

Black plastic film is not easy to transfer heat in the sun, which inhibits soil temperature rise. The light transmittance of black plastic film is only 10%, which can effectively inhibit the growth of weeds, and can be used in areas with many weeds to save weeding cost. Covering the soil with black plastic film can keep the soil temperature changing smoothly and the organic matter in the normal circulation state.

Of course, black plastic film also has disadvantages. Black plastic film does not heat up as fast as white plastic film, and it is more difficult to degrade than white plastic film, which has a certain impact on the environment.

How to choose plastic film in actual production

In actual production, white plastic film is mainly used in the production of eggplant, fruit vegetables and winter vegetables because of its good thermal insulation effect. If it is used in other seasons, it is not good for the growth of plant roots because of the high ground temperature. When it is used, it is mainly tiled and covered.

The black plastic film has small temperature difference and good air permeability. Suitable for crops with low requirements for ground temperature, especially in summer. Commonly used for fruit tree seedling mulching. When in use, it can be tiled on the ground to expose crops outside the film, or it can be tiled between crops.