In the planting industry, there is a lack of color for mulch, but we commonly use two types of mulch: black and white. Among them, the white film is also a transparent film, and the white film is also a colloquial expression form. But for which film to choose, the main thing is its use or which crop is more suitable? My explanation should be easy to understand, but in reality, the choice of plastic film applications is often followed by the flow, and I think there is nothing wrong with it.
For two types of membranes, it is not possible to say which is good or which is not. It's about which film is more suitable for which crop or what major advantages that film has. In this case, it's a basic basis for selecting which film to use.
① Basic situation of white mulch
As for white mulch, its biggest advantage is that it has relatively good light transmittance. The sunlight cannot be said to be 100% transparent, but it can also pass through 7 or 80%. This has a very good warming effect on the soil, generally increasing by 2-4 degrees. This is a very good choice for sowing in early spring. For example, planted cotton, corn, and melons.
After discussing the advantages of white film, let's talk about the disadvantages of white film. It has excellent light transmittance, which will further promote the growth of weeds. Because the white film has good light resistance and high temperature, the photosynthesis of weeds will be more sufficient. Therefore, when using white film, this weed will grow better.
② Basic situation of black mulch film
For black mulch, its light transmittance is very low, basically around 10%. This has a significant inhibitory effect on controlling the growth of weeds, due to low light transmittance and the inability of weeds to photosynthesis, they will not grow. The temperature of the soil covered with white plastic film does not change much, which is good for the transformation of soil organic matter. However, black film also has its disadvantages, especially its inability to raise the soil temperature, which is not conducive to germination after sowing. The biggest disadvantage of black film is that it is not easy to degrade, which requires technological progress to gradually improve.