In agricultural planting, many different materials are used. In recent years, the scope of greenhouse planting has become wider and wider. Due to the differences in local conditions, the choice of materials is also different. Plastic film is commonly used during planting. There are many kinds of materials, and there are many different colors. Today, Qingzhou Luhong Plastic Co., Ltd. will introduce the difference between white mulch and black mulch.
We cannot say which color of plastic film is good, because each has its own advantages. The key is to see what role the plastic film plays. First look at the white film. After covering with this product, the ground temperature can be increased by 2～4℃, and the scope of application is relatively wide. Because it is a high-pressure membrane, its thickness is only 0.03mm. It has the characteristics of good light transmission, high ground temperature and easy clay, which is suitable for northern regions. Mainly used for crops such as vegetables, melons and cotton. But it also has shortcomings. It has a worse control effect on weed growth than black mulch. This is the problem of the characteristics of the plastic film, because white has good light transmittance, weeds can undergo photosynthesis, so the production speed of weeds is fast.
Next, let’s take a look at colored plastic films: In industrial production, polyethylene resin can be added with colored materials to make mulch films of different colors, such as black, green, silver gray, red, yellow, purple, etc. Today we compare production Take a lot of black mulch as an example. Its light transmittance is only 10%, which can control the growth of weeds and can be used in areas with a lot of weeds to save the cost of weeding. In the sun, it does not transfer heat easily and controls the soil heating. Suitable for summer carrots, cabbage, spinach, and autumn cucumbers. It can keep the soil temperature stable and the organic matter in a normal cycle. In addition, the soil covering it has moderate moisture and less water loss. Of course, it also has disadvantages. It does not heat up as fast as the white film, and it is difficult to degrade, which has an impact on the environment. It is suitable for some crops whose roots require lower soil temperature, and it will control the growth of other unsuitable crops.