With the continuous development of agricultural technology, plastic film has become an important agricultural product, according to the Yunnan Statistical Yearbook, the number of agricultural films used in Yunnan in 2021 will reach 11730,000 tons, widely used in the production of various crops, with the subdivision of planting demand, more and more types of mulch, in addition to white mulch, black mulch, there are weeding mulch, silver and black mulch, black and white mulch, etc., today we will talk about the principle of action and its application of black and white mulch.
How it works
Black and white mulch film is a unique design of mulch film, the integration of white mulch film and black mulch film advantages, the material is mostly polyethylene, the film is composed of black and white parts, because of its material, can create a closed environment after covering, reduce the air layer exchange, moisture is not easy to volatile, effectively store soil moisture, maintain humidity, can achieve a good moisture retention effect.
The black and white parts of the black and white mulch film work differently. The light transmittance of the white part can reach more than 90%, and the crop absorbs more light energy for photosynthesis, and the light energy is then converted into heat energy, and the heat energy is stored in a closed environment, and the crop can grow rapidly in a suitable temperature and humidity and sufficient photosynthesis environment.
The light transmittance of the black part is between 24% and 33%, and the low light transmittance can effectively block the light, and the space under the film is sealed, so that the weeds can not get sufficient carbon dioxide, light and nutrients, and can not successfully complete photosynthesis, so as to achieve a good weeding inhibitory effect.
The principle of black and white mulch film is mainly to use the unique structure to play the advantages of black and white parts to regulate the growth environment of crops.
Types and applications
There are two main types of black and white mulch films on the market: one is black and white and black, commonly known as "single white black and white mulch", and the other is black and white black and white, commonly known as"Double white, black and white mulch"。
Black and white mulch film has a wide range of applications and is suitable for a variety of crops, but its applicability is slightly different for the two structural types of "single white" and "double white". The mono-white black and white mulch film is widely used in single-row planted crops, such crops are lush and need to have sufficient row spacing to ensure the growth of the plants, such as corn, flue-cured tobacco, ginseng fruit, pepper, etc.
Right. 1. Second from right: black and white mulch.
The application of black and white mulch film is slightly inferior to that of black and white mulch film, but the reasonable application can save the number of films, improve the utilization rate of farmland and crop yield, and can be applied to the planting of potatoes, sweet potatoes, strawberries, tomatoes and a variety of vegetables.
In the application of black and white mulch, for different crops also need to consider their growth characteristics to their thickness, black and white part width, longevity or not, etc., the choice of film can not be generalized, should be selected and purchased under the guidance of professionals, pay attention to the use of **, and promote the development of green agriculture!