the difference of black and white mulch film
The temperature difference of black film is small, the permeability of black film is better than that of white film, the plants of black film are not prone to premature aging, and the ground temperature of black film is high at night.Characteristics of black film: the transmittance of black film is only 1% - 3%, and the thermal radiation is only 30% - 40%. Because it is almost opaque, weeds can not germinate and photosynthesis, so weeding effect is significant. Under the sunlight, the black mulch film increases the temperature rapidly and the humidity is high, but the heat transferred to the soil is less, so the effect of increasing temperature is not as good as that of transparent film, and it also has the effect of cooling in summer and daytime. When used, it can be tiled on the ground to expose the crop plate outside the film, or between crop rows.
Characteristics of white mulch film: the heat radiation rate of white mulch film is 80% - 90%, close to transparent mulch film, and the light transmittance is only 40%, which has a certain inhibitory effect on weeds. It is mainly used for spreading and covering, which can solve the problem of grass damage caused by transparent mulching.
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