How to Improve the Light Transmittance of Greenhouse Agricultural Film? A Detailed Explanation of the Latest Methods
During the use of greenhouse film, because of pollution, attached water droplets and dust, its light transmittance capacity will be greatly reduced, which will seriously affect the photosynthesis of crops, and this is extremely unfavorable to crop growth. Therefore, farmers need to take measures to improve the light transmittance of the greenhouse film, so how should it be done? Let's take a look together.
I. How to Improve the Light Transmittance of Agricultural Film
1. Cleaning
To improve the light transmittance of greenhouse film, in addition to designing a good lighting angle during construction and promoting the use of drip-free film, it should be cleaned once every week during use. This can clean the dust and bits of grass on the greenhouse film and increase the light transmittance of the greenhouse film by 5%-8%.
2. Wipe with dry fine soil or gypsum powder
During greenhouse cultivation, the humidity in the greenhouse is relatively high, and water droplets will attach to the greenhouse film no matter what, which will also affect the light transmittance of the greenhouse film. Before laying, dry fine soil or gypsum powder can be sprinkled on the greenhouse film, then wiped repeatedly several times with a towel or cloth piece and then wiped clean, and then the treated side should face inward. This can reduce water droplet attachment on the greenhouse film.
3. Spray soybean powder
Wiping with dry fine soil or gypsum powder can only be maintained for a period of time, and afterward water droplets will still attach. At this time, soybeans can be ground into fine powder, using 7.5-10 grams of soybean powder per sq m of greenhouse film, mixed with 150 grams of water, soaked for 2 hours, then filtered with fine gauze. After removing the residue, spray it with a sprayer onto the water droplets on the greenhouse film. This can make the water droplets fall quickly and can also keep new water droplets from forming for about half a month.
4. Turn over and sun-dry the greenhouse film
You can choose a windless, sunny noon, remove the film and turn it over so that the side that originally faced upward faces downward, then fix it in place. This can also reduce water droplet attachment and greatly improve light transmittance.
II. Dust Removal Techniques
When the temperature is high, washing with water causes relatively little damage to the greenhouse film, but in low-temperature seasons, if washed with water, it is very easy to freeze, making implementation relatively difficult. If manual wiping is used, it will inevitably scratch the greenhouse film and make the greenhouse film dirty, leading to a decrease in light transmittance. Although these two methods can be used, they are time-consuming and labor-intensive. A cloth strip with a length of 0.5~0.7 m and the width of the greenhouse film can be placed every 1.2 m on the greenhouse film, with both ends tied to steel wires, so that the wind can make the cloth strip swing to remove dust.
The above is an introduction to how to improve the light transmittance of greenhouse agricultural film. We hope it can help you. If you want to learn more related knowledge, please keep following us.