Glass greenhouses are currently the highest-quality greenhouse type. Besides the frame, glass is also a crucial component. High-quality glass not only improves a greenhouse’s light transmittance but also significantly increases its production capacity.
What types of glass contribute to greenhouse production capacity?
1. Diffuse glass.
The greenhouse frame irreversibly blocks light, with the side walls being the hardest hit. During cultivation, it’s obvious that crops near the side walls grow poorer than those in the center. Diffuse glass disperses incoming light, evenly distributing it to every corner of the greenhouse.
In soilless greenhouses, the lush branches and leaves at the top of crops block light from the roots. Diffuse glass directs light directly to the roots, preventing the growth of gray mold caused by long-term light deprivation.
2. High-transmittance glass
The light transmittance of a piece of ordinary glass is 88%-90%, while coated glass achieves a light transmittance of 95%-97.5%. We often say that every ounce of sunshine equals every ounce of harvest. Assuming plant photosynthesis is at full capacity, higher light levels significantly increase plant yields. The difference in total productivity between a greenhouse with 88% transmittance and one with 97.5% transmittance is approximately 36%.
3. Suitable Haze Glass
Haze is a key parameter for greenhouse glass, with different haze levels suited to different growing regions. A piece of 30% haze glass has a transmittance of 97.5% and a Hortiscatter value of 16% (±5), corresponding to a hemispherical transmittance of 91.5%. The transmittance at different times is: 0° – 98.9%, 15° – 99.0%, 30° – 98.8%, 40° – 98.5%, 45° – 98.2%, 50° – 97.5%, 60° – 93.0%, and 75° – 63.1%.
Diffusing glass is ultra-clear tempered glass with a light transmittance of 91.5%. Coated diffuse glass, called anti-reflective glass, has a light transmittance of 97.5%.
Have any customers conducted similar experiments? In fact, the results of an experiment [Effects of Different Covering Materials on Cucumber Quality in Low-Carbon IoT Greenhouses] showed that:
Cucumber yield in greenhouses using anti-reflective, high-diffusing glass as a covering material increased by 10.67% compared to conventional float glass when the harvest period was not extended, and by 36.43% when the harvest period was extended. Furthermore, the soluble sugar and ascorbic acid contents increased by 3.6% and 67.62%, respectively, compared to conventional float glass. This demonstrates that anti-reflective, high-diffusing glass significantly improves cucumber yield and quality, making it an excellent greenhouse covering material.
Subsequent trials by Jingpeng, Urban Green, and the Academy of Agricultural Sciences have consistently demonstrated that anti-reflective, high-diffusing glass significantly increases greenhouse yields and is currently the most ideal covering material.
The diffuse glass and AR-coated diffuse glass produced by Yuhua have cooperated with many large commercial greenhouses in agriculture, horticulture, nurseries and experiments. We have cooperated with large greenhouse project companies such as Havecon, Van Der Hoeven, Kubo, etc. for many years. Yuhua greenhouse glass has a light transmittance of up to 99%, and haze 5/10/20/30/50/70/75 greenhouse diffuse glass is available!
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