New Coverings Help Improve Light Diffusion In The Greenhouse
Light diffusion and transmission can make all the difference when it comes to plant quality and health in the greenhouse. Because of this, today’s coverings manufacturers are focused on products that offer flexibility in diffusion and color, with the goal of both improved light penetration and lower heating costs.
Check out these products for a closer look at some of the latest technology being developed by coverings suppliers.
ChromatiNet Red (Signature Supply)
ChromatiNet Red changes the light spectrum transmitted to plants, reducing the spectrum of blue, green, and yellow light and increasing the red and far-red light spectrum. Thus, the rhythm of plants’ development under red light is increased, their leaf surface is larger, their stems are longer and thicker, and the total foliage volume is higher. The net enables early flowering without decreasing flower quality. The net is suitable mainly for growers who wish to accelerate growth and increase foliage volume plants such as house plants, decorative branches, non-flowering herbs, and a variety of field and nursery plants, especially when the objective is to enhance the development of root systems in shoots and tissue culture plantlets. Flexible, light, strong, and easy to spread, the net is available in various widths. It is recyclable and UV resistant.
• Shade percentage: 29% to 34%
• Weight (gr/m²): 55 to 58
• Hole size (mm): 6 X 8
• Ball burst strength (kg/cm²): 4.2 to 4.4
• Ball burst strength: 59.75 to 62.58 psi
• UV resistance: 5 years
• Maximum width: 10 meters
Aluminet 50-O (Signature Supply)
Aluminet 50-O offers moderate shading for external coverage in a broad variety of crops. The net is designed especially for external coverage of shadehouses, tunnels, and for linked spreading on plastic covering greenhouse roofs. The net prevents irradiation damage in plants and fruits and reduces heat in greenhouses during hot days. It is efficient for energy conservation in winter and is knitted in widths of up to 10 meters, although other widths are available upon request. Aluminet 50-O is flexible, light, strong, easy to spread, recyclable, and UV resistant.
• Shade percentage: 50% to 55%
• Weight (gr/m²): 67 to 76
• Hole size (mm): 3 X 6
• Ball burst strength (kg/cm²): 5.3 to 6.3
• Ball burst strength (psi): 75.38 to 89.61 psi
• UV resistance: 4 years
• Maximum width: 10 meters
• Reflection: 50%
• Diffused light: 60%
• Energy saving: 15%
Solexx (Adaptive Plastics)
Twin-wall Solexx greenhouse covering is a high-density polyethylene plastic (HDPE) that reduces heating costs while providing 98% to 100% diffuse light to plants. The strong shatter-proof glazing protects plants from harsh weather conditions without cracking or discoloration. The flexible Solexx glazing ships in rolls to save money on freight, and the material can be bent around corners (up to 90 degrees) and over roof peaks for a perfect seal. Solexx is easily cut to size with a straight edge and a sharp utility knife.
• Type of covering: Twin-wall HDPE
• Life: 10-year prorated UV warranty
• Clarity: Translucent
• Haze: 100%
• Light Transmission: 70% to 75%
• Gauge: 5 mm
• Extras: 900-foot roll ships on a standard 48-inch pallet
Harmony Diffused Light Climate Screens (Ludvig Svensson)
Svensson recently introduced its next generation of Harmony diffused light climate screens. For example, the Harmony 5747 FR is a new closed structure screen that takes diffused light in the greenhouse to the next level. It scatters sunlight like no other, creating a soft light that covers more parts of the crop and reaches deeper into every plant. Compared to traditional Harmony, plants in shaded spots receive 32% more light. More light exposure and lower temperatures allow plants and people to flourish in the greenhouse. The result is faster growth and stronger plants. Svensson’s complete line of new Harmony screens will be available in open and closed versions and in a wide range of shading levels, all with flame-retardant properties that meet the industry’s highest fire safety standards.
New Harmony climate screens are produced at Svensson’s factory in Kinna, Sweden, and will be available for delivery in time for spring 2016.
Technical details for the 5747 FR:
• Application: Inside
• System: Sliding, Hanging
• Material composition: 100% Polyester
• Pattern: 3 white diffuse, 1 transparent diffuse, 2 white diffuse, 1 transparent diffuse
• Flame retardant: Yes
• Weight: 65 g/m²
• Width of strips: 4 mm
• Shading level in direct light
— Integrated sphere: 57%
— WUR method: 63%
• Shading level in diffused light
— Integrated sphere: 62%
— WUR method: 67%
• Energy saving: 47%
• Warranty: Five years under all types of greenhouse covering; see Svensson’s limited warranty for all terms, conditions, and exclusions in writing.
Luminance (AT Films, Inc.)
Luminance is a highly diffused thermal film that provides high PAR light transmission. The diffused light creates an even light canopy in the greenhouse, reaching the plants from all angles. This helps to eliminate stretching and produces a higher yielding crop. As it is a thermal film, it will help to retain heat in the cooler months and also help to reduce the heat load in the warmer months, as much as 9°F.
AT Films offers two other film products (click on the names of each for technical information):
— Super 4