In response to frequent snowfall in the Netherlands, major agricultural insurer Hagelunie has issued targeted guidance to local greenhouse growers on greenhouse snow removal—specifically, melting snow accumulated on roof surfaces quickly through internal heating while adjusting greenhouse climate screen positions, and closing the screens only after the roof snow has completely melted and the structure is no longer at risk. This recommendation is rooted in the insurer’s goal of minimizing snow-induced structural damage to greenhouses, which can result in costly repairs and long-term production disruptions. However, it has sparked intense disputes among industry experts, with conflicting views focusing on the delicate trade-off between ensuring greenhouse structural protection and maintaining optimal crop growth conditions during the greenhouse snow melting process. Annemiek Bosma, a senior lecturer at Het Nieuwe Telen (Next Generation Growing), a leading institution in agricultural innovation, acknowledged Hagelunie’s guidance but issued a clear warning about the potential adverse effects of keeping energy screens fully open for prolonged periods. Ton Habraken, a technical expert from renowned climate screen manufacturer Svensson, echoed this concern, adding that fully opening the screen is not a necessary prerequisite for effective greenhouse snow melting, and the greenhouse climate screen position for snow removal should be...

The light-limiting winter months in high latitude countries pose problems for producers trying to produce fresh fruit and vegetables year-round. Supplemental electric lighting is usually required. However, utilizing electric lighting, even high-efficacy LED fixtures, results in high electricity costs. Long photoperiod of low intensity lighting (up to 24 h (hours) is a promising strategy to meet plants’ light requirement (daily light integral (DLI)), which can be implemented in many countries as utility companies incentivize the use of low-cost, off-peak electricity use. In this study, researchers compared a conventional 16 h white light treatment (Control) to a 24 h treatment which involved a change from white light during the day to blue light at night at a reduced photosynthetic photon flux density (PPFD; dynamic) and a static light treatment which kept both spectrum and PPFD constant for 24 h on 2 cherry tomato cultivars. In addition, each treatment also had a low blue (10%) and high blue (30%) variation. All treatments had the same DLI. It was found that the 24 h dynamic lighting strategies had similar maximum quantum yield of photosystem II (Fv/Fm) as the 16 h controls while that at 24 h static treatments were drastically reduced. In addition,...

Holiday Notice: January 1st – January 3rd, 2025. Normal work resumes on January 4th.

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The following is a new project in the France, using 4mm tempered low iron 50 haze diffused glass, covering an area of ​​5,000 square meters. The light transmittance is ≥97.5%, which is the highest level in the horticultural field. We appreciate the trust of our customers, and the goods we delivered exceeded their requirements both in terms of product quality and delivery speed.Yuhua Glass consistently provides customers with high-quality and tailor-made horticultural glass. We will help customers maximize the profit output of their projects. 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! Need more detailed information or a solution of greenhouse glass? Need guidance on how to choose the right glass for your greenhouse? Consult online customer service, leave us a message or send us an email!

The opening time and duration of skylights in glass greenhouses need to be determined comprehensively based on environmental conditions, crop needs, and greenhouse structure. The following are specific suggestions and analyses: I. Basis for Determining Opening Time Temperature Threshold Summer High-Temperature Periods: When the internal temperature of the greenhouse exceeds the upper limit for crop growth (e.g., 30℃-35℃), skylights should be opened promptly to cool the greenhouse and prevent heat damage. Winter Nights and Early Mornings: If the outside temperature is below 5℃ or the temperature difference is too large (e.g., indoor-outdoor temperature difference > 15℃), opening should be delayed to prevent cold air from directly blowing onto the crops. Daytime Dynamic Adjustment: Morning: When the greenhouse temperature rises to 25℃-28℃, gradually open the skylights 10%-30%, using shading nets to reduce radiant heat. Afternoon: During the peak temperature period (12:00-15:00), skylights can be fully opened, but humidity control is necessary. Evening: One hour before closing, gradually reduce the opening to avoid a sudden drop in temperature. Humidity Thresholds High Humidity Environment: When relative humidity > 85% and lasts for more than 2 hours, open the skylights in conjunction with the circulating fan to accelerate dehumidification and prevent diseases. Low Humidity...