Why do Dutch advanced glass greenhouses like to use high-transmittance glass to cover
As the most advanced country in the world in facility agriculture, the Netherlands has a high degree of agricultural mechanization, high agricultural output value, but the highest output per unit area with less labor. Then we will find out why high transparency glass is used on the top of some glass greenhouses built in the Netherlands.
First of all, we need to look at the use of greenhouses
In the Netherlands, glass greenhouses are often used to grow high-yield crops such as tomatoes, cucumbers and sweet peppers. Tomatoes and other crops prefer light, so the consideration of light transmittance has a direct impact on their yield. According to their planting data, every 1% increase in light will increase yield by 1%.
The Netherlands develops local climate resources and environment
Because the Netherlands is located at a high latitude, and the sun cannot be directly in winter, it is in an oblique state! Therefore, the Netherlands has less sunlight in winter! Therefore, if we want to engage in infrastructure development, agricultural production and cultivation management must improve the utilization of light from two important aspects , The first problem is that you can use ultra-high light transmission glass as the top cover material. The second is that some glass greenhouses in the Netherlands will install supplementary lighting equipment.
The difference in light transmittance of the top cover material
The top glass is divided into ordinary 4mm or 5mm single-layer tempered glass with a transmission rate of about 87%. The second type is ultra-white low-iron diffuse reflection glass, the light transmittance of which can be around 89%. The third type is treated ultra-white diffuse reflection glass, the light transmittance can reach 92% to 95%
Problems in the construction of Dutch style glass greenhouses
In terms of construction, greenhouse companies in many countries can basically build Dutch greenhouses with almost the same appearance, but there are deficiencies in some core planting management software and experience. The initial investment scale is large, and the investment return period is too long. Secondly, the cost of energy consumption for heating in winter is high in some areas.