Greenhouse is a lighting building, so pay special attention to the selection of Greenhouse material when building greenhouse dapeng. It is necessary to have good light transmittance effect when building greenhouse. Light transmittance is one of the most basic wood indicators to evaluate the light transmittance performance of greenhouse. Transmittance is defined as the percentage of light that penetrates into the greenhouse and the amount of light that penetrates outside. The transmittance of greenhouse is affected by the transmittance performance of greenhouse transmittance covering material and the shadow rate of greenhouse skeleton, and with the different solar radiation Angle of different show section, the transmittance of greenhouse is also at any time. The temperature of the car is low and becomes a direct influence of crop growth and selection of crop varieties

Greenhouse construction is needed Greenhouse material should pay attention to the thermal insulation performance, improve the thermal insulation performance of the greenhouse, reduce energy consumption, is the most direct means to improve the production efficiency of the greenhouse. The heat preservation ratio of greenhouse is a basic index to measure the heat preservation performance of greenhouse. The greenhouse heat preservation ratio refers to the ratio of the covered area of the greenhouse light transmittance material with small thermal resistance and the covered area of the whole enclosure structure with large thermal resistance.

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