How to adjust the temperature in the winter greenhouse?

1. The reasonable setting of the winter warm greenhouse determines the reasonable greenhouse orientation and improves the lighting and insulation performance. The orientation of the single sloped shed and the impotence is better to sit north and south, so as to receive the maximum amount of sunlight in winter. The arch shed is mainly delayed production in early spring and autumn, and it is appropriate to extend from north to south. Try to increase the inclination of the lighting surface, because the larger the angle, the more the solar radiation in winter, the better the lighting conditions in the facility. The cantilever suspension column structure should be adopted in the shed to reduce the shading area in the facility and improve the lighting conditions. Linyi Fertilizer Network Copyright

2. The quality of the light-transmitting cover of the high-quality greenhouse film protection facilities directly affects the transmitted light intensity and light quality, so high-quality greenhouse film must be selected. At present, PVC film is the most used in the greenhouse. The advantage of this film is that it has good heat preservation, but the PVC film is easy to adhere to dust and the light transmittance is lowered. The long-life film of polyvinyl chloride has a visible light transmittance of 88% and ultraviolet light. The rate is 20%, the infrared light rate is 72%, and the reflectivity loss is small, the heat preservation is good, the anti-aging, easy to stick, and the temperature is 2~4 °C higher than the drop film temperature, so it is now widely promoted and applied. Linyi Fertilizer Network Copyright

3. Take various measures to increase the illumination of the shed in the north wall of the winter warm shed or white on the inside of the gable, which can increase the reflectivity; cover the white film on the floor of the shed when planting; and increase the plant by hanging the reflective film on the three walls. The light intensity at the back of the lower part and the back of the shed will increase the indoor temperature and ground temperature, increase the photosynthetic capacity of the plant, and increase the yield. It should be noted that the reflective film should be flat, and the hanging time should be after 10:00 am and before 3 pm, so that the light in the shed can be fully utilized. Linyi Fertilizer Network Copyright

4, shading when the shed temperature exceeds the temperature of the vegetable growth temperature, and the wind can not be cooled, in order to prevent strong light, high temperature on the leaf burning and high temperature barriers, improve the indoor working environment, shading technology can be used. Shading nets and insect nets are relatively new types of covering materials, and both are playing an increasingly important role in the cultivation of facility vegetables. The measurement results show that the shade net has a strong shading ability. The light intensity in the shade net greenhouse is 43.8% of the open field, and the shading rate of the insect net is 24.7%. The silver shade net can be used. For example, in the summer, using shade nets to cover cultivated tomatoes can reduce the light intensity and temperature, keep the soil moist, and facilitate seedling emergence. Linyi Fertilizer Network Copyright

5. Light quality control adopts a coating that can control light quality, such as a color film, adjusts the proportion of light in the wavelength region of light to control crop growth, and provides special illumination to crops to stimulate the internal tissues of crops to accelerate the growth rate of crops. Regulate and control the environment to avoid weeds and pests, so as to increase production and increase efficiency. Linyi Fertilizer Network Copyright

Reasonable adjustment of greenhouse lighting is the basis for ensuring normal photosynthesis of vegetables, and is also a prerequisite for ensuring high yields and yields of vegetables. I hope that the introduction of Xiaobian can help everyone. Linyi Fertilizer Network Copyright

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