In winter, the natural illumination time is short and the intensity is poor, which cannot meet the demand for fruit tree growth. Therefore, in order to achieve high yields and high efficiencies, fruit trees must be first dealt with in the shed. Shelters should be constructed with less shading. Shelters should be sheltered, sun-facing, north-facing, and east-west. If there are adjacent sheds, the distance between the sheds should be maintained at 7-8 meters, and should be kept at 9 o'clock on the winter solstice so as not to shade each other. In the premise of ensuring the structure of the shed is firm and easy to control temperature and humidity, the height of the shed must be properly reduced. The lower the height of a typical shed, the better the lighting effect. According to different tree species to determine the appropriate height of the shed, the shed height of 2.5 meters as the bottom. The structural pillars of the sheds should be less, and the pillars should not be too thick or too wide. The shade of the arches of the sheds should be so narrow that they would be less shady. A suitable greenhouse lighting angle can increase the lighting in the shed, the lighting angle is generally 24-28, and the angle of the rear roof is 45 or so. Choose a good film and keep the film clean to choose PVC and long-lived PVC film and PVC fog film and other light-transparent film is appropriate. Dropless film can improve the transmittance of 20% -30%. The dust and snow on the cover film can be covered with a broom or wood poles or cleaned with a motorized sprayer. The inside and outside of the film can be kept clean, increasing the amount of light injected, which can enhance the effect of light. . Pruning, air ventilation, and light transmission are used to trim and construct air- and light-transmitting tree structures to evenly distribute all kinds of branches in the crown. During the growing season of the tree, pay attention to the topping of the tree, remove the standing branches, dense branches, and the buds at the slashing mouth, so that the light distribution within the canopy is reasonable and sufficient to prevent the overlapping, crowded and disorderly branches, resulting in canopy closure. Increase the light one hour after the sunrise and uncover the grasshoppers and cover the grass after sunset. The roller shutter can be used to uncover the grasshopper, which not only improves the work efficiency but also saves labor. Even cloudy days, snow days, not only short illumination time and weak light intensity, lack of light should be installed to supplement the light source, increase lighting fixtures (such as high pressure sodium, red light, incandescent, fluorescent, etc.). For incandescent lamps, at least 2 to 500 watt incandescent lamps in a shed. After the leaves have been opened from the fruit tree, after the curtains are uncovered in the morning or in the evening, the light is turned on and the light is supplemented for no more than 3 hours per day. Sports Gloves,Outfield Baseball Gloves,Baseball Sliding Mitt,Mens Softball Glove HOLIK ASIA GROUP CO.LTD , https://www.holikasia.com