The hazards of snowfall to greenhouse vegetables are many: First, mechanical damage. Due to the gravity of snow, the snow is too thick and it can often collapse the unstructured greenhouse. It is estimated that when the thickness of snow is about 20 cm, 20 kg of snow per square meter can be reached, and the weight of snow on the roof of each mu of greenhouses can reach 13 tons or more. Such a heavy burden is a concern for bamboo and wood structures and other simple greenhouses. It is difficult to support and it is easily damaged. The second is insufficient light. There is no sunshine in the snow itself. In addition, in order to keep the greenhouse warm, a number of layers of grass cover and other coverings are added outside the shed to make the light in the shed seriously insufficient and photosynthesis cannot be carried out. The third is freezing injury. As the saying goes: "The snow is not cold and snow is cold." Snowfall is often accompanied by low temperatures. Improper management can easily cause damage to greenhouse vegetables. Preventive measures: Improve the structure of the greenhouse. Conditions can be used sheds with steel and concrete skeleton structure. If bamboo and plastic pipe frames are used, their load capacity should be carefully tested and arched designs should be used to enhance support capabilities. At the same time, the roof should have a certain slope, making it difficult for snow. Sweep snow. During the daytime snowfall, it is necessary to cover the mane grasshoppers, cover them with grasshoppers, remove the snow immediately after the snow stops, take snowfalls at night, and sweep snow after the snow stops in the morning to keep the cover dry. When the snow is particularly large, whether it is during the day or at night, it must be followed by a sweep to prevent the snow from overcrowding. Strengthen the management of the cover. After the snow, the cover was peeled off in time for the seedlings to see the light, and the continuous cloudy snow weather suddenly turned fine. After peeling off the cover, we must observe the changes of the seedlings, find the wilt, immediately cover it with a bristle mantle, and then recover and uncover it. Then cover, so repeated, after 2 to 3 days, can be transferred to normal management; if it is unveiled, it is easy to cause "down seedlings."
Various products of Boxes of Wolfberry King, providing product images and basic parameters with each Bulk Boxes Goji Juice Concentrate and Boxes Goji Concentrate;Medlar since ancient times to Ningxia wolfberry real estate herbs, the highest medicinal value. Ningxia wolfberry tip mostly white spots, this field is not medlar, Ningxia wolfberry sharp white spots can reach 85%. Ningxia wolfberry 90% into the water does not sink, both Tea, soup and so on are floating in the water. We are a professional Chinese supplier of Boxes Goji Concentrate, and look forward to your cooperation!
Special Grade Chinese Wolfberry
Special Grade Chinese Wolfberry,Special Grade Goji Berries,Goji Berries Nutrition,Goji Berries Benefits
Ningxia ZhongYuanDa Agel Ecommerce Ltd. , http://www.freshwolfberry.com