In the case of unheated greenhouse vegetables, some simple and easy preventive measures can be taken to ensure the normal growth of greenhouse vegetables to a certain extent. Here are some commonly used and effective methods. Preparation of hot soil using chicken manure, hot organic fertilizer, cow dung and other breathable fertilizers formulated into hot soil use, that is, when they are decocted take 20% each, mixed with dry fine soil 60%, such nutrient soil endothermic and Good heat performance, so that the growth environment of vegetable seedlings is good, the number of root growth and long, strong absorption function, the growth of robust vegetables, natural cold resistance. Nutritional seedlings use black plastic nutrition seedlings, heat preservation during the day to protect the roots, when the outside temperature is below zero degrees, when the temperature inside the shed is about 5 °C, while the temperature within the nutrition bowl can reach around 8~10 °C, vegetables Seedlings grow slowly and are not affected by freezing. Appropriate application of nitrogen fertilizer seedlings to reduce the amount of nitrogen fertilizer, must not apply chemical nitrogen fertilizer, so as to avoid the cold resistance of vegetables. It is advisable to apply the dressing early to promote the vegetable seedlings. Before the low temperature can not be applied quick-acting nitrogen fertilizer, phosphorus and potassium fertilizer should be topdressing once in order to enhance the ability of cold resistance. In winter, the light is weak, the ability of vegetables to assimilate fertilizers is poor, and photosynthetic micronutrients are sprayed on the leaves to prevent the deficiency of nutrients caused by the lack of nutrients in the root system. In addition, hormones need to be used less or not to prevent the growth from becoming soft and reduce the cold resistance. . Shallow cultivator heat preservation vegetable surface consolidation, during the day when the hot gas into the cultivation layer is limited, heat storage will be reduced, coupled with large and deep cracks, poor soil pellet structure, the former midnight easy to heat, late at night room temperature is low, easy to cause cold damage. If shallow cultivator is applied to the shed soil, it can play a role in breaking the knot and repairing the cracks. It can not only control the transpiration of groundwater to take away heat, but also protect the heat and keep the seedlings cold. The rooting roots irrigated the greenhouse vegetables in the winter. After using the rooting agent, the root system can increase about 60%, and the root depth can increase about 25%. The root system has strong absorption capacity and will not suffer frostbite due to lack of water and nutrient-deficient vegetables. Pouring sufficient water to prevent freezing of winter vegetables due to lack of water. Because the specific heat of water is higher than that of air, heat dissipation is slow. If the soil moisture content is moderate, the pore cracks in the cultivation layer are fine, and the root system is not suspended, the soil insulation can be improved and the root system will not be subjected to freezing damage. Therefore, sufficient water is provided for filling vegetables with sufficient water before winter or selected weather during winter season (above 20°C), and the antifreeze effect is good. Supplementing the vegetables cultivated in the carbon greenhouse, one hour after the sun comes out, the carbon dioxide produced by plant respiration and soil microbial decomposition at night can be absorbed, and then it is in a carbon starvation state. Therefore, in the face of high temperatures on sunny days, the shed film can be opened and closed, and carbon dioxide can be added to the outside to increase the cold resistance and yield of vegetables. When the temperature is low, the shed is closed. In winter, artificially replenishing carbon dioxide can improve cold resistance. Force to increase production. The insulation performance of the multilayer film covering a layer of film is poor, and the minimum temperature is only 2~3°C higher than the open field. Therefore, when the outside temperature drops to -3°C, the temperature inside the canopy is about 0°C, and freezing damage will occur. The greenhouses are required to be covered with a small shed film, and the old sheds are preferably covered with two layers of old agricultural film. For example, the sheds can be covered with woven bags, or shading nets or straw drapes can be kept warmer. Can achieve "three membranes and one curtain" coverage, that is, covering the greenhouse film, a small greenhouse film, plastic film, greenhouse and then covered with straw, then the outside temperature dropped to -5 °C, the general will not produce cold damage. A RFID Reader is a device that uses radio-frequency waves to wirelessly transfer data between itself and a RFID tag/label in order to identify, categorize and track assets. When combined with the right RFID software, a RFID reader can identify objects quicker, more accurately, at a reduced overall cost, and at various points of the object`s lifecycle. RFID to be used in a variety of applications: handheld RFID readers, fixed readers, RFID antennas. 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