The adoption of a cucumber “four highs and four lows†breeding method can make seedlings robust, strong resistance, low guarana, melon yards dense, the morning city 7 to 10 days, an increase of 30%. The introduction is as follows: 1. High-temperature soaking seed cryopreservation Seed immersed cucumber seeds in warm water of 13°C for 4 hours, then remove them and put them in a cloth bag, put them in a refrigerator at 5°C for one night, and take them out in cold water on the second day. After controlling the net, put the bag into the basin for use. 2. High-temperature germination Low-temperature germination The seeds in pots were germinated at a high temperature of 30-50°C, and all sprouted in 24 hours. Buds arched mouth cooled to 20 °C after two hours of budding for 20 hours. 3. High-temperature seedlings Seedlings kept at a temperature of 40°C at room temperature before sowing, and poured water into the soil. When the soil temperature reaches 40°C, the seeds that have germinated are sown. After 24 to 36 hours at a high temperature of 40[deg.] C. and a soil temperature of 30[deg.] C., the seedlings can all be soiled. After the seedlings had rammed the soil, the room temperature was lowered to 20°C for two days. 4. High-temperature seedlings Seedlings grown at low temperature after transplanting, the room temperature is maintained at 30-35°C, and the soil temperature is maintained at 30°C. After easing the seedlings, it is maintained at 25°C during the day and 13°C to 15°C during the night. 10 to 15 days before planting, the seedlings were cultivated at low temperature, and the temperature dropped to 17 to 20°C during the day and 8 to 9°C at night. FFP2 Protective Half Mask,FFP2 Earloop Half Face Mask,Half Particulate Respirator,Disposable FFP2 Filtering Half Mask Henan Aklly Filter Engineering Co., Ltd , https://www.akllyfilter.com