Compared with the conventional cucumber seedling raising method, the “four highs and four lows†seedling raising technique can bring about fast and neat seedling growth, strong seedling growth, strong stress resistance, and a low part of the melon, which is 7 days to 10 days ahead of schedule and increases production by 20%-30. %. The main points of its technical procedure are as follows: High-temperature soaking, cryogenic seed storage according to conventional selection, remove pods. The selected seeds were soaked in warm water of 13°C for 4 hours, then they were put into a cloth bag and stored in a refrigerator at 5°C overnight. The next day, they were rinsed with cold water and drained for use. High-temperature germination, low-temperature germination The alternate seeds are germinated at a high temperature of 30°C to 40°C, and all germinate in about 24 hours. 2 hours after budding, the temperature dropped to about 20°C and the budding began. The time was about 20 hours. High temperature seedling and low temperature seedling seedlings are important measures for obtaining strong seedlings and preventing leggy. Keep about 40°C at room temperature before sowing, and pour boiling water on the clay. When the soil temperature reaches 40°C, warm the seeds and sow the seeds. The experiment showed that under the high temperature conditions of 40° C. and 30° C. soil temperature, the seedlings can be topped with soil for 24 hours to 36 hours. After the top soil of the seedlings, the temperature dropped to about 20°C, and the seedlings were kept for 2 days. After the seedlings were transplanted at low temperature, the seedlings were kept at a temperature of 30°C-35°C and the soil temperature was kept at 30°C. This shortened the period of seedling sowing. After easing the seedlings, keep it at 25°C during the day and 13°C-15°C at night to promote seedling growth. Ten days and 15 days before planting, the plants were cultivated at low temperature. The temperature dropped to 20°C during the day and 8°C to 9°C during the night to enhance the adaptability and resilience of the seedlings. Carbon Black, also known as carbon black, is an amorphous carbon. It is a light, loose and extremely fine black powder with a very large surface area, ranging from 10~3000m2/g. It is the product of carbonaceous materials (coal, natural gas, heavy oil, fuel oil, etc.) under the condition of insufficient air after incomplete combustion or thermal decomposition. Made by natural gas called "gas black", made by oil called "lamp black", made by acetylene called "acetylene black". In addition, there are "tank black", "furnace black". According to the carbon black performance is divided into "reinforced carbon black", "conductive carbon black", "wear-resistant carbon black", etc. Can be used as a black dye, used in the manufacture of Chinese ink, ink, paint, etc., also used as a rubber reinforcement. Imported Premium Carbon Black,Food Contact Black Carbon,Gas Channel Black,Premium Carbon Black Xingbang High Molecular Materials Co., Ltd. , https://www.chemicaladditive.com