Whether it is direct-seeding cultivation or transplanting cultivation, strict seed treatment must be performed before sowing. Dry seeds are first soaked in hot water at 55-58 degrees Celsius to kill pathogens inside and outside the seeds. When soaking, the seeds are required to enter the hot water, the water temperature is maintained at 54-56 degrees Celsius, maintain for 20 minutes, and the seeds are stirred regularly. When the temperature drops to 54 degrees Celsius, the temperature is increased to 70 degrees Celsius and the temperature is increased to above 70 degrees Celsius. After soaking for 20 minutes, immediately pour out hot water, add cooling water at about 25 degrees Celsius, and then wash the seeds by hand for 10-15 seconds, then change the water to soak the seeds. The amount of soaking water should be more than 5 cm above the seed. Change the fresh water once in the morning and in the evening. Every time you change the water, you must wash the seeds by hand to wash away the slime on the surface of the seeds. The intensity of the washing is lighter than once. After soaking at room temperature for 20 to 25 degrees Celsius for 72 hours, drain off the water and put it in a clean pot or pan. Cover with a damp cloth and germinate at 25-28 degrees Celsius for 24 hours. At this point, it can be seen that a few seeds have been broken and exposed. It has been reported that germination takes 48 hours or longer, and the seeds are sown after the radicles are grown. This can easily damage the radicles during actual operation. The author's many years of practice has proved that as long as the soaking time is sufficient and the temperature of the soaking water is maintained at 20-25 degrees Celsius, after 3 days of soaking, the emergence will begin about 10 days after sowing. Some people worry that soaking seeds with hot water of 55 degrees Celsius will affect the germination of seeds. The author's comparative test results show that seeds treated with hot water at 55 degrees Celsius for 20 minutes can increase the seed germination rate and germination power, and can effectively kill the seeds. Bacteria are effective measures to prevent stem blight through seeds. To achieve this expected effect, one must accurately control the water temperature of the soaking process. Instead of using a triple open-to-cool method to replace the thermometer, the temperature of the water before the seed input is required to reach 57-58 degrees Celsius, and the seed can be dropped after being dropped in. To about 55 degrees Celsius; Second, the soaking duration of 54-56 degrees Celsius can not be less than 20 minutes; Third, after soaking treatment, immediately poured hot water into the cold water. If there is no thermometer to measure the water temperature or lack of relevant conditions can not be soaked in warm soup, can be soaked in cold water for 48 hours, then use 1:500 times 50% carbendazim solution soak for 24 hours, soaking liquid must be higher than the seed 2- 3 cm. Soak the liquid after soaking to sow. In order to prevent the seeds from sticking to the fingers and sticking to each other due to moisture when wet, a little dry fine soil or coal dust can be used to absorb the surface moisture and spread the seeds.
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