1, drying, fried method. Seedlings such as sand and other culture medium are planted on the concrete floor before sowing so that they can be exposed to the sun for 2 to 3 days. They can kill germs and eggs.
2, formalin disinfection. Each cubic meter of culture soil was sprayed with 400 to 500 ml of 40% formalin 50 times, and was evenly heaped and sealed with a plastic film for 48 hours.
3, carbon dioxide disinfection method. The culture soil is piled into a cone or a rectangle, and several holes are inserted at a certain distance. Every cubic meter of culture soil is injected into the hole with 3.5 g of carbon dioxide, and then the hole is plugged with soil, and then covered with a film, and the stuffing is blocked for 48 to 72 hours.
4, chloropicrin disinfection method. The culture soil is made into blocks of 30 to 40 centimeters high, 20 centimeters apart, with holes drilled in a depth of 20 centimeters with a wooden stick, 5 milliliters of chloropicrin per hole, sealed with soil, then watered, and then tightly covered with film. For 15 to 20 days, the film was repeatedly mixed and sterilized and killed.
5, potassium permanganate disinfection method. Sowing seedlings on the seedling bed, after soaking in a bed, soiling with 0.1% to 0.5% potassium permanganate solution, covering the soil with the film for 2 to 3 days, removing the film and then re-soaking and then cutting or cutting Can kill bacteria in the soil and prevent rot and blight.
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