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2, formalin disinfection method. Each cubic meter of culture soil was sprayed with 40% formalin 50 times solution 400 to 500 ml, mixed and evenly stacked, 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 a few holes are inserted at a certain distance above. Each cubic meter of the culture soil is injected into the hole with 3.5 g of carbon dioxide, and then the hole is blocked with soil, and then covered with a film, and sealed for 48 to 72 hours.
4, chloropicrin disinfection method. Make the culture soil into squares 30 to 40 cm high, at a distance of 20 cm, use a wooden stick to punch a hole 20 cm deep, inject 5 ml of chloropicrin into each well, seal with soil, then water, and then cover with a film. 15 to 20 days, the film is repeatedly mixed and evenly sterilized and insecticidal.
5. Potassium permanganate disinfection method. For the flower seeding cutting seedbed, after the soil is turned into a bed, it is poured with 0.1% to 0.5% potassium permanganate solution, and the soil is covered with a film cover for 2 to 3 days. After the film is removed, it is slightly hydrophobic and then sown or cut. It can kill the bacteria in the soil and prevent rot and blight.
1, drying, frying method. The culture medium of river sand such as flower seedlings is placed on the concrete floor before sowing for 2 to 3 days, killing germs and eggs.
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