What are the scientific methods to kill pathogenic bacteria in the soil?

During the fallow period of the shed in August, chopping rice and wheat straw is equal to slaked lime plus urea, ploughing, irrigation, etc., closing the greenhouse, and treating it for about 20 days. In the selection of varieties, disease-resistant and disease-resistant varieties can be selected, which can greatly reduce the harm of image-borne diseases. Reasonable implementation of crop rotation, which is the most economical and effective way to prevent and control soil-borne diseases, reasonable crop rotation, especially water and drought rotation, good control, can be reasonable prevention and control of diseases.

1. Sunlight disinfection. Put the prepared culture soil on a clean concrete floor, wooden board or iron sheet, spread it thinly, and expose it to the sun for 3-15 days, which can kill a large number of pathogen spores, hyphae and pest eggs, pests and nematodes. 2. Steam disinfection.

1) Pot steaming and disinfection method: put the nutrient soil into the steamer, heat it to 60-100, and last for 30-60 minutes (the heating time should not be too long, so as not to kill the beneficial microorganisms that can decompose the fertilizer and affect the normal growth and development of flowers). (2) Disinfection cabinet disinfection method:

A large gasoline drum or box with a lid is converted into a steam sterilizer, and then a pipe is passed through its wall to connect it to a steam stove (heating boiler, etc.). Load the culture soil into the cabinet (barrel), open the valve of the inlet pipe, let the vapor enter the gap of the soil layer, and be careful not to seal it too tightly, in case of **. After 30 minutes, it kills most bacteria, fungi, nematodes and insects, and deactivates most weed seeds.

3. Boiled and sterilized. Pour the culture soil into the pot, add water and boil for 30-60 minutes, then filter off the water and dry to moderate humidity.

The commonly used 84 disinfectant can be used, and the concentration should not be too large, generally two to three percent. Use a sprayer to disinfect evenly. Stir the soil while spraying.

With the continuous development of industry, the rural soil near factories and enterprises has been polluted to varying degrees. All kinds of exhaust gases are transmitted to the soil through wind, air, etc. The indiscriminate discharge of hazardous sewage is also gradually polluting the soil.

In addition, the excessive use of pesticides and fertilizers eventually leads to bacterial diseases in the soil.

Solution 1:Sprinkle lime, plant ash, rotting farm manure, coal slag, charcoal slag and so on on the diseased land. These can kill all kinds of harmful bacteria in the soil, and they also have certain benefits for crop growth.

After sprinkling, plough deeply, to a depth of about 30 cm. Then bask in the sun for a month, as much as possible