First, lime disinfection

When the hottest weather is selected, the remnants of the former loquats will be cleared, 50-100 kg of quick lime will be applied per acre, and 1000-2000 kg of rice straw, wheat straw, and corn stalks will be covered in the furrows, and the ridges will be used to turn lime and straw. Machine or plowing rods can be turned deeply and buried in the ground. The depth is 30-40cm. It is best to deep-throw twice. The straw should be as short as possible. After plowing, it should be compacted, and the soil surface should be completely closed with the old film without damage. Soil water loss and temperature drop, water from the film, until the surface is fully wet until water accumulation.

Second, high temperature disinfection

The greenhouse can be completely closed. It is required that the temperature in the 20cm soil layer reach 40°C for 7 days, or 37°C for 20 days. This can effectively kill bacteria, root-knot nematodes and other harmful organisms in the soil. After the disinfection is completed, plowing (30-40cm in depth is appropriate, to avoid the deep-seated creatures turning to the surface), after drying for 3-5 days before sowing or planting.

Third, ultraviolet disinfection

The use of light radiation to sterilize the soil is utilised to sterilize it by ultraviolet light. The source of ultraviolet light is the most natural sunlight. Spread the configured culture soil and expose it to the sun for three days. In order to increase the intensity of ultraviolet rays, a reflective plate is usually used. The reflective plate uses the light reflection effect of the aluminum foil, and the aluminum foil plate faces the sunlight obliquely to the ground, and the aluminum foil is accepted. The sun's rays are reflected or refracted to the ground to increase the temperature of the soil. The reflective plate can make the soil surface temperature reach 50°C, and the temperature 20cm below the ground can reach 15°C-20°C. This can eliminate large amounts of bacteria and pests (eggs) in the soil. )Wait.

Fourth, hot water disinfection

Soil hot water disinfection is the use of high-temperature hot water disinfection machine to produce high-temperature hot water to sterilize the soil, using high-precision sensors to control the temperature of hot water, using a circulating pump to make the water temperature uniform. Divided into coal-fired soil hot water disinfector, hot water delivery system, hot water dispenser and drip irrigation system and other three parts. This technology is the use of high-temperature pipes to transport high-temperature hot water above 92 °C to the cultivating matrix tanks or cultivating pots that require disinfection of greenhouses.

The 20cm deep soil temperature can be raised to above 50°C within 2 hours, 1-2 hours above 50°C, 3.5 hours above 45°C, and soil temperature around 30cm deep is about 33°C. After observations before and after treatment, it was found that when the soil was disinfected with high-temperature hot water, a large number of root-knot nematodes in the soil were basically killed.

Fifth, pharmaceutical disinfection

Pharmacy disinfection uses various chemical agents or biological agents to sterilize soil by spraying, watering, soil mixing, and fumigation. The main drugs used are pesticides such as formaldehyde, metsylamine, chloropicrin, and methyl bromide, and sterilization. Agent.

1, spray or irrigation method

The agent is diluted with water to a certain concentration, sprayed on the surface of the soil with a sprayer, or directly poured into the soil, so that the liquid penetrates into the deep soil, killing the bacteria in the soil. Sprinkler application of soil disinfection is suitable for Daejeon, nursery nutrition soil, greenhouse cultivation and so on.

The main pesticides used in the spray method are formaldehyde, dasammonium, and Bordeaux mixture. Formaldehyde has obvious effects on the control of black spot, gray mold, rust, brown spot, and anthrax. Desmonsium can control black spot, downy mildew, powdery mildew and blight of flowers, and can also effectively prevent various diseases of bulbous bulbs. Bordeaux liquid has obvious effects on the control of black spot, gray mold, rust, brown spot and anthrax.

2, poisonous soil method

Toxic soil method is to mix the medicine with poisonous soil and then apply it. Toxic soil is prepared by mixing the pesticide (emulsion, wettable powder) and fine soil with a certain humidity in proportion. The application methods of toxic soils include furrow application, hole application and application. Poisonous soil method can play a role in soil disinfection, but also can play a role in killing insects and killing grass. It can be used in rice fields, vegetable fields, and orchards. The medicines need to be adapted to local conditions and vary from crop to crop.

3, fumigation method

Fouling agent is injected into the soil using a soil injector or a soil sterilizer. Covers such as a thin film are placed on the surface of the soil, and toxic gases from the fumigant are diffused in the soil in a closed or semi-enclosed facility to kill germs. After the soil is fumigated, the seeds can only be sown after the pesticide is fully distributed. Otherwise, it is easy to produce phytotoxicity. Common soil fumigation disinfectants include methyl bromide, formaldehyde and chloropicrin. This method can be applied to the cultivation of strawberry, watermelon and vegetables in facility agriculture.

Neuro-Endoscopy Instruments

We're professional Neuro-Endoscopy Instruments manufacturers and suppliers in China, specialized in providing high quality medical instruments with reasonable price. We warmly welcome you to buy or wholesale bulk Neuro-Endoscopy Instruments for sale here and get quotation from our factory.

Neuro-Endoscopy Instruments,Neuroendoscopy Instruments,Neuroendoscopy Set,Endoscope Holder

Tonglu WANHE Medical Instrument Co., Ltd , https://www.tlvanhurhealth.com