With the popularization and promotion of facility cultivation, the utilization rate of land is getting higher and higher, which provides conditions for increasing farmers' income and increasing productivity. However, the temperature and humidity under the conditions of the facility are extremely beneficial to pests and diseases. How to disinfect soil in greenhouses is now a very serious problem. Generally, soil disinfection is disinfected with formaldehyde, carbofuran, etc., which not only requires a certain amount of expenditure, but also the residue of the drug is not good for human health. Now introduce a disinfection method that saves money and has good effect - solar disinfection method.
The old waste film is kept for soil disinfection every year. In July and August, the soil is disinfected by using long direct sunlight and high temperature. The specific method is as follows: 1000-2000kg of crushed straw and 30-60kg of quicklime per 667m2 (pH 6.5 or lower, such as the same amount of ammonium sulfate above pH 6.5), deep ploughing, and the whole land is 60-70cm wide and 30cm high. This is mainly to increase the surface area to make the ground temperature rise faster. The old film is covered on the surface of the car, and the ditch is filled with water until the car is soaked. Seal the greenhouse cover for 7 days or more (7d when the weather is fine, if it is longer in the rainy days), the surface temperature can reach 80°C or above, and the general pests can kill. This method of disinfection requires the heat-resistant items in the chamber to be carried out of the chamber because of the high temperature in the chamber.
Yichang Agricultural Science Institute Li Zhigang
Agricultural Bureau of Yidu City, Hubei Province
Gezhouba Power Plant
(Postcode: 443004)
From "Agricultural Science and Technology Newsletter"
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