In the hot summer season, it is a good way to eliminate germs, kill eggs, remove weeds and improve the soil. The so-called high temperature shack is the use of the sun's high temperature and drug fumigation for shed sterilization, generally from late July to mid-August. This method is low in cost, small in pollution, simple in operation, good in effect, and easily accepted by the masses. However, the shed must also pay attention to the method. In recent years, some farmers have not paid attention to the details of the shack, so they can not achieve the effect of sterilization. To this end, I hope that the farmers' friends should pay attention to the following points when they are squatting.

In combination with land preparation, deep fertilization of the fertilization should be leveled, fine, and combined with the site to take deep fertilization, by the opportunity of land preparation, it is best to put chicken manure and cow dung together into the ground, in order to kill the bacteria in the organic fertilizer by high temperature . Chicken manure and dried cow dung also have the effect of increasing the ground temperature and maintaining the ground temperature, which can enhance the bactericidal effect. After the ground is turned over and flattened, the ridges or high and low ridges are formed according to the planting method of the crops, so that a small space is formed between the mulch and the ground, which is favorable for raising the ground temperature.

Watering in sufficient water, increasing the moisture content of the soil is closely related to the bactericidal effect. Practice has proved that the soil moisture content is too low and does not achieve a good bactericidal effect. Generally, the soil moisture content reaches 60% of the maximum water holding capacity in the field, and the irrigation water surface is preferably 3~5 cm above the ground. Combined with irrigation, apply 2 kg of deep tillage per acre to increase the permeability of the soil.

Drug treatment, sterilization and insecticide In the greenhouse where there is a dead tree phenomenon in previous years, each acre can be mixed with 2~3 kg of dead linger and 5 kg of ammonium bicarbonate, and then sprinkled on the ground and deeply 10~15 cm, then pour water, also Lime nitrogen can be used to mulch the soil to cover the soil to kill the bacteria in the soil. In addition, before the greenhouse is closed, the dead body fungus and insecticide are sprayed on the inner surface of the shed to kill the germs and pests hiding in the wall.

Closed greenhouses, high temperature to cover the double-layer cover with greenhouse film and mulch film, strictly maintain the tightness of the greenhouse, under such conditions, the highest ground temperature of 10 cm below the surface can reach 70 ° C, the ground temperature of 20 cm deep can reach 45 Above °C, such high ground temperature sterilization rate can reach more than 80%.

Appropriately extend the shed time. Most of the bacteria are not resistant to high temperatures. After more than 10 days of heat treatment, they can be killed, such as some pathogens, cucumber sclerotinia, cucumber blight, eggplant verticillium, etc. Not very resistant to high temperatures. However, some bacteria are particularly resistant to high temperatures, such as root rot pathogens, tuberculosis pathogens and blight pathogens, and some deep-rooted soil-borne bacteria, because of their deep soil layers, must be treated for 30 to 50 days to achieve better results. . Therefore, when soil disinfection is carried out, the disinfection time should be determined according to the heat resistance of the crops and their corresponding germs in the greenhouse.

The treatment of high temperature shacks after shacking is best for soils not exceeding 15 cm deep, and the effect on soils over 20 cm deep is poor. Therefore, it is best not to plow again after soil disinfection, even if ploughing should be limited. At a depth of 10 cm. Otherwise, the bacteria in the soil below will be turned over again and re-contamination will occur. High temperature suffocation can greatly reduce the density of bacteria in the field and greatly reduce the chance of crop disease. For the greenhouse with root-knot nematodes, when using the base fertilizer after the shack, the avermectin organic fertilizer or the eucalyptus organic fertilizer 400 kg per acre can be used to basically eliminate the damage of the root-knot nematode.