In addition, in the winter greenhouse vegetable exchange, the farmers are reminded that the vegetable farmers do not plan to save time and lay hidden dangers in the later stages. It is recommended that the vegetable growers pay attention to the following points when changing vegetables in winter greenhouses: 1. To deepen the soil and improve Due to the growth of the vegetables in the soil, the soil in the shed has become hardened due to watering and operation, and the air permeability has become poor. If the soil is not deep-turned, it will directly affect the rooting and rooting of the sorghum crop. In addition, the temperature rise is also slow. Second, the soil treatment, to reduce the occurrence of soil-borne diseases after the growth of the cultivation of vegetables on the top, the soil has accumulated a large number of bacteria, eggs, will cause the infection of the squat vegetables, if not the soil treatment will increase The chance of a big squat crop. It is recommended that in the selection of low-temperature fumigant dregs, at the same time when dipping deep into the soil, diclafen or potassium permanganate is thrown into the ground to prevent soil-borne diseases; it is also possible to place thiazophos or avermectin at the time of planting the crop. Crops rhizosphere, control nematode damage. Third, reasonable fertilization, prevention and control of burning roots and smoked seedlings in winter greenhouse ventilation time is small, but also cover the film, if the vegetable farmer in the preparation of such as unfamed manure, manure in the decomposition process of harmful gases cannot spread out, roots and close Damaged crop leaves at the place where the film is damaged are extremely vulnerable, resulting in burning roots and smoked seedlings. It is recommended that growers deepen the soil by applying a completely decomposed manure or commodity organic fertilizer. Fire Stick,Red Fire Extinguisher,Vehicle Fire Extinguisher,Aerosol Extinguishing DONGGUAN TENYU TECH.INC , https://www.tenyutech.com