At present, the production of fruits and vegetables in our country's protected areas is developing toward pollution-free, green and organic agriculture. High-temperature stuffy shed measures are not only an important measure for pollution-free agriculture, but also an important part of ecological agricultural measures. High temperature stuffy shed mainly has four advantages: First, it is conducive to killing germs and insects. According to experiments and practices, the greenhouse temperature can reach 50°C to 60°C for 5 to 7 days at noon in 3 to 4 hours. The bacteria and insect sources in the greenhouse can be reduced by 60% to 80%, and can be reduced by more than 90% at 60°C or above. If it is supplemented with anti-biological measures, the effect will reach more than 98%. Second, it will help improve organic fertilizer efficiency. In order to improve the harmlessness and standardization of cultivation, a large number of vegetable growers and fruit growers increased the use of organic manure, such as chicken manure and cattle manure, through high-temperature stuffy sheds, which can be beneficial to the post-combustion of organic manure. Third, it is beneficial to improve the efficacy and no residue. By applying appropriate low-toxic, low-residue, fast-dissolving, and volatile-type pesticides in leisure booths, the amount of pesticides can be increased in an appropriate amount, the efficacy can be improved, and the effects of high-temperature and high-light can be fully utilized, reducing the residual period of pesticides. , To achieve the effect of harmless to the crop and not remaining. Fourth, it is conducive to raising land and fertilizing the soil. Combining the increased use of organic manure and straw, and scientifically applying a certain amount of fermented bacterial fertilizer, can greatly improve the soil structure, enrich the aggregate structure, reduce compaction, and reduce or delay the degree of salinization.
High-temperature stuffy sheds mainly focus on three measures:
1. Close the booth and repair the shed film. Confining the greenhouse to improve the temperature of the greenhouse is the key to improving the effectiveness of the greenhouse. Therefore, the work of sealing, repairing and cleaning the shed film must be done before the drapery. It is necessary to carefully inspect the shed face, seal all bad ones with tape, and use a sprayer to clean the surface of the shed film membrane. You can also use the rain to wash the outer membrane surface of the shed. Such as using a new film to warm up better. When the sheds are dungy, the sheds must be sealed tightly to increase the effect and prevent the children from entering and causing injury.
2. Irrigation wet stuffy, double film coverage. First deep-turn 20 to 30 centimeters, turn the germs and insect sources to the surface, and then irrigate the water, so that the relative humidity in the field reaches more than 85%, and cover the film in the shed, so that high temperature and humidity can make the temperature of the shed reach above 60°C. Soil temperatures above 55°C can kill more than 95% of pathogens, blight, aphids, whiteflies and other pathogens, killing more than 40% of root-knot nematodes.
3. Scientific drugs, fertilizers and applied. It is the best time to prevent and control pests and diseases by applying no pesticide in the shed indoors. Combine the effect of the boring shed with up to 99%. It can be applied in the afternoon or in the morning before the drowsy, with low-toxic low-residue pesticides such as phoxim, which is easily photolyzed, and volatile dichlorvos, sprayed on 800-1000 times liquid in the shed and on the slope. Every 7 to 10 days, then about 10 centimeters from the ground, and the second time, spray the herbs again. Can also be applied carbendazim, chlorothalonil WP and other fungicides to prevent diseases. At the same time, manure can be applied early in the shed, fertilizer and stuffy. The organic fertilizer is matured in advance and evenly applied into the shed, and then the pesticide and fungicides are sprayed and spread on the surface of the manure and the soil, combined with fertilization, application of pesticide, arable land, and ditching, so that the manure can be received and promoted. , improve fertility, enhance efficacy and other effects in one fell swoop. It is also possible to apply appropriate amounts of biological fertilizers or starters to livestock manure and straw fertilizers to improve the soil and improve fertilizer efficiency.
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