How to Overcome Bottleneck of Continuous Vegetable Obstruction in Facilities Facilities - Sterilization
First, cyanamide calcium soil disinfection
The principle of disinfecting calcium cyanamide (also known as lime nitrogen) refers to the fact that cyanamide and calcium cyanoaminated water generate dicyandiamide and liquid dicyandiamide have broad spectrum of harmful organisms such as fungi and bacteria in soil. The killing effect can prevent and control a variety of soil-borne diseases and underground pests, and it also has a certain control effect against root-knot nematodes that have been plagued by agricultural facilities. Calcium cyanamide is an efficient soil disinfectant. In addition to lime, the dicyandiamide and dicyandiamide of the decomposed intermediate product eventually generate urea, which has the advantages of no residue and no pollution to the environment. The prominent role of calcium cyanamide disinfectant technology is to promote the decomposition of organic matter, improve soil structure, regulate soil acidity, eliminate soil compaction, increase soil permeability, reduce the harm of diseases and weeds, and reduce the content of nitrite in vegetables.
The use of calcium cyanamide disinfectant technology is as follows: Before the dipping vegetables are poured 5 to 7 days before the digging, the water is poured, and when the soil is not sticky, the digging will be carried out, and 30-60 kg/mu (60-80 kg/mu can be prevented and treated immediately). The root-knot nematode calcium cyanide is evenly applied to the surface of the soil, and the soil is rotatively cultivated so that the calcium cyanamide can be uniformly mixed with the soil surface by 10 centimeters. The water is poured once again to cover the mulching film and the high temperature dwells for 7 to 15 days. Remove the plastic film, release air for 7 to 10 days, and check whether the seedlings can be normally emerged before planting. If they can emerge, they can be planted. In addition, the incompletely decomposed farmyard manure or crop stalks such as wheat straw, wheat husks, rice straw, corn stalks, etc., can also be sprinkled on the surface of the soil evenly before sowing. The precautions are that the operator must not drink alcohol within 24 hours before and after using calcium cyanamide and use it under the guidance of a professional.
Second, hot and humid sterilization
By using this method, various nematodes, harmful fungi and bacteria in the soil can be effectively killed, and the problem of dead seedlings of heavy-vegetable vegetables can be solved. Specific methods: After the winter and spring vegetables are pulled, 100 kg of quicklime powder per acre, 10 to 15 squares of chicken or other livestock and poultry excrement, 3,000 kg of plant straw, and microbial multi-dimensional bacteria (Shijiazhuang Greerin Bioengineering Institute of Technology) 8 kg; sprayed with Medina Activator (Hebei Cihang Technology Co., Ltd.) 400 ml. Rotate the plow to plow again to stir the straw, livestock and poultry manure, and bacteria. Then plunge the soil 30 cm deep, pour the water, cover it with a plastic film, and hold the film tightly for about a month. Remove the plastic film and farmland again. Barely airing for a week can kill bacteria and activate soil. The hot and humid sterilization method has obvious control effect on soil-borne diseases caused by heavy vegetable cropping. Among them, it is the best for controlling cucumber root rot and root knot nematode diseases that are most harmful to cucumbers. When the cucumbers were pulled, the control effect was achieved. 87.03% and 99.6%, that is, the heat and heat sterilization method solves the two biggest problems of severe dead cucumber and nematode disease caused by root rot. There is also a significant effect on grafting bacterial rot disease, and the control effect is 59.6%. The average increase rate of the treatment in the test was 36% compared with the control. This measure has low cost, simple method, easy operation for farmers, and is suitable for large-scale promotion in the vegetable area of ​​the facility. (Provincial Agricultural Technology Extension Station)
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