Fertilizers and pesticides are mixed in solid and liquid formulations. The former is to directly mix the solid fertilizer with the solid pesticide, or spray the liquid pesticide on the solid fertilizer, or add the pesticide into the fertilizer production to make a pellet. The latter is the mixing of solid or liquid pesticides into liquid fertilizers. In general, the provisions for the direct mixing of solid fertilizers with pesticides are not too strict; however, there are specific technical regulations for pesticide-mixed liquid fertilizers.
At present, pesticides mixed with fertilizers at home and abroad have the largest number of herbicides, followed by insecticides and fungicides.
1. Fertilizer and herbicide mixed application technology
The combined application of fertilizers and herbicides can influence each other. The use of herbicides and fertilizers is more evenly distributed than that used alone, which increases the lethal surface of weeds and improves efficacy. At the same time, some fertilizers can also promote the absorption of herbicides by plants. Nitrogen fertilizers can promote the absorption of herbicides by crops. According to the experiment, superphosphate and atrazine were used directly and mixed into the soil. They did not change their herbicidal activity, but they should not be stored long after mixing, otherwise the efficacy would be reduced. Another example is the combination of herbicides and trace element fertilizers.
At present, the United States recommends atrazine and trifluralin to combine field crops with fertilizers. There are five types of chemical fertilizers, most of which are liquid compound fertilizers. The ratio of nitrogen, phosphorus and potassium widely used is 3-10- 10, 4-11-11, 15-15-15 liquid compound fertilizer. The application of herbicides together with organic fertilizers tends to reduce the herbicidal effect. Herbicides and fertilizers are mixed in many ways, of which extra-root spray is a more effective method. Under normal circumstances, it is forbidden to use all kinds of herbicides on vegetables, and nuisance-free vegetables should be prohibited from use. Therefore, in the production of pollution-free vegetables, biological, physical, and other ecological weeding methods should be used as far as possible to ensure that the vegetables produced meet the AA- or A-level green food hygiene standards.
2. Fertilizers and pesticides mixed application technology At present, pesticides mixed with fertilizers are mainly used to control underground pests and insecticides that have a systemic effect, and do not affect each other after mixing. Trichlorfon, dichlorvos, phoxim and other low-toxicity, low-residue chemical pesticides or biopesticides, such as pyrethrum, tea dried, etc. are mixed with fertilizers for basal pests, such as the control of small weevil, crickets, crickets, etc., with tea. Withered 225-300 kg/ha, floured, added with water for 7 days, added 750 kg/ha of grass ash, and used basal fertilizer before sowing or planting vegetables to prevent and control underground pests. Low-toxicity specific insect growth regulators such as diflubenzuron, diflubenzuron, diflubenzuron, and buprofezin are formulated as aqueous solutions, with 0.5% superphosphate, 0.2% ammonium nitrate or urea, 0.2% The potassium dihydrogen phosphate is mixed and sprayed on vegetables, which has the dual effects of insecticidal and top dressing.
3. Fertilizers and fungicides mixed application technology There are many researches on the application of fertilizers and fungicides. However, there are few applications. According to reports, mancozeb and urea are mixed and sprayed with tomato to prevent disease and top dressing. Mancozeb, fenoxan, and thiram fungicides have the ability to inhibit nitrification. Fumei Shuang, Manson Manganese Zinc, Chlorothalonil, Carbendazim and other major prevention and treatment of tomato, melon early blight, blight, seedling damping-down disease, etc., can be used for seed and soil disinfection, and fertilizer, soil mix Evening nursery nutrition soil. Can kill (copper hydroxide), Nongli Ling (vinyl nucleus Lee) and other fungicides can be mixed with 0.2% of urea spray, both the effect of bactericidal nitrogen.
4. Fertilizers and Plant Growth Regulators Mixed Application Techniques There is relatively little research on the use of fertilizers and plant growth regulators, and there are few applications. According to reports, the combination of urea and liquid fertilizer can increase the efficacy and fertilizer efficiency. Increasing production spirit, ABT rooting powder, etc. can be mixed with urea and other fertilizers to spray or dip root.
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