Due to the complexity of soil types and the variety of crops, the phenomenon of lack of trace elements in various regions exists to varying degrees. In production, the use of foliar spray, soil topdressing and mixing (leaching) to topically apply trace fertilizers can alleviate the lack of trace elements. The demand for trace elements in crops is minimal, and farmers’ friends should pay special attention to the application concentration of trace fertilizers when applying micronutrients.
Boron fertilizer mainly contains borax and boric acid, followed by boron and magnesium. Borax, boric acid is a commonly used boron fertilizer, topdressing 0.5 to 0.75 kg per mu of soil, foliar spray concentration of 0.1% to 0.3%, soaking concentration of 0.01 to 0.1%, seed dressing fertilizer per kg of 0.2 to 0.5 grams.
Zinc fertilizer is mainly zinc sulfate, zinc oxide, zinc chloride, and chelated zinc. Zinc sulfate is commonly used zinc fertilizer, soil topdressing 1 to 2 kg per mu, foliar spray concentration of 0.01 to 0.05%, soaking concentration of 0.02% to 0.05%, that is, 1 to 3 grams of fertilizer per kilogram of seed.
Molybdenum is mainly composed of ammonium molybdate, followed by molybdate and molybdenum trioxide. Ammonium molybdate is a commonly used molybdenum fertilizer, topdressing 50-150 grams per acre of soil, spraying a concentration of 0.01-0.1%, soaking in a concentration of 0.05%-0.1%, and seed dressing of 2-5 grams per kg of fertilizer.
Copper fertilizer mainly includes copper sulfate, copper oxide, chelated copper, and copper-containing slag. Copper sulphate is commonly used copper fertilizer, topdressing 0.8 to 1.5 kilograms per mu of soil, foliar spray concentration of 0.01% to 0.05%, seed soaking concentration of 0.01% to 0.05%, and seed dressing of 0.3 g per kilogram of seed fertilizer.
Manganese fertilizer mainly includes manganese sulfate, followed by manganese carbonate, manganese chloride and manganese oxide. Manganese sulphate is commonly used manganese fertilizer, top-dressing 1 to 2 kilograms per acre soil, foliar spray concentration of 0.05% to 0.2%, soaking concentration of 0.05% to 0.1%, seed dressing per kilogram of seed fertilizer 4 to 8 grams.
Iron fertilizers mainly include ferrous sulfate, and ammonium ferrous sulfate, iron chelates, and the like. Ferrous sulphate is a common species, topdressing 5 kilograms per acre of soil, foliar spray concentration of 0.5% to 0.3%.
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