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Commonly used foliar fertilizer preparation method
In spring, various crops enter the accelerated growth stage. This period is the critical period for spraying foliar fertilizers. Now we introduce the preparation method of some foliar fertilizers. The usual concentration of urea solution is 0.5% to 1%, that is, 0.5 to 1 kg of urea plus 100 kg of water. Urea with a biuret content of more than 1.5% cannot be used as foliar fertilizer. The urine washing mixture solution has two functions of supplying nitrogen and eliminating cesium. To urea 0.5 to 1 kg, add water, 100 kg of water, and then dissolved into the detergent 70 to 100 grams. With the spray with the distribution can not be put for a long time. Biogas Diluent Biogas slurry is rich in available nitrogen, which is easily absorbed by the leaves. Take 10 kg of filtered biogas slurry and apply 100 kg of water. Immediately after use to avoid nitrogen evaporation. Potassium dihydrogen phosphate solution 300 g potassium dihydrogen phosphate plus 100 kg of water sprayed. Potassium sulphate solution commonly used concentration 1% ~ 1.5%, 100 kg of water by adding potassium sulfate 1 ~ 1.5 kg. The plant ash leaching solution takes fresh grass ash 5 to 7 kg, adds 100 kg of water, and mixes for 14 hours. The superphosphate leachate has the effect of supplementing phosphorus and controlling cotton pests. Take two to three kilograms of calcium phosphate, add 100 kilograms of water and stir well, place it for 24 hours, filter, and spray the filtrate. Nitrogen, phosphorus and potassium mixed solution preparation 2% to 3% concentration of superphosphate calcium leachate 100 kilograms, then add urea 0.3 to 0.5 kilograms and potassium sulfate 1 to 1.5 kilograms. The ferrous sulfate solution takes 200-300 g of ferrous sulfate and adds 100 kg of water. Due to the poor fluidity of iron fertilizer in the leaves, it should be sprayed several times, sprayed evenly and finely sprayed. The front and back of the blade should be sprayed. It is better to add 50-70 grams of detergent to 100 kg of iron fertilizer solution. Rare earth micro-fertilizer solution foliar spray can increase chlorophyll content and enhance photosynthesis. The spraying concentration was 0.08% to 0.1%. Add 80 to 100 ml of Rare Earth Micro Fertilizer per 100 kg of water. Zinc sulfate solution to take 100 to 200 grams of zinc sulfate, add 100 kg of water. If a small amount of lime water is added to the prepared zinc sulfate aqueous solution, the zinc fertilizer spraying effect can be improved. Borax solution to take 200 to 300 grams of borax, add water 100 kg. Due to the slow dissolution of borax in cold water, it can be dissolved with 4 to 5 kg of 45°C warm water and then added with 95-96 kg of water. Manganese sulfate solution to take 50 to 100 grams of manganese sulfate, add water 100 kg spray. Ammonium molybdate solution to take 50 to 100 grams of ammonium molybdate, add 100 kg of foliar spray.