Common preparation methods of foliar fertilizer

In spring, all kinds of crops enter the stage of accelerating growth. This period is the key period for spraying foliar fertilizer. This paper introduces the preparation methods of some foliar fertilizers. The common concentration of urea solution is 0.5%-1%, that is, adding 100 kg of water with 0.5-1 kg of urea. Urea with biuret content more than 1.5% cannot be used as foliar fertilizer. The solution of urine washing mixture has two effects of supplying nitrogen and killing aphids. Remove 0.5 kilogram of urea, add 100 kilograms of water, and then dissolve into the washing powder 70 kilograms 100 grams. Match with spray, not for a long time after matching. Biogas liquid dilution liquid biogas liquid is rich in available nitrogen, which is easy to be absorbed by leaves and has fast fertilizer effect. Take 10 kg of filtered biogas slurry and spray it with 100 kg of water. Use immediately after matching to avoid nitrogen volatilization. Potassium dihydrogen phosphate solution 300g potassium dihydrogen phosphate plus water 100kg spray. The common concentration of potassium sulfate solution is 1% 1.5%. 100 kg of water is added to 1% 1.5 kg of potassium sulfate. The plant ash leaching solution takes 5kg of fresh plant ash, add 100kg of water, stir and place for 14 hours, then spray the clarification solution. The leaching solution of calcium superphosphate can supplement phosphorus and control cotton pests. Take 2-3 kg of calcium superphosphate, add 100 kg of water, stir fully, filter after 24 hours, and remove the filtrate spray. The mixed solution of nitrogen, phosphorus and potassium is used to prepare 100 kg of superphosphate solution with a concentration of 2% to 3%, and then 0.3 kg 0.5 kg of urea and 1.5 kg of potassium sulfate are added. Ferrous sulfate solution to take ferrous sulfate 200kg 300g, add 100 kg of water. Due to the poor mobility of iron fertilizer in the leaves, it should be sprayed several times, and spray evenly, spray fine, the front and back of the leaves should be sprayed. The effect of adding 50-70 grams of washing powder to 100 kg iron fertilizer solution is better. Foliar spraying of rare earth micro-fertilizer solution can increase the content of chlorophyll and enhance photosynthesis. The concentration of spray is 0.08%-0.1%. Add 80ml of rare earth micro-fertilizer to every 100 kg of water. Take 100g zinc sulfate solution to 200g zinc sulfate and add 100kg water. If a small amount of lime water is added to the prepared zinc sulfate solution, the spraying effect of zinc fertilizer can be improved. Take 200 kilograms of borax solution with 300 grams of borax and 100 kilograms of water. Because borax dissolves slowly in cold water, it can be dissolved in 45 ℃ warm water of 4 kilograms and then added with 95 kilograms of water. Take 50 grams of manganese sulfate from manganese sulfate solution and spray 100 kilograms of water. Ammonium molybdate solution take 50 kilograms of ammonium molybdate, add water 100 kilograms foliar spray.