How to make foliar fertilizer? 15 simple methods shared
Foliar spraying, also called nutrient spraying outside the roots, is a fertilization measure that cannot be ignored in fruit tree production. This method saves labor and effort, and takes effect quickly with a high utilization rate; within 24 hours, 80% of the sprayed fertilizer can be absorbed. Spraying apple, pear, hawthorn and other fruit trees during the flowering period can increase the fruit-setting rate, and spraying the leaves and fruit during the growth period...
I. Urea solution: the commonly used concentration is 0.5%-1%, 0.5-1 kg of urea to 100 kg of clean water. If the content of the toxic substance biuret in urea exceeds 1.5%, it cannot be used as a foliar fertilizer.II. Urea-detergent mixture solution: it has two functions, supplying nitrogen and killing aphids. Weigh 0.5-1 kg of urea, add 100 kg of water, then dissolve in 70-100 g of washing powder. Mix and spray immediately; do not leave it standing for long after mixing.
III. Superphosphate extract: it has the effect of supplementing phosphorus and controlling cotton pests. Take 2-3 kg of high-quality powdered superphosphate, add 100 kg of water, stir thoroughly, leave it for 24 hours, then filter, and use the filtrate for foliar spraying.
IV. Potassium dihydrogen phosphate solution: 300 g of potassium dihydrogen phosphate to 100 kg of water for spraying.
V. Nitrogen-phosphorus-potassium mixed solution: prepare 100 kg of a 2%-3% superphosphate water extract, and add 0.3-0.5 kg of urea and 1-1.5 kg of potassium sulfate.
VI. Potassium sulfate solution: the commonly used concentration is 1%-1.5%; to 100 kg of water, add 1-1.5 kg of potassium sulfate.
VII. Plant ash extract: take 5-7 kg of fresh plant ash that has not been rained on, add 100 kg of clean water, stir, then leave it for 14 hours, and take the clear liquid for spraying.
VIII. Zinc sulfate solution: take 100-200 g of zinc sulfate, add 100 kg of water. If a small amount of lime water solution is added to the prepared zinc sulfate aqueous solution, the effect of foliar spraying of zinc fertilizer can be improved.
IX. Borax solution: take 200-300 g of borax to 100 kg of clean water. Because borax dissolves slowly in cold water, you can first dissolve it with 4-5 kg of warm water at 45°C, then add 95-96 kg of water.
X. Copper sulfate solution: to every 100 kg of clean water, add 30-50 g of copper sulfate. To avoid toxicity, a small amount of lime water can be added.
XI. Ferrous sulfate solution: take 200-300 g of ferrous sulfate to 100 kg of water. Because iron fertilizer has poor mobility in leaves, apply it several more times, and spray evenly and finely, covering both the front and back of the leaves. Adding 50-70 g of washing powder to 100 kg of iron fertilizer aqueous solution gives a better effect.
XII. Manganese sulfate solution: take 50-100 g of manganese sulfate to 100 kg of water for spraying.
XIII. Ammonium molybdate solution: take 50-100 g of ammonium molybdate, add 100 kg of water for foliar spraying.
XIV. Diluted biogas slurry: biogas slurry is rich in readily available nitrogen, is easily absorbed by leaves, and has a rapid fertilizer effect. Take 10 kg of filtered biogas slurry to 100 kg of water for spraying. Use it immediately after mixing to avoid nitrogen volatilization.
XV. Rare earth micro-fertilizer aqueous solution: foliar spraying can increase chlorophyll content and enhance photosynthesis. The spraying concentration range for crops and fruit trees is 0.08%-0.10%. To every 100 kg of clean water, add 80-100 ml of rare earth micro-fertilizer.