What is the usual concentration for foliar fertilization? Understand it in one article
Which fertilizers can be used for foliar fertilization? What concentration is suitable? Experienced netizens are also asked to help introduce the fertilizers often used for crop foliar spraying (root-outside topdressing), including manganese sulfate, zinc sulfate, rice vinegar, ammonium molybdate, potassium dihydrogen phosphate, urea, copper sulfate, plant ash, superphosphate and borax. The above fertilizers used as...
Which fertilizers can be used for foliar fertilization? What concentration is suitable? Experienced netizens are also asked to help introduceThe fertilizers often used for crop foliar spraying (root-outside topdressing) include manganese sulfate, zinc sulfate, rice vinegar, ammonium molybdate, potassium dihydrogen phosphate, urea, copper sulfate, plant ash, superphosphate and borax. Used as foliar fertilization, the above fertilizers can quickly supplement nutrients for crops, relieve physiological diseases that appear in crops due to lack of nutrient elements, promote healthy crop growth, and increase yield.
Therefore, Zhongdi Web has compiled the optimal concentrations of the above fertilizers for foliar fertilization, and they are listed in detail below for netizens' reference.
Manganese sulfate: the optimal solution for foliar fertilization is 0.05%-0.l%.
Zinc sulfate: a small amount of lime liquid can be added to the solution before spraying, and the optimal spraying concentration is 0.l%-0.2%.
Rice vinegar: 200-250 milliliters of rice vinegar is mixed with 40-50 kilograms of water to spray crops.
Ammonium molybdate: suitable for foliar spraying of legume crops, with an optimal concentration of 0.05-0.1%,.
Potassium dihydrogen phosphate: the optimal concentration for crop foliar spraying is 0.3%; spray after the fertilizer is fully dissolved.
Urea: the optimal concentration for foliar spraying with urea is 1%-2%. When using it, be very careful: if the biuret content in urea exceeds 1.5%, it has a toxic effect on crops. Therefore, the biuret content must not exceed 1.5%.
Copper sulfate: the optimal concentration for crop foliar spraying is 0.02%-0.05%. When using it, add a small amount of lime liquid to the solution to avoid toxicity.
Plant ash: the usual concentration is 5%-7%. It must be prepared by adding water to plant ash, letting it stand with the water for 15 hours, filtering, and then spraying.
Superphosphate: the optimal concentration for crop foliar spraying is 2%. When using it, add water to the superphosphate, stir thoroughly, let it stand for 24 hours, filter, and then take the clear liquid for spraying.
Borax (or boric acid): the optimal concentration for crop foliar spraying is 0.2%-0.3%. For borax, you can first dissolve the borax with a small amount of 45°C hot water, then dilute it with water.
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