Practice has proved that crop foliar fertilizer (root top dressing) can quickly replenish nutrients, relieve crops from physiological diseases caused by lack of nutrients, promote crop growth and increase yield. The following describes the use concentration of foliar fertilizer:
Potassium dihydrogen phosphate. The usual concentration is 0.3%. Method: 100 g of water was added with 300 g of potassium dihydrogen phosphate, fully dissolved and sprayed.
Urea. Commonly used concentrations are 1% - 2%. When using it, it is important to note that if the content of diuretic in urea exceeds 1.5%, it will be toxic to crops. Therefore, foliar spray cannot be performed.
plant ash. The commonly used concentration is 5%-7%. It must be used for the preparation of grass ash and water, and it is allowed to stand for 15 hours after filtration and sprayed.
Superphosphate. The concentration was 2%, and the superphosphate was added with water and stirred well. After standing for 24 hours, the mixture was filtered, and the supernatant was sprayed.
Boron breaking (or boric acid) is usually used in a concentration of 0.2% to 0.3%. Method: First dissolve the borax with a small amount of hot water at 45 ° C, and then dilute with water.
Paclobutrazol. The fruit trees were sprayed with a solution of 1000-1500×10^-6, and the crops were sprayed with a 50×10^-6 solution.
Copper sulfate. Commonly used concentration is 0.02%-0.05%. When used, a small amount of lime liquid is added to the solution to avoid poisoning.
Manganese sulfate. Commonly used concentration is 0.05%-0. L%.
Zinc sulfate. The commonly used concentration is 0. L% - 0.2%, spray a small amount of lime solution in the solution.
Rice vinegar. Spray with 50-50-50 kg of water with 200-250 ml.
Ammonium molybdate. The legume crops are sprayed at a usual concentration of 0.05-0.1%.
Potassium dihydrogen phosphate. The usual concentration is 0.3%. Method: 100 g of water was added with 300 g of potassium dihydrogen phosphate, fully dissolved and sprayed.
Urea. Commonly used concentrations are 1% - 2%. When using it, it is important to note that if the content of diuretic in urea exceeds 1.5%, it will be toxic to crops. Therefore, foliar spray cannot be performed.
plant ash. The commonly used concentration is 5%-7%. It must be used for the preparation of grass ash and water, and it is allowed to stand for 15 hours after filtration and sprayed.
Superphosphate. The concentration was 2%, and the superphosphate was added with water and stirred well. After standing for 24 hours, the mixture was filtered, and the supernatant was sprayed.
Boron breaking (or boric acid) is usually used in a concentration of 0.2% to 0.3%. Method: First dissolve the borax with a small amount of hot water at 45 ° C, and then dilute with water.
Paclobutrazol. The fruit trees were sprayed with a solution of 1000-1500×10^-6, and the crops were sprayed with a 50×10^-6 solution.
Copper sulfate. Commonly used concentration is 0.02%-0.05%. When used, a small amount of lime liquid is added to the solution to avoid poisoning.
Manganese sulfate. Commonly used concentration is 0.05%-0. L%.
Zinc sulfate. The commonly used concentration is 0. L% - 0.2%, spray a small amount of lime solution in the solution.
Rice vinegar. Spray with 50-50-50 kg of water with 200-250 ml.
Ammonium molybdate. The legume crops are sprayed at a usual concentration of 0.05-0.1%.
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