In the spring, various crops enter an accelerated growth phase. This period is a key period for spraying foliar fertilizer. The preparation method of some foliar fertilizer is introduced.
The urea solution is usually used at a concentration of 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 a foliar fertilizer.
The urine washing solution has two functions of supplying nitrogen and killing cockroaches. Remove 0.5 to 1 kg of urea, add 100 kg of water, and dissolve it into 70-100 g of washing powder. With the spray, it can not be placed for a long time.
Biogas slurry dilution The biogas slurry is rich in available nitrogen, which is easily absorbed by the leaves and has a quick fertilizer effect. Take 10 kg of filtered biogas slurry and apply 100 kg of water. Use immediately after dispensing to avoid nitrogen volatilization.
Potassium dihydrogen phosphate solution 300 g of potassium dihydrogen phosphate plus water 100 kg spray.
Potassium sulfate solution is usually used at a concentration of 1% to 1.5%, and potassium chloride is added to 1 to 1.5 kg in 100 kg of water.
Grass ash leaching solution Take fresh grass ash 5-7 kg, add water 100 kg, stir for 14 hours, take the clear liquid spray.
The superphosphate leaching solution has the effect of supplementing phosphorus and controlling cotton pests. Take 2 to 3 kg of calcium phosphate, add 100 kg of water and stir well. After standing for 24 hours, filter and remove the filtrate.
Nitrogen, phosphorus and potassium mixed solution Prepare 100 kg of calcium perphosphate leaching solution with a concentration of 2% to 3%, then add 0.3 to 0.5 kg of urea and 1 to 1.5 kg of potassium sulfate.
Ferrous sulfate solution Take 200-300 grams of ferrous sulfate and add 100 kg of water. Because the iron fertilizer has poor fluidity in the blade, it should be sprayed several times, sprayed and sprayed finely, and the front and back of the blade should be sprayed. It is better to add 50-70 grams of washing powder to 100 kg of iron fertilizer aqueous solution.
Rare earth micro-fertilizer aqueous solution Foliar spray can increase chlorophyll content and enhance photosynthesis. The spray concentration is 0.08% to 0.1%. Add 80-100 ml of rare earth micro-fertilizer per 100 kg of water.
Zinc Sulfate Solution Take 100-200 g of zinc sulfate and add 100 kg of water. If a small amount of lime water is added to the prepared zinc sulfate aqueous solution, the effect of spraying the zinc fertilizer can be improved.
Borax solution Take 200 to 300 grams of borax and add 100 kg of water. Because borax dissolves slowly in cold water, it can be dissolved in 4~5 kg of 45 °C warm water, then add water 95-96 kg.
Manganese sulfate solution Take 50-100 g of manganese sulfate and add 100 kg of water to spray.
Ammonium molybdate solution Take 50-100 g of ammonium molybdate and add 100 kg of leaf spray.
Author: full Chang Wei
Source: Jiangsu Agricultural Science and Technology News
The urea solution is usually used at a concentration of 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 a foliar fertilizer.
The urine washing solution has two functions of supplying nitrogen and killing cockroaches. Remove 0.5 to 1 kg of urea, add 100 kg of water, and dissolve it into 70-100 g of washing powder. With the spray, it can not be placed for a long time.
Biogas slurry dilution The biogas slurry is rich in available nitrogen, which is easily absorbed by the leaves and has a quick fertilizer effect. Take 10 kg of filtered biogas slurry and apply 100 kg of water. Use immediately after dispensing to avoid nitrogen volatilization.
Potassium dihydrogen phosphate solution 300 g of potassium dihydrogen phosphate plus water 100 kg spray.
Potassium sulfate solution is usually used at a concentration of 1% to 1.5%, and potassium chloride is added to 1 to 1.5 kg in 100 kg of water.
Grass ash leaching solution Take fresh grass ash 5-7 kg, add water 100 kg, stir for 14 hours, take the clear liquid spray.
The superphosphate leaching solution has the effect of supplementing phosphorus and controlling cotton pests. Take 2 to 3 kg of calcium phosphate, add 100 kg of water and stir well. After standing for 24 hours, filter and remove the filtrate.
Nitrogen, phosphorus and potassium mixed solution Prepare 100 kg of calcium perphosphate leaching solution with a concentration of 2% to 3%, then add 0.3 to 0.5 kg of urea and 1 to 1.5 kg of potassium sulfate.
Ferrous sulfate solution Take 200-300 grams of ferrous sulfate and add 100 kg of water. Because the iron fertilizer has poor fluidity in the blade, it should be sprayed several times, sprayed and sprayed finely, and the front and back of the blade should be sprayed. It is better to add 50-70 grams of washing powder to 100 kg of iron fertilizer aqueous solution.
Rare earth micro-fertilizer aqueous solution Foliar spray can increase chlorophyll content and enhance photosynthesis. The spray concentration is 0.08% to 0.1%. Add 80-100 ml of rare earth micro-fertilizer per 100 kg of water.
Zinc Sulfate Solution Take 100-200 g of zinc sulfate and add 100 kg of water. If a small amount of lime water is added to the prepared zinc sulfate aqueous solution, the effect of spraying the zinc fertilizer can be improved.
Borax solution Take 200 to 300 grams of borax and add 100 kg of water. Because borax dissolves slowly in cold water, it can be dissolved in 4~5 kg of 45 °C warm water, then add water 95-96 kg.
Manganese sulfate solution Take 50-100 g of manganese sulfate and add 100 kg of water to spray.
Ammonium molybdate solution Take 50-100 g of ammonium molybdate and add 100 kg of leaf spray.
Author: full Chang Wei
Source: Jiangsu Agricultural Science and Technology News
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