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(1) 1 kg of nitrogen fertilizer urea applied to the foliar surface, 100 kg of clear water is fully stirred and dissolved into 1% aqueous urea solution; if there is de-fermentation in the middle and late growth stages of peanuts, or continuous rainfall in the growing season of peanuts, water accumulated in the soil, and roots are difficult to absorb nutrients, ie It can be sprayed and sprayed with 60kg of urea aqueous solution per acre.
(2) Foliar application of phosphate fertilizer Peanut has strong absorption capacity for phosphorus, and spraying calcium phosphate aqueous solution in the middle and late growth period can increase pod yield. 2-3kg of superphosphate, 100kg of water, stir and soak, after a day and night, take the upper layer of clear liquid application, usually every 7-10 days spray, even spray 2-3 times, each time spray about 60kg per acre. Care should be taken to completely remove the residue so as not to damage the blade.
(3) Nitrogen and phosphorus are mixed in the peanut field with phosphorus deficiency and nitrogen deficiency. It can spray 1% urea and 2% calcium superphosphate mixture, which saves labor and has good effect. Preparation method: 100kg2% superphosphate Urea lkg is added to the calcium aqueous solution.
(4) Foliar application of potassium fertilizer is generally formulated with grass ash. The preparation method is to take 5-10kg of grass ash without rain, add 100kg of water and stir well, soak for 12-14 hours, take the clear liquid, which is 5%-10% of the ash leaching liquid, spray about 60kg per acre. Potassium sulphate or potassium chloride aqueous solution can also be used. The preparation method is to add 2kg of potassium sulphate or potassium chloride in 100kg of clean water, stir and dissolve to form 2% potassium sulphate or potassium chloride aqueous solution, and spray 60kg per acre. .
(5) For the combination of phosphorus and potassium, take 5kg of hay ash, add 40-50kg of water to soak, and take 2kg of calcium phosphate. Sprinkle in the soaking solution, stir well, filter out the clear liquid after half a day, and add the remaining water for 20k. Then, the filtrate is combined twice, and the water is added to 100 kg, that is, potassium dihydrogen phosphate produced by the earth method, and 60 kg per acre is sprayed, and the spraying effect is obvious when the spray is performed twice.
(6) Attention to the problem
1. According to the growth of peanuts and the growth period to determine the time of fertilization, generally should be applied in the late growth stage.
2. It is necessary to choose no windy cloudy days, or spray on the sunny day before 9:00 am and after 4 pm to increase the amount of leaf absorption and prevent damage to the leaves. After 4 hours of spraying, it should be sprayed after the rain.
3. Strictly control the concentration of spraying, the concentration is large and easy to damage the leaves, causing fat damage.
4. Spray evenly when spraying, and spray the front and back of the leaves.
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