Spraying technology of peanut foliar fertilizer

Foliar fertilization of peanut has a high absorption and utilization rate of fertilizer, saving fertilizer and increasing the yield. Foliar application of nitrogen fertilizer, peanut plant absorption and utilization rate of more than 55.5%, the number of fruit increased significantly, the economic coefficient increased significantly; foliar application of phosphate fertilizer, generally can increase yield by 7%-10%; foliar application of aluminum, boron, manganese, iron Such as micro-fertilizer, generally can increase production by 8%-10%. A large number of elements such as nitrogen, phosphorus, potassium and calcium, and trace elements such as molybdenum, boron, manganese and iron can be applied on the foliar surface.
(1) Applying nitrogen fertilizer on the foliar surface, weigh 1kg of urea, and fully agitate and dissolve 1% aqueous urea solution with 100kg of clear water; if there is de-fermentation in the middle and late growth stage of peanut, or continuous rainfall in the growing season of peanut, water in the soil, difficulty in absorbing nutrients in roots At the time, it can be sprayed, and 60 kg of urea aqueous solution can be sprayed per acre.
(II) Application of Phosphate Fertilizer on Foliar Peanuts have strong absorption capacity of phosphorus. Spraying 2%-3% aqueous solution of superphosphate in the middle and late growth stages can increase the rate of photosynthetic products to pods and increase the yield of pods. The specific method is: put 2-3kg of superphosphate in 100kg of clean water, stir and soak, after l night, take the upper layer of clear liquid application, generally every 7-10 days spray, even spray 2-3 times, each Spray about 60kg per acre. Be careful to remove the residue completely to avoid damage to 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. The preparation method of the mixture is: Urea lkg was added to 100 kg of 2% calcium superphosphate 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) Phosphorus and potassium are taken from 5 kg of hay wood ash, soaked with 40-50 kg of water, and 2 kg of calcium phosphate is taken at the same time. Sprinkle the human soaking solution, stir well, filter out the clear liquid after half a day, and soak the remaining water for 20 k. Filtration, and then combine the two times of the filtrate, the water to 100kg, that is, the potassium dihydrogen phosphate produced by the earth method, spraying 60kg per acre, and spraying 2 times has obvious effect of increasing yield.
(6) Problems in the attention of peanut leaf fertilization
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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