Spraying technology of summer peanut foliar fertilizer

1. Nitrogen fertilizer Urea is very important for peanut growth, especially if there is de-fermentation in the middle and late growth stages of peanuts, or continuous long-term rainfall in summer, it is very difficult to absorb nutrients in roots. If the supply of nutrients is insufficient, it will affect the yield and quality of peanuts. When the surface can be sprayed with urea, generally according to the ratio of urea and clean water 1:100, fully stirred and dissolved into 1% aqueous urea solution, spray 60 kg per acre.

2. Phosphate Fertilizer Peanut has a strong ability to absorb 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 and quality of pods. The specific method is to put 2 to 3 kg of superphosphate into 100 kg of clear water, stir for 1 day and night, then take the upper layer of clear liquid for application, generally every 7 to 10 days, once every 2 to 3 times. Every time, about 60 kg per mu, but it should be noted that the residue should be completely removed. On the one hand, it can avoid damage to the leaves, on the other hand, it can avoid blocking the pesticide spraying equipment.

3. Potassium fertilizer can be prepared by spraying the ash from the peasant's home. The preparation method is to take 5~10 kg of grass ash without rain, add 100 kg of water and stir well. After soaking for 12~14 hours, take it. The upper clear liquid, that is, 5%~10% of the ash leaching liquid, spray about 60 kg per acre; can also use potassium sulfate or potassium chloride aqueous solution, the preparation method is to add potassium sulfate or chlorination in 100 kg of clear water. Potassium 2 kg, stirred and dissolved to form a 2% potassium sulfate or potassium chloride aqueous solution.

4. Mixing and spraying in the peanut field with both phosphorus deficiency and nitrogen deficiency, it can spray 1% urea and 2% calcium superphosphate mixture. The preparation method of the mixture is added in 100 kg of 2% calcium superphosphate solution. Urea 1 kg, stir evenly, generally spray 60 kg per acre. In peanut fields that are both deficient in phosphorus and potassium, phosphorus and potassium can be combined. The specific method is to take 5 kg of hay ash, soak 40~50 kg of water, and take 2 kg of calcium phosphate and sprinkle it into the soaking solution. Stir well, filter out the supernatant after 12 hours, and add 20 kg of the remaining water to soak the filter, then combine the 2 times of the filtrate to 100 kg of water. Generally, spray 60 kg per acre, spray 2 There will be a significant increase in production.

When fertilizing peanut leaves, the concentration of application should be strictly controlled. The effect of low concentration is not obvious, and the concentration is high, which may damage the leaves and cause fat damage. Spray evenly when spraying, preferably the front and back sides of the leaves should be sprayed, which is more conducive to the absorption of peanut leaves.
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