Foliar topdressing is a fertilization method often used in production. The fertilizer suitable for peanut leaf surface application and its application method are:
1. Urea in the middle and late stages of peanut growth, if the plant has a phenomenon of de-fertilization, or continuous rainfall in the growing season of peanuts causes water accumulation in the field and difficulty in root fertilizer absorption, it can be sprayed with 1% urea solution, spraying 60 kg per acre. .
2. Superphosphate calcium peanut leaves have strong absorption capacity of phosphorus. In the middle and late growth stage, 2% to 3% calcium perphosphate leaching solution is sprayed every 7 to 10 days, even spraying 2 to 3 times, per acre. Each spray of about 60 kg can speed up the operation of photosynthetic products to the pods, generally increasing yield by 7% to 10%.
3. Potassium dihydrogen phosphate Potassium dihydrogen phosphate is a kind of phosphorus and potassium binary compound fertilizer. It can be sprayed on peanuts and can increase yield by 18.2%~26.9%. Application method: 150-200 g of potassium dihydrogen phosphate per acre, 50 kg of water, sprayed in the evening or cloudy afternoon after being fully dissolved, preferably sprayed 3 times, every 7 days; if sprayed 8 In case of rain in the hour, re-spray once.
4. Potassium fertilizer is sprayed with 5% to 10% of ash ash leaching solution or 2% potassium sulphate (or potassium chloride) solution, spraying 60 kg per acre.
5. For each ton of dry matter formed by iron and fat peanuts, it is necessary to absorb 264 grams of iron and apply iron fertilizer on iron-deficient soil, generally increasing production by more than 10%. Application method: Spraying 0.2% ferrous sulfate solution every 5 to 6 days in the flowering stage, pod-forming stage or the phenomenon of iron deficiency in the plant, spraying continuously for 2 to 3 times.
6. For each ton of dry matter formed by boron fertilizer, it is necessary to absorb 44 grams of boron, and apply boron fertilizer on the boron-deficient soil, generally increasing yield by 7.8% to 22.5%. Application method: Foliar application of 0.2% borax or boric acid solution in peanut seedling stage, initial flowering stage and full flowering stage.
7. Manganese-fertilized peanuts need to absorb 39 grams of manganese per ton of dry matter, and manganese fertilizer is applied to manganese-deficient soils, generally increasing yield by 8% to 11%. Application method: starting from 30 to 50 days after sowing of peanuts, 15 to 20 days before harvesting, spraying with 0.1% manganese sulfate solution every 10 to 14 days; if necessary, it can be used as a fungicide for controlling peanut leaf spot Mixed application.
8. Molybdenum fertilizers need to absorb 1.32 grams of molybdenum per ton of dry matter, and apply molybdenum fertilizer on molybdenum-deficient soil, which can increase yield by 11.39%. Application method: Foliar application of 0.1% to 0.2% ammonium molybdate solution in peanut seedling stage and flowering stage.
9. Rare earth micro-fertilizer Rare earth micro-fertilizer, also known as rare earth nitrate, is a new type of rare earth element fertilizer that was firstly promoted and promoted in China. It is applied on peanuts and generally increases yield by 9.5% to 14.1%. Application method: 40 grams of rare earth micro-fertilizer per acre, 50 kilograms of water, sprayed on the leaf surface at the beginning of flowering.
This article URL: Peanut high-yield small tips: foliar topdressing types and precautions
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