Peanut Foliar Spray Fertilizer Yield Increase Technology

Foliar topdressing is a fertilization method often used in peanut 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-absorbing, it can be sprayed with 1% urea solution, and spray 60 kg per acre.
2. Superphosphate. Peanut leaves have a strong ability to absorb phosphorus. In the middle and late stages of growth, spray 2 to 3% of superphosphate leaching solution every 7 to 10 days, even spraying 2 to 3 times, spraying about 60 kg per acre. It can speed up the operation of photosynthetic products to pods, generally increasing yield by 7-10%.
3. Urea and superphosphate mixed spray. In the phosphate-deficient and nitrogen-deficient plots, 1 kg of urea mixed spray can be added to 100 kg of 2% superphosphate leaching solution, which saves labor and has good effect.
4. Potassium dihydrogen phosphate. Potassium dihydrogen phosphate is a phosphorus and potassium binary compound fertilizer, which can be sprayed on peanuts to increase yield by 18.2 to 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.
5, potash. Use 5-10% straw ash leaching solution or 2% potassium sulphate (or potassium chloride) solution to spray on the surface, spraying 60 kg per acre.
6, iron fertilizer. For every ton of dry matter formed by peanuts, it is necessary to absorb 264 grams of iron, and iron fertilizer is applied to the iron-deficient soil, which generally increases 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.
7, boron fertilizer. For every ton of dry matter formed by peanuts, 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.
8, manganese fertilizer. For each ton of dry matter formed by peanuts, it is necessary to absorb 39 grams of manganese, and manganese fertilizer is applied to the manganese-deficient soil, which generally increases yield by 8-11%. 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.
9, molybdenum fertilizer. For every ton of dry matter formed by peanuts, 1.32 grams of molybdenum needs to be absorbed, and molybdenum fertilizer is applied to the 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.
10. Rare earth micro-fertilizer. Rare earth micro-fertilizer, also known as rare earth nitrate, is applied on peanuts, generally increasing 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.
Huaxian Agricultural Technology Promotion Center Lu Shuguang

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