The scientific application of trace element fertilizer has an important effect on the growth of peanut. The application methods of commonly used trace elements in peanut fields are as follows:
Molybdenum fertilizer: The commonly used molybdenum fertilizer is ammonium molybdate. The application methods are seed soaking, seed dressing and spraying. When soaking seeds, the concentration is generally 0.1% to 0.2%, that is, 10 to 20 grams of ammonium molybdate is placed in warm water at 40 ° C, and then formulated into an aqueous solution of 0.1% to 0.2%, soaking the seeds for 3 to 5 hours. After drying out, you can sow. When seed dressing, 10 to 20 grams of ammonium molybdate is formulated into 0.2% to 0.3% aqueous solution, sprayed directly on the seed with a sprayer (1 mu of ground for seed amount), while spraying and mixing, strive to be uniform, dry and sow . For spraying, 10-15 g of ammonium molybdate is dissolved in 30 kg of water and sprayed on the plants at the initial flowering stage.
Boron fertilizer: mainly boric acid, borax, etc., the residue of boric acid and boron ore can also be used as boron fertilizer. Because of the low demand for boron in peanuts, it is very economical to use for seed dressing or soaking. Its suitable concentration is 0.01%. Foliar spray application with 0.05% aqueous boric acid solution is also effective.
Rare earth: Seed dressing is the main method for the application of rare earth in peanuts. The method is to mix 0.5 kg of peanut seeds with 1 to 2 g of rare earth nitrate. Spraying is best carried out by spraying 0.1% rare earth solution in the four-leaf stage and spraying 0.03%-0.5% rare earth solution in the initial flowering stage. According to the principle that rare earth can promote the absorption of phosphate fertilizer, it can be combined with the application of phosphate fertilizer to increase the yield increase effect.
Molybdenum fertilizer: The commonly used molybdenum fertilizer is ammonium molybdate. The application methods are seed soaking, seed dressing and spraying. When soaking seeds, the concentration is generally 0.1% to 0.2%, that is, 10 to 20 grams of ammonium molybdate is placed in warm water at 40 ° C, and then formulated into an aqueous solution of 0.1% to 0.2%, soaking the seeds for 3 to 5 hours. After drying out, you can sow. When seed dressing, 10 to 20 grams of ammonium molybdate is formulated into 0.2% to 0.3% aqueous solution, sprayed directly on the seed with a sprayer (1 mu of ground for seed amount), while spraying and mixing, strive to be uniform, dry and sow . For spraying, 10-15 g of ammonium molybdate is dissolved in 30 kg of water and sprayed on the plants at the initial flowering stage.
Boron fertilizer: mainly boric acid, borax, etc., the residue of boric acid and boron ore can also be used as boron fertilizer. Because of the low demand for boron in peanuts, it is very economical to use for seed dressing or soaking. Its suitable concentration is 0.01%. Foliar spray application with 0.05% aqueous boric acid solution is also effective.
Rare earth: Seed dressing is the main method for the application of rare earth in peanuts. The method is to mix 0.5 kg of peanut seeds with 1 to 2 g of rare earth nitrate. Spraying is best carried out by spraying 0.1% rare earth solution in the four-leaf stage and spraying 0.03%-0.5% rare earth solution in the initial flowering stage. According to the principle that rare earth can promote the absorption of phosphate fertilizer, it can be combined with the application of phosphate fertilizer to increase the yield increase effect.
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