Peanut fertilization technology

For every 100kg of pods produced, about 6.8kg of phosphorus, 1.3kg of potassium, 3.8kg of calcium, and 3kg of nitrogen should be absorbed. N: P2O5: K2O = 5: 1:3.
Peanut has a nitrogen fixation effect, but the root nodule can not fix nitrogen before it is formed. Therefore, nitrogen should be supplied at the seedling stage to promote seedling growth. Phosphorus can promote the ripening of peanuts, fullness of seeds, increase pod formation rate, kernel yield and oil content, and also promote the formation and development of nodule. Potassium absorption is very large, and potassium promotes the growth of stems, husks and nuts. In soils with poor soil fertility, the effect of increasing potassium fertilizer is obvious. Peanut is a calcium-loving crop. Calcium can enhance the metabolism of nitrogen and is beneficial to the formation and development of roots and nodules. Molybdenum is an indispensable element in the process of nitrogen fixation in root nodules. Molybdenum can promote protein synthesis and increase nitrogen fixation capacity.
Under medium fertility level, the fertilization amount of peanuts in the whole growth cycle is 1500-2000kg (or commercial organic fertilizer 250-300kg), nitrogen fertilizer 8-11kg, phosphate fertilizer 4-6kg, and potassium fertilizer 7-8kg. Nitrogen and potassium fertilizers are divided into base fertilizer and topdressing twice. Phosphate fertilizer is used as base fertilizer, and fertilizer and farmyard manure (or commercial organic fertilizer) are mixed.
Base fertilizer: 1500-2000kg of farmer's fertilizer or 250-300kg of commercial organic fertilizer, 6-8kg of urea, 9-13kg of diamine phosphate, 6-7kg of potassium chloride, and 1-2kg of zinc sulfate per acre of zinc-deficient soil. The boron-deficient soil can be applied with borax 0.25-0.5kg per mu, and the molybdenum fertilizer can be soaked with 0.2%-0.35% ammonium molybdate solution. It is recommended to inoculate rhizobium. The following is the recommended amount of base fertilizer (kg / mu)
Top dressing: about 2.5kg of urea in the seedling stage; after the needles are podted, the 2%-3% aqueous solution of superphosphate can be sprayed 2-3 times, 7-10 days, if the flower grows weak, It can be added with 100-200g urea and sprayed; when the pod is mature, the amount of fertilizer needed is still relatively large. In order to prolong the functional period of the leaf and prevent premature aging, generally use 1% urea solution plus 2% calcium perphosphate clarification solution 50kg for foliar application, or spray with 50% of 0.1% potassium dihydrogen phosphate solution every 7-10 days. Spraying once in a row for 2-3 times has a certain effect of increasing yield; in zinc-deficient and boron-deficient soils, 0.1%-0.2% zinc sulphate or borax can be sprayed from the seedling stage to the initial flowering stage without applying zinc and boron to the base fertilizer. Aqueous solution, spray 2-3 times.
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