Key Technical Points and Fertilization Methods for Topdressing Summer Peanuts
Fertilization should follow the "two topdressings, one spray, four supplements" approach. Specifically: the two topdressings are, first, early topdressing before the peanut plants form a full cluster, with 10 kg urea, 15 kg diammonium phosphate and 10 kg potassium chloride; the second topdressing is at the early stage of young pod swelling, generally 10 kg urea per mu. The one spray is in the late growth stage, per mu...
Fertilization should follow the "two topdressings, one spray, four supplements" approach. Specifically:
The two topdressings are: the first topdressing before the peanut plants form a full cluster, applied early, with 10 kg urea, 15 kg diammonium phosphate and 10 kg potassium chloride; the second topdressing at the early stage of young pod swelling, generally 10 kg urea per mu.
The one spray is: in the late growth stage, per mu use 0.5 kg urea plus 0.2 kg monopotassium phosphate dissolved in 50 kg water for foliar spraying 2-3 times, to prevent premature senescence.
The four supplements are: supplemental application of calcium fertilizer, molybdenum fertilizer, iron fertilizer and boron fertilizer. For calcium fertilizer, use phosphogypsum; before the peanut rows close, apply 50 kg phosphogypsum per mu shallowly into the pod-bearing layer. For molybdenum fertilizer, use ammonium molybdate; at the seedling stage, spray twice with a 0.05% ammonium molybdate solution. For iron fertilizer, use ferrous sulfate; after rain or irrigation, spray 2-3 times consecutively with a 0.2% ferrous sulfate solution. For boron fertilizer, use boric acid; spray twice with a 0.1% boric acid solution at the beginning of flowering and full flowering stages.