First, fertilization time: July to early August
Second, fertilization varieties and quantities: phosphorus, potash fertilizer-based, each tree applied two ammonium diammonium + potassium sulfate 2.5 ~ 3 kg or applied phosphorus, potassium-based fruit tree fertilizer, Mushi 80 ~ 100 kg.
Third, the fertilization method: when the fertilization rain, more rain this year, before the rain or after the timely application of rain.
(a) underground fertilizer 1, radial fertilization: in the vertical projection of the tree crown to dig 4 to 6 radial grooves, the length of 0.5 meters to the trunk, the ditch depth of 15 to 20 cm, groove width of 20 cm. Ditch the fertilizer evenly and backfill it. 2. Acupuncture point fertilizer: Dig out 6 to 8 small pits with a length of 20 cm and a depth of 15 cm in the outer part of the canopy. Each small pit is evenly sprinkled with fertilizer and backfilled. 3, liquid fertilization: the fertilizer into a liquid, with fertilization guns in the tree plate under the application of fertilizer.
(2) Foliar spray fertilizer is selected by diluting potassium dihydrogen phosphate, rich potassium and other fertilizers into 0.3% to 0.5% of liquid fertilizer, evenly sprayed on the leaves, and the front and back surfaces of the blades shall be sprayed at intervals of 10 to 15 days. Once, spray three times.
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