1, young trees (1-4 years old) should be fertilized l0- 15 days before new shoots germinate and 1 time after new shoots are self-sheared, and the fertilization should be no less than 6-8 times throughout the year. After September, stop topdressing rhizosphere to prevent late autumn buds from sprouting. The amount of fertilization generally increases year by year with the increase of tree age.

2. Before the new buds germinate, apply 0.1-0.2kg urea or 0.1-0.2kg compound (mixed) fertilizer with medium and high concentration on the plants, and add decomposed manure. After the new shoots are self-sheared, the medium and high concentration compound (mixed) fertilizer is 0. 1-0. 15kg/ plant.