Experts from the Ministry of Agriculture gave the following recommendations on current apple production:

Orchard with an output of more than 4,500 kilograms: 25 to 40 kilograms of nitrogen fertilizer per acre, 10 to 15 kilograms of phosphate fertilizer, and 20 to 30 kilograms of potassium fertilizer. An acreage of 3,500 to 4,500 kilograms of orchard: 20 to 30 kilograms of nitrogen fertilizer per acre, 8 to 12 kilograms of phosphate fertilizer, and 15 to 25 kilograms of potassium fertilizer. Orchard with an output of 3,500 kg or less: 15 to 25 kg of nitrogen fertilizer per acre, 6 to 10 kg of phosphate fertilizer, and 15 to 20 kg of potassium fertilizer.

Early-maturing varieties, or soil fertile, or small-aged trees, or tree-potential orchards, apply organic fertilizer 2 to 3 square meters/mu; late-maturing varieties, thin soils, large trees, weak trees, orchards, organic fertilizers 3 to 4 square meters/mu Fertilizer is applied in 2~3 times (late maturing variety 3 times), the first time in mid-March, NPK combined application; the second time in mid-June, NPK combined application, increase potassium fertilizer dosage; From late July to mid-August, potassium is the mainstay, with a small amount of nitrogen fertilizer.

In the orchard where the soil is deficient in zinc, boron and calcium and not fertilized in autumn, 1 to 1.5 kg of zinc sulfate, 0.5 to 1.0 kg of borax and 30 to 50 kg of calcium nitrate per acre are applied, and mixed with organic fertilizer in early spring; the sulfur-deficient orchard should be Sulfur is also suitably applied by selecting a sulfur-containing fertilizer such as ammonium sulfate, potassium sulfate, superphosphate or the like.