Autumn is the harvest period of medium- and late-maturing apples, and it is also a critical period for orchard management. Among them, deep-turning is suitable from mid-September to early-October. It is possible to use methods such as putting a tree in a nest (enlarging a hole), deep tumbling between rows and deep in a garden, deep turning in the entire garden, etc., with a depth of 60 to 80 cm, and paying attention to a lesser wound diameter 1 Roots above centimeters. Deep plowing should be combined with mature soils. Generally, non-perishable twigs and hard stalks are layered and filled into the bottom of deep plowing ditch, and a small amount of nitrogen fertilizer is applied, and then backfilled with topsoil; such as farmyard manure, green manure, compound fertilizer, etc. Iron, zinc and other fertilizers should be applied together. Deep roots should not be exposed to prolonged sun exposure and freezing, and be filled with water in time to fill the soil. On the basis of deep turning, 0.3% to 0.5% urea, 0.3% potassium dihydrogen phosphate, 500 times photosynthetic fertilizer, 0.3% to 0.5% zinc sulfate, and 0.3% to 0.5% borax solution are used as foliar spray fertilizer. Prolong the functional period of leaves, improve photosynthetic performance, and correct the deficiency of fruit trees. After deciduous fruit trees, they must be poured with frozen water to ensure safe wintering.
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