1 , fertilization types  In the autumn, fertilization should be based on organic fertilizer, and combined with quick-acting fertilizers such as nitrogen, phosphorus and potassium. Before application, in the organic-based fertilizer, phosphorus phosphate such as superphosphate is firstly stacked together; when applied, a certain amount of quick-acting nitrogen fertilizer, such as urea, ammonium bicarbonate, ammonium sulfate, etc., is applied in combination . 　　 2 , fertilization time  Fertilization time varies depending on the species and variety. Apple, pear with (after late September, late-maturing varieties of fruit picking) before and after the autumnal equinox appropriate. Fertilization time for grapes, peaches, and large cherries begins in October and ends before the soil is frozen, but the earlier the suitable fertilization period, the better. 　　 3 , the amount of fertilizer  Saplings human waste or chicken strain 15--20 kg ammonium sulfate 0--25 kg; First results of a tree with farmyard manure application 100--150 kg human waste or manure 20--25 kg; Results tree Yaoan number of determining the level of production of organic fertilizer; average yield of 2,000 kg, requires "fruit pounds pounds fertilizer"; mu 2500--3500 kilograms, required "fruit half kilogram pounds fat", and incorporated into the application phosphorus and potassium. 　　 4 , fertilization method  The specific fertilization method should be determined according to the condition of the tree body and the soil fertility. ( 1 ) Ring fertilization  Drill a 30 cm (width) 30 cm (deep) annular groove slightly outside the canopy , and apply the prepared organic fertilizer to cover the soil. This method is generally used for saplings. ( 2 ) Radiation ditch fertilization  Dig 30 (width) × 30 (deep) × 50 (length) cm of radiation ditch slightly outside the canopy , and cover the soil with fertilizer. This method can replace the radiation ditch every other year or every other time to expand the fertilization area. ( 3 ) fertilization in the trench  In the orchard line, between plants or interlaced trenching, it can also be combined with deep turning. ( 4 ) Fertilization in the whole garden  In adult trees or densely planted orchards, this method is used when the root system has been covered in the whole garden. The fertilizer is evenly spread in the garden and then turned into the soil.
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