When fertilizing in autumn, the cherry saplings below 3 years of age are in the period of crown enlargement, and their nutrient growth is strong. The amount of nitrogen is more, and nitrogen fertilizer should be used as the main component to assist the appropriate amount of phosphate fertilizer to promote the formation of crown; the beginning of 3-5 years In fruiting saplings, the tree grows from vegetative growth to reproductive growth, and the number of flower buds increases. Attention must be paid to controlling nitrogen, increasing phosphorus, and supplementing potassium. For trees above 6 years of age entering the fruit stage, the amount of fertilizer should be increased, and more potassium should be added.
First, autumn base fertilizer
1. Fertilization time The best period of autumn basal fertilization is from September to October, and early application is preferred. 2. Fertilization types are mainly organic fertilizers such as farmyard manures, pigs, and calves excreted in high-quality decomposing soil, and appropriate amount of compound fertilizer or phosphate fertilizer may be added. 3. Fertilization method When filling landfill, first fill 20 cm thick crop stalks on the bottom of the ditch, cover the soil with 20 cm above, and then mix the fertilizer and soil uniformly and apply them into the ditch. The applied layer of organic fertilizer is generally in the 15-40 cm soil layer. 4. Fertilizer Amount The autumn basal fertilization is generally combined with the expansion of a hole, farmyard manure or pig, calf manure: 50 grams per plant per sapling, 100 kg per tree at fruiting stage; pure chicken manure: 10 grams per plant per sapling, Sheng Fruit tree 30 kg per fruit; cake fertilizer: 15 g per plant, 30 kg per tree per fruit tree.
Second, deciduous spray fertilizer
1. Spraying time The cherry should be sprayed on the leaf one week before the fall. Spraying time can not be too early or too late, premature application of urea will cause new shoots to germinate or burn the leaves due to high urea concentration; spraying too late, nitrogen has fallen without being absorbed by leaves, but not Transport to the tree body. 2. Spraying concentration To increase the accumulation and concentration of nutrients in the cherry tree, 0.5% urea should be sprayed on the leaves.
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