1. Basal fertilizer Basic fertilizer is a basic fertilizer that is provided to nutrients in fruit trees for a long period of time. Autumn basal fertilization is better than spring priming, and early autumn is better than late autumn or winter. This is because, in early fall fertilization, the root system grows at a positive peak, the root cleaves easily to heal and grow, the fertilizer rots, the decomposition time is sufficient, the mineralization degree is high, and it can be timely absorbed and utilized by the fruit trees; it can also increase the soil temperature and reduce root freezing damage; some fertilizers can Absorbed by the tree during the year, it is conducive to the manufacture and storage of organic nutrients. This is of great significance for satisfying budding, flowering, fruit setting and growth and development of fruit trees. The basal fertilizer uses more organic fertilizers and balanced compound fertilizers. The organic and inorganic fertilizers are fully mixed during fertilization, and deep-seated ditching is applied.
2. Top-dressing Fertilizers Because basal fertilizers are mostly long-acting fertilizers, the effect of fertilizers is smooth and slow. When fruit trees are in urgent need of fertilizers, they must be supplemented with fertilizers in time. Therefore, topdressing is also called compensatory fertilizer. The time and frequency of topdressing are related to climate, soil quality, age, and so on. Li Shu's common practice is top dressing before flowering, top dressing after flowering, top dressing during fruit enlargement, and top dressing after harvesting. The high-nitrogen compound fertilizer was selected in the early stage and the high-potassium compound fertilizer was selected in the later stage.
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