(1) The time and place of fertilization are different. Basal fertilizer is generally applied before vegetable planting, so the base fertilizer can be turned into the bottom of the tillage layer, and full-layer fertilization can also be carried out; while the top dressing is usually carried out after planting and growing, it can only be used as a furrow or hole. Splashing, its depth is shallow.
(2) Different methods and dosages of fertilization. Basal fertilizers are generally applied deep and fully applied, and they are required to be supplied throughout the growing period. Therefore, they are generally used in large quantities and must be applied at one time. Top dressing is to apply different types of fertilizer according to the requirements of different elements in different growth stages of various types of vegetables. The amount of fertilizer is not large, but the frequency is more.
(3) The types of fertilizers for basal and top dressing are different. Since basal fertilizers provide nutrients for the whole or most of the growing season, the basal fertilizers are generally slow-release organic fertilizers. The top-dressing is to meet the needs of the plant for a certain element in the short-term, so most of them are fast-acting fertilizers. Or liquid fertilizer.
(2) Different methods and dosages of fertilization. Basal fertilizers are generally applied deep and fully applied, and they are required to be supplied throughout the growing period. Therefore, they are generally used in large quantities and must be applied at one time. Top dressing is to apply different types of fertilizer according to the requirements of different elements in different growth stages of various types of vegetables. The amount of fertilizer is not large, but the frequency is more.
(3) The types of fertilizers for basal and top dressing are different. Since basal fertilizers provide nutrients for the whole or most of the growing season, the basal fertilizers are generally slow-release organic fertilizers. The top-dressing is to meet the needs of the plant for a certain element in the short-term, so most of them are fast-acting fertilizers. Or liquid fertilizer.
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