Vegetable topdressing should start from two aspects: one is to supplement nutrients (nitrogen, phosphorus, potassium, calcium, etc.); the other is to activate the soil, promote root length, and appropriately supplement trace elements.
Supplement nutrients, optional compound fertilizer. Choose different fertilizer types based on the growth and nutritional properties of the vegetables. Before flowering and fruit setting, the topdressing type is mainly nitrogen and phosphorus, in order to promote plant vegetative growth and flower bud differentiation; phosphorus and potassium fertilizer are dominant in flowering and fruiting stage; in the middle and late stages of vegetable growth, attention is paid to the comprehensive supplement of NPK, and it can also be based on actual conditions. Fertilization on the surface prevents premature aging of plants, promotes nutrient reflux, and improves overall yield. The general amount of topdressing is 15~20 kg.
Promote rooting, optional amino acid type, humic acid marine biotype, microbial fertilizer. According to the characteristics and requirements of the product, the dosage is generally about 20~25 kg per mu.
(Source: Farmers' Daily Author: He Liming)
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