How to fertilize three types of vegetables?

Leafy vegetables: Yelai vegetables refer to green leafy vegetables with shorter growth period, such as cabbage, green vegetables, leeks, spinach, celery, kale, etc., with the whole plant for edible. Due to the high density of plant tissues and the shallow distribution of roots, the requirements for soil available nutrients are urgent and sensitive. Once the nutrient is insufficient, the leaves grow slowly and yellow. Therefore, the fertilization method is mainly based on topdressing. The nutrient elements should be based on quick-acting nitrogen fertilizer. Generally, after the seedling stage and after harvesting one product, the fertilizer will be topdressed once, which will promote the rapid growth of the leaves of the plant. The amount of topdressing per mu is 8 to 10 kg of urea or 400 to 500 kg of human excrement or watering by plant, so as to facilitate absorption and utilization as soon as possible.
Rhizome vegetables: Rhizome vegetables refer to root vegetables that are formed after the growth period and the formation of vegetative organs (leaf stems), such as artichokes, radishes, cabbage, etc., with roots, tubers or leaf balls. edible. Since the growth of the vegetables enters the product, the growth of the leaves will gradually stop. Therefore, the fertilization method should be based on the base fertilizer and early topdressing, and a small amount of available nitrogen and potassium fertilizers should be added, and the fertilizer should be applied quickly at the seedling stage or after planting. . Apply 4 to 6 kilograms of urea per mu or 300 to 400 kilograms of human excrement, promote early and long-term growth, and set up a shelf for high yield. In the early stage of product formation, 6 to 8 kg of phosphorus and potassium fertilizer are applied per acre to promote the rapid transfer of nutrients in the stems to the reproductive organs to achieve high yield. When the urea water solution of 1 to 2 percent is sprayed outside the roots 1 to 2 times (5 to 7 days apart), the functional period of the leaves can be prolonged without premature aging.
Fruit vegetables: Fruit vegetables refer to vegetables that have a long flowering period in the growing season, such as solanaceous fruits, legumes, melons, and the like. Because the vegetative growth and reproductive growth of this kind of vegetables are carried out simultaneously, the time is longer and more three elements are needed. Therefore, the fertilization method should be based on the base fertilizer and the whole process, and the nutrient elements should be mainly nitrogen, phosphorus and potassium, according to the base fertilizer. The principle of flowering and fatning in the foot, early fatning and fruiting period, and after each harvest of fruit, immediately applied a quick-acting nitrogen fertilizer to promote the rapid formation and expansion of the sorghum fruit.