In vegetable production, experienced farmers are aware of the use of classified fertilization techniques based on different types of vegetables.
Leaf vegetables. Refers to fast-growing vegetables, such as cabbage, green vegetables, leeks, spinach, and celery, which are mainly fresh, leafy, petiole, or tender stems. The fertilization method for such vegetables should be topdressing, and the fertilizer is mainly available nitrogen fertilizer. Generally, once in the seedling stage and after each harvest of a product, the topdressing fertilizer is immediately applied to promote the rapid growth of the plant leaves of the plant. Each cultivating urea 8-10 kilograms per acre or composting manure 500 kilograms may be applied to the plants to facilitate watering. The plants absorb and use as soon as possible.
Root vegetables. Refers to vegetables with straight, fleshy roots. Such as radish, turnip and root mustard. The fertilization method for this kind of vegetables should be based on basal fertilizer and early top dressing, and it should be mixed with a small amount of available nitrogen and potassium fertilizers. Fertilizers should be applied quickly after seedling stage or after planting. Mushi urea 4-6 kilograms or 300-400 kilograms of human waste, to promote early plant growth. Then, before the vegetables enter the vigorous growth stage, 6-8 kg of phosphorus and potassium fertilizers are applied per acre to promote the high yield of the plants. At this point, spraying 1%-2% urea aqueous solution 1-2 times (every 5-7 days), can also extend the function of the leaves, not premature aging.
Fruits and vegetables. Refers to vegetables with longer growing seasons, such as solanaceous fruits, beans, and melons. This kind of vegetables requires more nitrogen, phosphorus and potassium fertilizers. Fertilization should be based on basal fertilizer and full-dressing topdressing. The nutrient elements are mainly nitrogen, phosphorus and potassium. Fertilization is based on the principle of basal fertilization, early dressing, and fertility during the fruiting period. After each harvest of fruit, the topdressing nitrogen fertilizer is immediately applied to promote the rapid formation and enlargement of the pod fruit. If spraying with anti-dropping agent, guagonin, cytokinin, etc., the yield increase will be better. It is necessary to ensure the coordination between Changteng and Guaigua, and in particular to prevent premature growth and subsequent deferment.
Due to the different characteristics of various melons, based on the application of organic fertilizer-based basal fertilizers, it should also be “causing melon fertilizer.†If the cucumber is intolerant to a solution with a high concentration of fertilizer, it is necessary to use "dilute fertilizer." The suction ability of the pumpkin is strong, and it is prone to madness in the early stage. If the nitrogen fertilizer is used excessively, the light long vine does not produce melon, so the application of the nitrogen fertilizer cannot be excessive. When melon nitrogen topdressing, should avoid the fruit setting period, otherwise it will make the vine grow, resulting in melon and reduce production. The loofah is fast and has many melons. It takes a long time to produce melon and requires more fertilizer. In addition to applying the base fertilizer, during the melon period, it should be applied once every 7-10 days to ensure that there is sufficient water during the melon period. Nutrient supply, and promote multi-node melons.
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