Four key points of fertilization for seasonal vegetables
Select fertilizer type Fertilize according to the type of vegetables. Cabbage vegetables such as Chinese cabbage and greens require more nitrogen, and quick-to-use high-nitrogen compound fertilizers should be used. Radish, potato, and other root vegetables should be re-applied with high-potassium fertilizers; cucumbers, peppers, tomatoes, and other fruits. Vegetables, in addition to nitrogen fertilizer, phosphorus, potash fertilizer demand is also larger, base fertilizer should use nutrient balanced compound fertilizer, and apply organic fertilizer. Reuse organic fertilizer. The application of organic fertilizers can not only improve soil physical, chemical and biological characteristics, ripen the soil, fertility and fertility, improve the quality of products, reduce the content of nitrates and nitrites in vegetables, increase the content of vitamin C, and increase the sugar content of fruits and melons. In addition, organic fertilizers can produce carbon dioxide during decomposition and utilization, and can accumulate “gas fertilizers†in greenhouses, which can improve the photosynthesis of vegetables and increase the production of vegetables. However, in order to prevent ammonia and nitrous acid poisoning and the spread of germs, the applied organic fertilizer must be decomposed, especially chicken manure, requiring a high degree of maturity and should be applied in advance. Determine the amount of economic fertilizer It was determined that the amount of economic fertilizer was calculated based on the level of vegetable production and soil fertility. At present, most of the vegetable field fertility levels should be controlled by nitrogen, phosphorus, potassium, targeted micro-fertilizer is the principle of fertilization. For vegetables with a short growing period or with roots, stems and leaves as the harvest, 1/2-1/3 of nitrogen fertilizer, all of the phosphorus, potassium, and trace fertilizers can be used as base fertilizer, and another 1/2-1/3 of nitrogen fertilizer is used as top dressing. Application. For fruits and vegetables, 1/3 nitrogen fertilizer, 2/3 phosphorus potassium fertilizer and all trace fertilizers can be used as basal fertilizer, and 2/3 of nitrogen fertilizer and 1/3 of phosphorus and potassium fertilizer can be used as top-dressing, which can be applied in different stages of vegetative growth and reproductive growth of vegetables. . Choose fertilizer type Anti-season vegetables generally should not use chlorine-based fertilizers, such as potassium chloride, ammonium chloride, etc., because the chloride ions can reduce the starch content in vegetables, so that the quality is degraded, and residues in the soil can cause soil compaction. Anti-season vegetables are also not suitable for the use of volatile ammonium nitrate, ammonium bicarbonate, and other nitrogen fertilizers. If used, it is best to apply the ditch to deep layers of the soil. Anti-season vegetables should also be given less magnesium sulphate and ferric sulphate fertilizers because sulfate ions are not easily absorbed by vegetables and remain in the soil, impeding the growth of vegetables. For fertilizers that are easily soluble in water, they are better when applied to the field with irrigation water. Potassium dihydrogen phosphate, urea, borax, and rare earth microelement fertilizers can be sprayed on the foliar surface in the manner of extra-root fertilizer, but the best spraying period and spray concentration should be mastered. Reasonable fertilization method The basal fertilizer is best applied one week before the colonization of vegetables and should be mixed well with the soil. Fertilizer can be planted 7-10 cm away from the plant ditch or hole chase, top dressing immediately after top dressing, watering, do not sprinkle fertilizer directly on the ground or plants, so as to avoid volatile fertilizer or burn vegetable seedlings. The top-dressing fertilizer should be in the peak period of vegetables need fertilizer and vegetable growth, it is best to choose the cloudy or evening time, try to spray the fertilizer solution to the back of the new leaves and leaves, in order to facilitate the absorption of vegetables. JIANGSU CLS TECHNOLOGY CORP.LTD , https://www.js-cls.com