While applying the base fertilizer to the vegetable field, a large amount of topdressing should be carried out during the growth process, and the fertilization technique is one of the more common methods. It is recognized by the majority of farmers because of its convenient application, fast absorption and good fertilizer efficiency. However, pay attention to the following problems when applying: 1. Choose the correct type of fertilizer. Different types of fertilizers are water-soluble and have different effects. When selecting, they should be selected according to the growth of vegetables, the degree of lack of fertilizer, and the characteristics of fertilizers. If the vegetable has symptoms of nitrogen deficiency, urea, ammonium nitrate, etc. may be used. When nitrogen, phosphorus and potassium are present, potassium sulfate compound fertilizer may be used. 2, the application method should be appropriate. When applying fertilization, the solid fertilizer should be dissolved into water in advance to form a mother liquor, and then applied with water (the organic fertilizer should be sprayed about 10 days before the application of the organic fertilizer, and the supernatant is taken with water). When I went to the countryside, I found that many farmers' friends directly sprinkled fertilizers and watered them, causing uneven fertilization, local concentration was too high, and root burning occurred. 3, the amount of fertilizer should not be too large, the concentration should not be too high. When using the fertilizer, the amount of fertilizer should be reasonably mastered. Too much concentration may cause excessive concentration and fat damage. If the application of urea is too much, ammonia gas and nitrous acid gas poisoning are likely to occur, and too little begonia is less than top dressing. Generally speaking, when watering according to the normal watering amount, the application amount of the solid fertilizer can be applied at 120% of the conventional ground application amount (the special flushing fertilizer currently sold on the market can be carried out according to the instructions). 4. Don't ignore climate factors. Temperature, light, frost, etc. all have an impact on the benefits of fertilizer use, and this should be taken into account when applying. If the temperature is low, it will affect the absorption and transportation of fertilizers by crops, and the growth of vegetables will be inhibited. 5. Do not apply a single fertilizer. When I went to the countryside, I found that the peasant friend recognized a kind of fertilizer and regarded it as a universal fertilizer. Frequent use caused excessive nutrients and caused physiological diseases of vegetables. The correct method was based on the different growth of vegetables. During the developmental stage, balanced fertilization and alternating application of various fertilizers.
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