Soil testing and formula fertilization technology is a new technology promoted in agricultural production today. For different types of crops and their different growth periods, formulating fertilization according to soil nutrient content can greatly increase the yield of crops and save production costs. Recognize the growth characteristics of vegetables Vegetables are generally short-term nutritional crops that can be planted in multiple crops. Many types of vegetables, such as Chinese cabbage, radish, gourd, cucumber, etc., often produce as much as 5,000 kilograms per mu. Some fast-growing vegetables such as cabbage, radishes, leeks, etc., due to a short growing period, the nutrients absorbed per unit time are much longer than those with longer growing period and higher yield. Therefore, more fertilizer should be applied during cultivation. The absorption of soil nutrients by vegetables largely depends on the development of the root system. The roots are generally deep-rooted, broad-rooted, rooted and rooted vegetables (pumpkins, melons, etc.) and roots larger vegetables (beets, carrots, eggplants, etc.), can absorb more nutrients, and can grow in thin soil Fertilizer can be used more extensively; vegetables with poor root development, shallow distribution, and poor absorption of nutrients, such as cucumbers, onions, and lettuce, must be planted in fertile soil and must be fertilized. The requirements for soil nutrient conditions are different for each growing period of vegetables. The roots of vegetables during the seedling stage are not yet developed, and the amount of nutrients absorbed is not too large. However, the requirements for fertilizers are very high. Some thin and quick-acting fertilizers should be properly applied. During the vegetative growth period and the result period of vegetables, a large amount of nutrients must be absorbed and sufficient supply must be provided, usually taken. Stage dressing, alternation of organic and inorganic fertilizers, NPK fertilization and micro-fertilizer balance, combination of fertilization and irrigation, etc., in order to give full play to the role of fertilizer production. According to the characteristics of fast growing vegetables, weak roots, and high yield, it is necessary to use organic fertilizers in combination with chemical fertilizers. Organic fertilizer can not only provide a variety of nutrients for vegetables, but also with the decomposition of organic fertilizer, it is also conducive to increase production and improve quality. Classification fertilization technology Leaf vegetables: Leaf vegetables include cabbage, green vegetables, spinach, and leeks. Nitrogen fertilizers are the main nitrogen fertilizers for leafy vegetables, but phosphorus and potash fertilizers are also required for the growth of nitrogen fertilizers. Such as the cultivation of Chinese cabbage, two fertilization begins to enter the rosette period and before the package is the key to high yield. If the supply of nitrogen fertilizer is insufficient during the whole growth period, the plants are short and the tissues are rough, and the leafy vegetables cultivated in spring are also easy to twitch early; if the phosphorus and potassium fertilizers are insufficient in the late period of the leaf-type leaf vegetables, they are often not easy to bear. Fruit and vegetables: Fruits and vegetables include melons, solanes, and beans, and edible parts are reproductive organs. Generally, the seedlings need more nitrogenous fertilizer, but excessive application of nitrogenous fertilizers can cause leggy, but instead prolong the flowering result, which results in flowering and fruit drop. In the reproductive growth period, the amount of phosphorus and potassium fertilizers needs to increase rapidly, and the amount of nitrogen fertilizer needs to decrease slightly. Therefore, phosphorus should be added. Potash fertilizer, control the amount of nitrogen fertilizer. After the cucumber is sitting on the melon, it should be re-fertilized, and each batch of melon should be supplemented once. Root vegetables: Root vegetables mainly include radish, carrots, mandarin, etc. The edible portion is fleshy root. In the early growth stage of root vegetables, more nitrogen fertilizer is needed to promote the formation of green leaves with large scales; in the middle and late stages of growth (in the root growth stage of the fleshy roots), more potassium fertilizer should be applied, and the amount of nitrogen fertilizers should be properly controlled to promote the transport of assimilated substances from the leaves into the roots so as to form powerful fleshy roots. . If the nitrogen fertilizer is too much and the potassium fertilizer is insufficient at the later stage of the growth of the root vegetables, the above-ground part will be prolonged, the rhizome will be small, the yield will be reduced, and the quality will be deteriorated. Plant cultivation and organic fertilizer Greenhouses and other protected vegetables have a much larger amount of fertilization per unit area than exposed vegetables and are leached from rainwater. As a result, most of the remaining fertilizer remains in the soil, causing excessive concentrations of soil solution and impeding the absorption of root nutrients. To cultivate vegetables in the field, full consideration should be given to the post-effect of fertilizers for the former crops, organic fertilizers should be applied more, and chemical fertilizers should be used less frequently to avoid the damage caused by salt accumulation to the rear-row vegetables. 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