There are many kinds of vegetables, different biological characteristics, and different nutritional requirements, so different types of vegetables should adopt different methods of fertilization. I. Growth characteristics of vegetables and fertilization methods 1. Vegetables are generally short-term nutritional crops that can be propagated repeatedly. Many types of vegetables such as Chinese cabbage, radish, wax gourd, cucumber and other mother-family products often reach more than 5,000 kilograms, and therefore require a large amount of fertilizer. Some fast-growing vegetables such as cabbage, radishes, parsley, etc., due to the short growing period, the absorption of nutrients per unit time is much longer than the longer growing period, high yield of vegetables. Therefore, more fertilizer should be applied during cultivation. 2. The absorption of soil nutrients by vegetables depends largely on the development of the root system. In general, the roots are deep and broad, with many roots and roots. The vegetables with root hair and the vegetables with larger roots (such as wax gourd, carrot, eggplant, etc.) can absorb more nutrients and grow on thin soil. Fertilization can be used more extensively. However, poor root development, shallow distribution, poor absorption of nutrients such as cucumbers, onions, lettuce, etc., must be cultivated in fertile soil and fine fertilization. 3. The requirements for soil nutrient conditions in different growth stages of vegetables are different. Roots in seedling stage are not yet developed, and the amount of nutrients absorbed is not too large, but the requirements are very high. Some thin and quick-acting fertilizers should be applied properly. During the vegetative growth period and the result period, a large amount of nutrients is absorbed. Sufficient fertilizer must be supplied, and fertilizers are usually applied in stages. Fertilizers, inorganic fertilizers were alternated, NPK fertilizers and micro-fertilizers were complete, and fertilization and irrigation were combined to give full play to fertilizer production. 4. According to the characteristics of fast growing vegetables, weak roots, and high yield, organic fertilizers should be used in conjunction with chemical fertilizers. Because organic fertilizers not only provide a variety of nutrients for vegetables, but also with the decomposition of organic fertilizers, it helps improve quality and improve quality. Second, the classification of different vegetables fertilization technology 1. Leaf vegetables are mainly cabbage, spinach, parsley and so on. Nitrogen fertilizers are the main nitrogen fertilizers for leafy vegetables, but phosphorus fertilizers and potassium fertilizers must be added at the same time when nitrogen fertilizers are used during the growth period. If you cultivate cabbage, seize the second fertilization that begins to enter the rosette stage and before the package is the key to high yield. For example, if the supply of nitrogen is insufficient during the whole growing season, the plants are dwarf and the tissues are rough. In the spring, the cultivated leafy vegetables are also easy to twitch early. In the late period, the phosphorus and potassium fertilizers of the cabbage leafy vegetables are insufficient, and it is often difficult to make the ball. 2. Fruit vegetables include melons, solanaceous fruits, and legumes. Some of them are genital organs. Generally, seedlings need more nitrogen, but too much nitrogen fertilizer can easily cause leggy, but it can prolong the flowering and fruition, and increase the number of falling and falling fruits. Reproductive growth period, the demand for phosphorus increased rapidly, and the amount of nitrogen needed to reduce slightly, so increase the application of phosphorus and potassium fertilizers, control the amount of nitrogen fertilizer, cucumber fruit set, it should be re-fertilizer, after each batch of melons need to add fertilizer. 3. Root vegetables mainly include radish, carrots, etc. The edible portion is a fleshy root. In the early stage of growth, nitrogen is mainly supplied to promote the formation of large green leaves. In the middle and late stages of growth (the period of growth of fleshy roots), more potassium fertilizer should be applied, and the amount of nitrogen fertilizer should be appropriately controlled to promote the transport of assimilated substances from the leaves to the roots so as to form a strong fleshy mass. Straight roots, if there is too much nitrogenous fertilizer and insufficient potassium fertilizer in the later period, it will make the ground part slightly longer, the rhizome will be smaller, the yield will decline, and the quality will be deteriorated. 3. The cultivation of greenhouses such as organic fertilizer greenhouses and other protective vegetables is much larger than the amount of fertilizer applied per unit area of ​​open-air vegetables, and most of the remaining fertilizer remains in the soil due to no rain and water so that the concentration of soil solution is too high. In order to prevent roots from absorbing nutrients or damaging the root system, the cultivation of vegetables should fully consider the aftereffect of the front hoe fertilizer, apply more organic fertilizer, and use less fertilizer as appropriate, so as to avoid damage to crops caused by salt accumulation, and thus to further develop the protection of vegetables. Advantage.