A wide range of different types or varieties of vegetables have different nutrient requirements. Therefore, fertilization of vegetables should be done in four ways:
First, see the type of vegetables fertilization. Leaf types such as Chinese cabbage, vegetables, spinach, leeks, etc. should be more nitrogen fertilizer, such as urea, ammonium bicarbonate, human waste and other fast-acting fertilizers. Radish, potato and other stem vegetables are used for tuber roots and tubers. Fertilizers such as plant ash and potassium chloride should be added. Cucumbers, peppers, tomatoes, and other melons and fruits are eaten with fruits. In addition to nitrogenous fertilizers, the demand for phosphorus and potassium is also greater. It is better to use high-quality organic fertilizers and incorporate a certain amount of superphosphate and chlorine into the base fertilizers. Potassium.
Second, look at the weather changes in fertilization. According to the temperature, humidity, light and other conditions of fertilization, when the temperature is appropriate, appropriate fertilizer can be more materials, and the low temperature season can be appropriate or not Shi Shi. When rainfall or irrigated soil moisture is suitable, multiple fertilization is conducive to the microbial activity and decomposition of fertilizers, thereby increasing the effect of fertilization, drought or excessive rainfall, preferably with little or no fertilization. When the weather is dry, fertilizer should be poured in the morning or evening, and the amount should be less, the concentration should be thin, when the weather is cool and wet, the inter-row treatment or acupoint application should be used, and the dosage should be increased to increase the concentration and reduce the frequency of fertilizer application. .
Third, see fertilizer fertilization. Most organic fertilizers are used as base fertilizers; in addition to inorganic fertilizers, they can also be used as top-dressing fertilizers; various vegetable-specific fertilizers are best used as base fertilizers; and micro-fertilizer foliar fertilizers are used for spraying. For easily volatile fertilizers such as ammonium bicarbonate and ammonium nitrate, it is best to open-deeply bury them in the deep layer; for fertilizers that are easily soluble in water, the best effect is to be applied to the field with irrigation water; the phosphorus fertilizer moves slowly in the soil and can be uniformly applied to the tillage layer. .
Fourth, see cultivation methods fertilization. Generally, the amount of fertilizer needed for vegetables in protected areas is more than double that of the same kind of vegetables grown in open field, and no rainwater is leached. Most of the residual fertilizer remains in the soil. , Apply more organic fertilizer, appropriate less fertilizer, to avoid damage due to salt accumulation of vegetables.
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