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First, leafy fertilization techniques and methods: leafy vegetables mainly include Chinese cabbage, Chinese cabbage, green vegetables, spinach, lettuce and so on. Leaf-plant topdressing is mainly based on nitrogen fertilizer, but at the same time of application of nitrogen fertilizer, phosphorus and potassium fertilizers need to be added. For example, when cultivated Chinese cabbage, two fertilizations before entering the rosette period and before the core are 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 coarse and hard, and the leafy vegetables cultivated in spring are easy to be convulsed early; if the phosphorus and potassium fertilizers are insufficient in the late stage, the ball is often difficult to form.
Second, fruit and vegetable fertilization techniques and methods: Fruits and vegetables include melons, solanes and beans, and edible parts are reproductive organs. Generally, the seedlings need more nitrogen fertilizer, but excessive application of nitrogen fertilizer is easy to cause long, but prolong the flowering result, leading to falling flowers and fruit; into the reproductive growth period, the amount of phosphate fertilizer needs to increase sharply, and the amount of nitrogen fertilizer needed to be slightly reduced. Therefore, phosphorus should be added. Potassium fertilizer, control the amount of nitrogen fertilizer. If the cucumber is sitting on the melon, it should be re-fertilized, and each batch of melon should be supplemented with a fertilizer.
Third, root vegetables fertilization techniques and methods: root vegetables mainly include radishes, carrots, yam, etc., edible parts are fleshy roots. In the early stage of root vegetables, more nitrogen fertilizer should be applied to promote the formation of hypertrophic green leaves; in the middle and late growth stages (the fleshy root growth period), more potassium fertilizer should be applied, the amount of nitrogen fertilizer should be properly controlled, and the assimilation of leaves should be promoted to the roots to form a strong fleshy root. . If there is too much nitrogen fertilizer and insufficient potassium fertilizer in the late growth stage of root vegetables, it is easy to make the aboveground part grow, the rhizome is small, the yield is decreased, and the quality is deteriorated.
Vegetable classification and fertilization method
Fertilizer is the grain of vegetable crops. Vegetables are generally short-term nutritional crops. They can be re-broadcast in a year. Due to the short growth period, the nutrients absorbed per unit time are longer than the growth period. Therefore, more quick-acting fertilizer should be applied during cultivation. Generally, vegetables with deep roots, more fibrous roots, and root hair can absorb more nutrients, and fertilization can be more extensive; while roots are less developed, shallower in distribution, poor in nutrient absorption, and finer in fertilization requirements. In the vegetative growth period and the fruiting period, vegetables need to absorb a large amount of nutrients, so that the fertilizer can meet the growth demand, so it is necessary to supply sufficient fertilizer, usually by staged topdressing, organic fertilizer and inorganic fertilizer alternation, NPK fertilizer and micro-fertilizer balance, fertilization and irrigation Combine and other measures to give full play to the role of fertilizer production and quality improvement.
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