Techniques and Methods for Classifying and Fertilizing Vegetables

The roots of vegetables during the seedling stage are still underdeveloped, but the requirements for fertilizers are very high. Some thin and quick-acting fertilizers should be applied. During the period of vegetative growth and the outcome of vegetables, adequate fertilizers must be supplied. Usually, fertilizers are applied in stages, alternating between organic fertilizers and inorganic fertilizers. NPK fertilizer and micro-fertilizer balance, combined with fertilization and irrigation measures to give full play to the role of fertilizer production.

According to the characteristics of vegetables, 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.

Different vegetables require different fertilization techniques and methods.

1. 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.

2. 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 lead to leggy, but instead prolong the flowering result, which results in flowering and fruit drop. In the period of human reproductive growth, the amount of phosphate fertilizer needs to increase rapidly, and the amount of nitrogen fertilizer needs to be reduced 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.

3, root vegetables: root vegetables are mainly carrots, carrots, etc., edible parts are fleshy roots. 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.

Facilities for growing vegetables should be applied more organic fertilizer. Because greenhouses and other protected vegetables, compared with the amount of fertilizer on the exposed area per unit area is much larger, and due to no rain leaching, resulting in most of the remaining fertilizer remains in the soil, so that the concentration of soil nutrient solution is too high, preventing the root from absorbing nutrients, so In the cultivation of vegetables in protected areas, full consideration should be given to the aftereffect of fertilizers for the preceding crops, organic fertilizers should be applied more, and chemical fertilizers should be appropriately used to avoid the damage caused by salt accumulation to the rear-row vegetables.

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