Vegetable classification and fertilization

Fertilizer is the food of vegetable crops. Vegetables are generally short-term nutrient crops, and they can be propagated in multiple crops in one year. Due to the short growing season, the nutrients absorbed per unit time are longer than the growth period. Therefore, more fertilizer should be applied during cultivation. Roots with deeper roots, more fibrous roots, and more root hair can absorb more nutrients, and fertilization can be more extensive. However, root development is less, distribution is shallow, absorption of nutrients is poorer, and fertilization requires more precision. In the vegetative growth period and in the result period, vegetables need to absorb a large amount of nutrients to meet the growth needs. Therefore, sufficient fertilizer must be supplied, usually by stage fertilizer, alternation of organic and inorganic fertilizers, balance of N, P, K and trace fertilizers, fertilization and irrigation. Combine other measures to give full play to the role of fertilizer production and quality improvement.

First, leaf vegetable fertilization techniques and methods

Leaf vegetables mainly include Chinese cabbage, Chinese cabbage, green vegetables, spinach, and lettuce. 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.

Second, fruit and vegetable fertilization techniques and methods

Fruit 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. If the cucumber is sitting on the melon, it should be re-fertilized, and each batch of melon should be added once.

Third, root vegetables fertilization techniques and methods

The root vegetables mainly include radish, carrots, yam, etc. The edible portion is a 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.

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