Fluctuating fertilization selection criteria and precautions for use

Fluctuating fertilization selection criteria and precautions for use, the current application of fertilization in the market is widely used, the effect is relatively significant, such as in greenhouse cultivation, then the choice of fertilization and what should be paid attention to in use? The greenhouse soil is generally rich in phosphorus. The technical requirement for heavier fertilization is: the fertilizer should be fully soluble, generally containing no or less sub-components that will remain in the soil; the phosphorus content in the fertilizer formula should be less than appropriate; Sexual concentration barrier; nitrogen has a sustained effect.

Pay attention to the proportion of water and fertilizer in the application of fertilizer, in order to prevent the crop from being damaged due to excessive concentration. In order to prevent the concentration of vegetables from being impaired, the potassium source in the fertilization should be potassium sulfate or potassium nitrate and try not to use potassium chloride. Among them, the nitrogen source is also used as little as possible. The ammonium chloride is generally controlled within 20%, the nitrate nitrogen is 10%, and the other nitrogen is urea. The phosphorus in the fertilization is provided by monoammonium phosphate.

Sometimes it is easy to use some fertilizers because of some deviations, so it is necessary to understand some common problems in the application of fertilizer. In the process of using the fertilization, the deviation should be prevented: the use of simple urea, phosphate and potassium fertilizers can easily cause obstacles with excessive salt concentration; since the general compound fertilizer is not fully soluble, it will often produce excessive insolubility. The proportion of nutrients selected for flushing is not suitable for the application of high nitrogen, low phosphorus and high potassium.

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