How to use flush fertilization well? You need to master the correct application methods
How do you use flush fertilization well? Please give an introduction. First, correctly choose the type of fertilizer for flush fertilization. Only water-soluble fertilizers can be applied with water. Among nitrogen fertilizers, urea, ammonia water, ammonium sulfate and ammonium nitrate are commonly used; among potassium fertilizers, there are potassium chloride and potassium sulfate, and potassium nitrate can also be used. Among phosphorus fertilizers, even if they are water-soluble monoammonium phosphate and phos...
How do you use flush fertilization well? Please give an introduction
First, correctly choose the type of fertilizer for flush fertilization. Only water-soluble fertilizers can be applied with water. Among nitrogen fertilizers, urea, ammonia water, ammonium sulfate and ammonium nitrate are commonly used; among potassium fertilizers, there are potassium chloride and potassium sulfate, and potassium nitrate can also be used. Among phosphorus fertilizers, even if they are water-soluble monoammonium phosphate and diammonium phosphate, do not apply them by flushing, because phosphorus fertilizer has very poor mobility after dissolving and is easily fixed, and cannot infiltrate into the root layer with water. For this reason, the best application method for phosphorus fertilizer is to bury it in the soil in layers, so as to improve its utilization rate.
The nutrient amount of a single flush fertilization must be standardized. In high-yield vegetable cultivation, the amount of pure nitrogen each time should be controlled at 2 to 4 kg/mu, especially nitrate nitrogen should be controlled below 2 to 3 kg/mu, and the amount of potassium fertilizer (potassium oxide) for a limited number of times is generally 2 to 4 kg/mu; otherwise, the waste and loss of nutrients will be large, which not only reduces the utilization rate of nitrogen fertilizer, but may also cause pollution to water quality. Flush fertilization during the whole growth period is generally appropriate 2 times.
The timing of crop flush fertilization is during the period of vigorous crop growth. For example, fruit vegetables are flush-fertilized during the full fruit stage and after picking melons and fruits; another example is the heading stage of Chinese cabbage. In autumn vegetable planting, it is appropriate to choose a time when the temperature drops, soil mineralization decreases, and vegetable crops are in a period of vigorous growth.
Control of irrigation volume. Under border irrigation, prevent flooding irrigation; when irrigating through channels, the ditch depth should match the water volume to prevent nutrients dissolved in water from being lost with the water.
The method of flush fertilization should be used at the right time and in the right amount, mainly for topdressing in intensive vegetable cultivation, mainly topdressing nitrogen and potassium; several fertilizers should not be applied by flushing: first, do not flush-apply phosphorus, second, do not flush-apply granular compound fertilizer, third, do not flush-apply solid organic fertilizer, fourth, do not flush-apply microbial preparations or fertilizers.
Get more water-soluble fertilizer application techniques
Get more fertilizer application techniques