Regarding the fertilization and water-soluble fertilizers, many farmers' friends can't tell. The application method of water-flooding is also called fertilization, which is a fertilization method, not a fertilizer product. It is a topdressing method that provides supplemental nutrition during the rapid growth of crops. Since it is supplemental fertilization, it cannot replace the main fertilization methods such as base fertilizer. However, because this method is convenient and fast, it is widely used in vegetable fields and irrigated land for growing economic crops and special food crops.
Correct choice of fertilization type
Urea, ammonia, ammonium sulfate and ammonium nitrate are commonly used in nitrogen fertilizer; potassium chloride and potassium sulfate are used in potassium fertilizer, and potassium nitrate is also used. In the phosphate fertilizer, even the water-soluble phosphorus monoammonium and phosphorus diammonium should not be applied, because the phosphate fertilizer has poor mobility and is easily fixed, and cannot penetrate into the root layer with water. The best application method of phosphate fertilizer can only be layered in the soil to improve its utilization.
The amount of fertilizer applied should be streamlined
In the high-yield vegetable planting, the amount of pure nitrogen should be controlled at 2-3 kg/mu, especially the nitrate nitrogen should be controlled below this standard. The limited amount of potassium fertilizer (potassium oxide) is generally 2-4 kg/ Mu; otherwise, the waste and loss of nutrients is large. It not only reduces the utilization rate of nitrogen fertilizer, but also may cause pollution to water quality. The fertilization of the whole growth period is generally recommended twice.
During the period of heavy application, the crop is growing in a large amount
For example, fruit and vegetables are applied in the fruit-bearing period, after picking melons and fruits, and Chinese cabbage is applied in the period of the core. In the cultivation of autumn vegetables, the temperature is selected to drop, the mineralization of soil is reduced, and the vegetable crop is suitable for a large number of growing seasons.
The amount of irrigation should be properly controlled
Under the irrigation mode, the flooding is prevented from flooding. When the canal is filled, the depth of the ditch is appropriate to the amount of water to prevent the nutrients dissolved in the water from being lost with water. Many farmers like to use this method of topdressing. It is effective to use it well. However, in order to pursue the effect of the surface, regardless of the cost, the use of a large amount of nitrogen fertilizer on one side and the abuse of fertilization will lead to a long vegetable, a decline in quality, a decrease in fertilizer utilization rate, a large loss of nitrogen, and an increase in salinization of soil properties.
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