Don’t Mix The Concept Of Flush Fertilizer And Water Soluble Fertilizer, One Is Method, The Other Is Fertilizer Product
The method of applying fertilizer with water is also called flush fertilization, which is a method of fertilization, not a fertilizer product.
It is a kind of fertilizing method to provide supplementary nutrition in the period of rapid growth of crops. However, this method is convenient and quick, so it is widely used in vegetable fields and irrigated land for planting cash crops and special food crops.
Technical essentials of flush fertilization
1. Only water-soluble fertilizer can be applied with water if the type of fertilizer used for flushing and fertilization is correctly selected
Urea, ammonia, ammonium sulfate and ammonium nitrate are commonly used in nitrogenous fertilizer.
Potassium chloride and potassium sulfate can be used in potash fertilizer.In phosphate fertilizer, even water-soluble ammonium phosphate and diammonium phosphate should not be flushed, because the mobility of phosphate fertilizer after dissolution is very poor and easy to be fixed, and cannot be infiltrated into the root layer with water.The best application method of phosphate fertilizer can only embed it into soil layer by layer to improve its utilization rate.
2. The single feeding component of flush fertilizer must be simplified
In the planting of high-yielding vegetables, the amount of pure nitrogen should be controlled at 2-3 kg/mu each time, especially the nitric acid nitrogen should be controlled below this standard.Otherwise, the waste and loss of nutrients is great.It not only reduces the utilization rate of nitrogen fertilizer, but also may cause pollution to water quality.It is advisable to apply fertilizer for 2 times in the whole growth period.
3. Control of irrigation
Flood irrigation can be prevented by border irrigation. When irrigation by canal, the furrow depth is appropriate to the amount of water, so as to prevent the nutrient dissolved in water from losing with the water.
Many farmers like this way of applying fertilizer, which is effective.
However, to achieve the surface effect, a large amount of nitrogen fertilizer is applied unilaterally and applied with excessive use of irrigation and fertilization regardless of the cost, it will lead to excessive vegetable growth, decreased quality, decreased fertilizer utilization rate, great loss of nitrogen and aggravation of soil salinization.
In general, the following points should be mastered in principle:
The method of flash fertilizer should be used timely and appropriate, mainly for intensive vegetable cultivation, mainly nitrogen and potassium.
Four fertilizers not to be applied:
- phosphorus
- granulated compound mixing fertilizer
- solid organic fertilizer
- microorganism preparation or fertilizer
Different from washing and fertilizing, the popular water soluble fertilizer in the market is a new kind of fertilizer. Compared with traditional fertilizer, water soluble fertilizer has many advantages, but attention should be paid to the application method.
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