Rational fertilization and anti-fertilization


Improper application of chemical fertilizers in crops may cause fat damage, burning seedlings, plant wilting and so on. For example, a one-time application of fertilizer after excessive fertilization or inadequate soil moisture, will cause excessive concentration of soil solution, root water uptake difficulties crop, leading to wilting plants or even dead. Excess nitrogen fertilizer, soil have large amounts of ammonia or ammonium ions, on the one hand, ammonia volatilization, when the air in small droplets of mist or basic, crop burns, scorch spots generated on the blade; on the other hand, ammonium ions Under the action of nitrosating bacteria, the conversion to nitrous acid gasification produces nitrogen dioxide gas, which will poison the crops, and irregular water-like plaques appear on the leaves of the crops, and the veins gradually turn white. In addition, when there is too much ammonium in the soil, the plant will absorb too much ammonia and cause ammonia poisoning. Excessive use of certain nutrients, not only on crops produce poison, also interfere with the absorption of other nutrients to crops, caused by nutrient deficiency disease. For example, excessive nitrogen application can cause calcium deficiency; excessive nitrate nitrogen can cause chlorosis deficiency; excessive potassium can reduce the effectiveness of calcium, magnesium and boron; excessive phosphorus can reduce the effectiveness of calcium, zinc and boron. . In order to prevent the occurrence of fertilizer damage , attention should be paid to rational fertilization in production.

First, increase the application of organic fertilizer to improve soil buffer capacity.

The second is to apply fertilizer according to regulations. According to the soil nutrient level and the demand for nutrients in the crop, rational fertilization, do not increase the amount of fertilizer. Applying topdressing to master the principle of thin fertilizer and diligence.

The third is full-layer fertilization. The same amount of fertilizer, when applied locally, often causes a sharp increase in the concentration of local soil solution, which damages the roots of crops. Instead of full-thickness fertilization, so that the fertilizer evenly distributed throughout the topsoil, can avoid crop damage.


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