Common Irrational Application of Chemical Fertilizer Irrational Fertilization is usually due to the unreasonable amount of fertilization, fertilization period, and fertilization methods. Common are:
1, shallow or spread fertilization. Fertilizers are volatile, lose or hard to reach the roots of crops, and are not conducive to crop absorption, resulting in low fertilizer utilization. Fertilizers should be applied 16 to 26 cm below the seed or plant side.
2, dual chlorine fertilizer. The compound fertilizer produced with ammonium chloride and potassium chloride is called double-chlorine fertilizer, containing about 30% chlorine, easy to burn seedlings, and timely watering.
3, urine-based compound fertilizer. Biuret high nitrogen, easy to burn seedlings, pay attention to the depth of watering and fertilization.
4. Improper application of chemical fertilizers to crops may result in fertilizer damage, burning of seedlings and wilting of plants. If one-time application is too much or there is insufficient soil moisture after fertilization, soil solution concentration will be too high, crop roots will have difficulty in absorbing water, resulting in wilting and even dead plants.
5. Excessive use of certain nutrient elements not only poisons crops, but also prevents crops from absorbing other nutrient elements, leading to deficiency of the disease. For example, too much nitrogen can cause calcium deficiency; too much potassium can reduce the effectiveness of calcium, magnesium, and boron; too much phosphorus can reduce the effectiveness of calcium, zinc, and boron.
6, should not be directly applied fresh human excreta. Fresh human waste contains a lot of germs, toxins, and parasite eggs. If it is used without being cooked, it can contaminate crops and cause diseases. It can only be applied after high-temperature heaping fermentation or harmless treatment.
Rational fertilization precautions
1. Increase organic fertilizer and improve soil buffering capacity.
2, soil testing and formulating fertilizer, according to the level of soil nutrients and crop nutrients demand, a reasonable fertilization, not arbitrarily increase the amount of fertilizer.
3, full-layer fertilization. The same amount of fertilizer, when applied locally, often causes a sharp increase in the concentration of the local soil solution, injuring the root system of the crop and changing it into full-layer fertilization, so that the fertilizer is evenly distributed throughout the plough layer, which can prevent the crop from harm.
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