Avoid the shallow application of nitrogen fertilizer. Because nitrogen fertilizer is applied in the shallow layer, it is easy to decompose and volatilize nitrogen after being exposed to sunlight. Among them, the volatility of ammonium hydrogencarbonate is particularly prominent. Therefore, it is necessary to change the habit of spreading on the surface layer and adopt a method of deep trenching to prevent the volatilization of nitrogen.
Avoid applying a chemical fertilizer. The application of a single chemical fertilizer will result in the destruction of the soil aggregate structure and the hardening of the texture, causing the soil to become sour or alkaline, which seriously destroys its physical and chemical properties. Moreover, the application of a single fertilizer can also affect the reproduction of beneficial microorganisms in the soil and reduce soil activity. Therefore, it is necessary to formulate fertilization reasonably and mix inorganic and organic fertilizers.
Avoid applying ammonia or ammonium bicarbonate in a greenhouse or greenhouse. Because the greenhouse or greenhouse ecological environment is in a high temperature state and a closed environment, these two fertilizers are extremely volatile under high temperature conditions. The higher the temperature, the faster the "ammonia" volatilizes, and the more volatile, which will cause ammonia to be smouldering. Plants that impede normal growth.
Avoid excessive application of high concentration of fertilizer at one time. No matter whether it is nitrogen fertilizer or organic fertilizer, do not apply too much at one time. For example, the nitrogen content of urea is as high as 46%. If the dosage is too large, the concentration will be too high, which will cause the crop roots to "pump up", causing damage to the roots. There is a rotten death. It is necessary to "less eat more meals" and stabilize the application of fertilization principles.
Do not ignore the nature of the fertilizer, mix and apply two kinds of fertilizer. For some "ammonia nitrogen" fertilizers, it should not be mixed with alkaline fertilizers such as grass ash, lime, phosphate fertilizer, etc. Otherwise, acid-base neutralization not only accelerates nitrogen volatilization, but also the product will cause soil compaction.
Avoid excessive application of nitrogen fertilizer on legume crops. Soybean, peanut, mung bean and other legumes are rooted with rhizobium. If the application of nitrogen fertilizer is too much, it will directly damage the nitrogen-fixing activity of Rhizobium, develop "inert" and reduce nitrogen-fixing capacity. If the soil in which the legumes are grown is extremely deficient in nitrogen fertilizer, a small amount of nitrogen fertilizer can be applied in combination with the phosphate fertilizer, and the effect of balanced fertilization can be obtained.
Avoid excessive application of chlorinated fertilizer to sensitive crops. For example, tobacco, citrus, potato, grape and other crops are very sensitive to chlorinated fertilizers. It is forbidden to apply too much chlorine fertilizer to such crops at one time.
Avoid applying or applying phosphorus fertilizer. Phosphorus has little mobility in the soil. Shallow application (spraying and surface application) causes phosphorus to stay on the surface and cannot reach the deep layer of the soil. The roots of the crop cannot be absorbed, thus greatly reducing the fertilizer efficiency of phosphorus application.
Avoid leafy spray fertilizer at noon in summer and autumn. Because the summer and autumn sunny days at high temperatures, if the roots are sprayed at this time, not only the fat evaporation will be fast, but also the fertilizer attached to the young leaves will burn the crops, which will waste the fertilizer and prevent the normal growth of the crops. The best time for spraying should be on a hot morning or in the evening.
Avoid fertilizing before heavy rain. Fertilization before heavy rain or rain, it is easy to be washed away, especially urea with high water solubility, nitrogen and phosphate fertilizer such as superphosphate should not be applied before heavy rain.
Avoid applying a chemical fertilizer. The application of a single chemical fertilizer will result in the destruction of the soil aggregate structure and the hardening of the texture, causing the soil to become sour or alkaline, which seriously destroys its physical and chemical properties. Moreover, the application of a single fertilizer can also affect the reproduction of beneficial microorganisms in the soil and reduce soil activity. Therefore, it is necessary to formulate fertilization reasonably and mix inorganic and organic fertilizers.
Avoid applying ammonia or ammonium bicarbonate in a greenhouse or greenhouse. Because the greenhouse or greenhouse ecological environment is in a high temperature state and a closed environment, these two fertilizers are extremely volatile under high temperature conditions. The higher the temperature, the faster the "ammonia" volatilizes, and the more volatile, which will cause ammonia to be smouldering. Plants that impede normal growth.
Avoid excessive application of high concentration of fertilizer at one time. No matter whether it is nitrogen fertilizer or organic fertilizer, do not apply too much at one time. For example, the nitrogen content of urea is as high as 46%. If the dosage is too large, the concentration will be too high, which will cause the crop roots to "pump up", causing damage to the roots. There is a rotten death. It is necessary to "less eat more meals" and stabilize the application of fertilization principles.
Do not ignore the nature of the fertilizer, mix and apply two kinds of fertilizer. For some "ammonia nitrogen" fertilizers, it should not be mixed with alkaline fertilizers such as grass ash, lime, phosphate fertilizer, etc. Otherwise, acid-base neutralization not only accelerates nitrogen volatilization, but also the product will cause soil compaction.
Avoid excessive application of nitrogen fertilizer on legume crops. Soybean, peanut, mung bean and other legumes are rooted with rhizobium. If the application of nitrogen fertilizer is too much, it will directly damage the nitrogen-fixing activity of Rhizobium, develop "inert" and reduce nitrogen-fixing capacity. If the soil in which the legumes are grown is extremely deficient in nitrogen fertilizer, a small amount of nitrogen fertilizer can be applied in combination with the phosphate fertilizer, and the effect of balanced fertilization can be obtained.
Avoid excessive application of chlorinated fertilizer to sensitive crops. For example, tobacco, citrus, potato, grape and other crops are very sensitive to chlorinated fertilizers. It is forbidden to apply too much chlorine fertilizer to such crops at one time.
Avoid applying or applying phosphorus fertilizer. Phosphorus has little mobility in the soil. Shallow application (spraying and surface application) causes phosphorus to stay on the surface and cannot reach the deep layer of the soil. The roots of the crop cannot be absorbed, thus greatly reducing the fertilizer efficiency of phosphorus application.
Avoid leafy spray fertilizer at noon in summer and autumn. Because the summer and autumn sunny days at high temperatures, if the roots are sprayed at this time, not only the fat evaporation will be fast, but also the fertilizer attached to the young leaves will burn the crops, which will waste the fertilizer and prevent the normal growth of the crops. The best time for spraying should be on a hot morning or in the evening.
Avoid fertilizing before heavy rain. Fertilization before heavy rain or rain, it is easy to be washed away, especially urea with high water solubility, nitrogen and phosphate fertilizer such as superphosphate should not be applied before heavy rain.
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