What should be noted when applying nitrogen fertilizer? A detailed explanation of the key points for using various types of nitrogen fertilizer
What should be noted when applying various nitrogen fertilizers? Please introduce the following points to note when applying various nitrogen fertilizers: 1. Ammonium nitrogen fertilizers should not be mixed with alkaline fertilizers. After mixed application, ammonia gas will volatilize, reducing the fertilizer effect. 2. Ammonium bicarbonate should not be broadcast. Ammonium bicarbonate is extremely unstable in nature, and after being broadcast on the soil surface, under...
What should be noted when applying various nitrogen fertilizers? Please introduce
The following introduces the points to note when applying various nitrogen fertilizers:
1. Ammonium nitrogen fertilizers should not be mixed with alkaline fertilizers. After mixed application, ammonia gas will volatilize, reducing the fertilizer effect.
2. Ammonium bicarbonate should not be broadcast. Ammonium bicarbonate is extremely unstable in nature, and after being broadcast on the soil surface, under high temperature and high humidity conditions, it is prone to causing large volatilization losses.
3. Ammonium sulfate should not be applied over the long term. It is an acidic fertilizer, and long-term application on calcareous soil will cause soil compaction and destroy soil structure.
4. Ammonium sulfate should not be applied in large amounts in paddy fields. After ammonium sulfate is applied to paddy fields, it will fall into the oxygen-deficient reduction layer, where SO42- is reduced to H2S, easily causing rice to form black roots and rotten roots.
5. Ammonium chloride should not be applied to chlorine-sensitive crops. Applying ammonium chloride to potatoes, sugarcane, tobacco and berry crops will seriously affect crop quality.
6. Nitrate nitrogen fertilizers should not be mixed with organic fertilizers. Organic fertilizers contain more organic matter, and when they encounter nitrate nitrogen fertilizers, under the action of denitrifying bacteria, nitrification reactions will occur, causing nitrogen loss and reducing the fertilizer effect.
7. Nitrate nitrogen fertilizers should not be applied in paddy fields. Under oxygen-deficient conditions, nitrate nitrogen fertilizers are easily decomposed by denitrifying bacteria, separating out nitrate radicals that are lost with water, reducing fertilizer efficiency.
8. Urea should not be used as seed fertilizer. Urea contains a certain amount of biuret, which affects seed germination, and when the concentration is too high, it can cause seed poisoning and burn sprouts.
9. Urea should not be applied shallowly. After urea is applied to the soil, under the action of soil microorganisms, it will be converted into ammonium nitrogen. If applied too shallowly, it is very easy to decompose NH3 and volatilize.
10. When urea is used as a foliar topdressing, avoid too high a concentration. Urea is a variety with relatively good foliar topdressing effects, but the application concentration should not be too high either. Generally, for grain and cotton crops it can be kept at 0.8-1%, and for fruits and vegetables 0.4-0.6%.
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