The scientific application of nitrogen fertilizer should pay attention to the following points:
Treat differently according to various nitrogen fertilizer characteristics. The volatile loss of ammonium bicarbonate and ammonia water is suitable for deep application of base fertilizer; nitrate nitrogen fertilizer has strong mobility in soil and fast fertilizer efficiency, which is a good top dressing for dry land; general paddy field can be used as ammonium fertilizer or urea. Some fertilizers are toxic to seeds, such as urea, ammonium bicarbonate, ammonia, lime nitrogen, etc., should not be used as seed fertilizer; ammonium sulfate, etc., although it can be used as seed fertilizer, the amount should not be too much, and soil is preferably isolated between fertilizer and seeds. . In the arid areas where rainfall is low, the problem of leaching of nitrate nitrogen fertilizer is not prominent. Therefore, it is more suitable to apply nitrate nitrogen fertilizer. In rainy areas or rain season, it is better to apply ammonium nitrogen fertilizer and urea.
Deep application of nitrogen fertilizer. Deep application of nitrogen fertilizer can reduce the direct evaporation of fertilizer, loss of water, nitrification and denitrification. Deep fertilization is also beneficial to root development, deep rooting and expanding nutrient area.
Reasonably apply other fertilizers. The combination of nitrogen fertilizer and organic fertilizer plays an important role in capturing high yield, stable yield and reducing cost of crops. This can not only meet the comprehensive needs of crops for nutrients, but also fertilize soil. Nitrogen fertilizer combined with phosphate fertilizer can improve the utilization of nitrogen and phosphorus nutrients, especially in soils with low soil fertility, and the application of nitrogen and phosphorus fertilizers is better. In soils with insufficient potassium content, the combination of nitrogen and potassium fertilizers can also increase the effect of nitrogen fertilizer.
Treat differently according to various nitrogen fertilizer characteristics. The volatile loss of ammonium bicarbonate and ammonia water is suitable for deep application of base fertilizer; nitrate nitrogen fertilizer has strong mobility in soil and fast fertilizer efficiency, which is a good top dressing for dry land; general paddy field can be used as ammonium fertilizer or urea. Some fertilizers are toxic to seeds, such as urea, ammonium bicarbonate, ammonia, lime nitrogen, etc., should not be used as seed fertilizer; ammonium sulfate, etc., although it can be used as seed fertilizer, the amount should not be too much, and soil is preferably isolated between fertilizer and seeds. . In the arid areas where rainfall is low, the problem of leaching of nitrate nitrogen fertilizer is not prominent. Therefore, it is more suitable to apply nitrate nitrogen fertilizer. In rainy areas or rain season, it is better to apply ammonium nitrogen fertilizer and urea.
Deep application of nitrogen fertilizer. Deep application of nitrogen fertilizer can reduce the direct evaporation of fertilizer, loss of water, nitrification and denitrification. Deep fertilization is also beneficial to root development, deep rooting and expanding nutrient area.
Reasonably apply other fertilizers. The combination of nitrogen fertilizer and organic fertilizer plays an important role in capturing high yield, stable yield and reducing cost of crops. This can not only meet the comprehensive needs of crops for nutrients, but also fertilize soil. Nitrogen fertilizer combined with phosphate fertilizer can improve the utilization of nitrogen and phosphorus nutrients, especially in soils with low soil fertility, and the application of nitrogen and phosphorus fertilizers is better. In soils with insufficient potassium content, the combination of nitrogen and potassium fertilizers can also increase the effect of nitrogen fertilizer.
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