Rational Application Technology of nitrogen Fertilizer

Although all kinds of nitrogen fertilizers have their own characteristics, manufacturers also say how excellent their products are. However, in order to apply nitrogen fertilizer scientifically and reasonably, we should also consider the soil conditions, the application technology of nitrogen fertilizer and the demand of crop varieties.

Selection of nitrogen fertilizer varieties according to soil conditions

In alkaline soil, acidic or physiologically acidic fertilizer should be selected, and alkaline or physiologically alkaline fertilizer should be selected in acidic soil. Avoid using fertilizers that increase soil salinity in saline-alkali soil. Sulfur fertilizers such as ammonium sulfate should not be used in low-lying waterlogged soil to prevent the formation of hydrogen sulfide. Nitrate fertilizer should not be applied in paddy field to prevent leaching and denitrification.

Selection of nitrogen fertilizer according to crop nutritional characteristics

Leafy vegetables (green leafy vegetables, mulberry, tea, gramineae crops) need more nitrogen. Legume crops have rhizobium and only need to apply a small amount of nitrogen fertilizer at the initial stage of growth. Rhizome crops (sweet potato, potato, sugar beet, sugarcane) need nitrogen to enhance photosynthesis at the initial stage, but too much nitrogen will affect starch accumulation in the later stage.

Balanced fertilization according to soil testing formula

By mastering the soil survey data, the reasonable amount of fertilizer application is calculated. And balanced fertilization according to the needs of crops.

Advocate deep application

Prevent ammonia volatilization, prevent nitrification-denitrification, and enhance the utilization of nitrogen by crop roots.

Select a new type of nitrogen fertilizer

The use of urease inhibitors can alleviate the hydrolysis of urea and reduce the loss of ammonia volatilization. The use of nitrifying agent (nitrogen fertilizer synergist) can inhibit nitrification rate to some extent, slow down the transformation of ammonium nitrogen to nitrate nitrogen, reduce the loss of nitrogen in denitrification and phosphate leaching, and reduce the accumulation of nitrate in fruit and vegetable crops. The principle of slow-release nitrogen fertilizer is that the dissolution rate of fertilizer is slow, and it will not cause strong volatilization and loss of ammonia, so as to ensure that nitrogen is fully utilized.

At present, manufacturers put too much emphasis on the role of fertilizer products themselves, but in reality, nitrogen use efficiency is affected by many customer factors, such as soil conditions, climatic environment, farming patterns, crop varieties and so on. even though the new nitrogen fertilizer has a good effect on improving nitrogen use efficiency in theory, it can not guarantee to play a 100% role in the real environment of agricultural production. Therefore, scientific balanced fertilization is a comprehensive way to really improve the effect of nitrogen fertilizer application.