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氮肥是指具有氮(N)标明量,并提供植物氮素营养的单元肥料。氮肥的主要作用是:(1)提高生物总量和经济产量。(2)改善农作物的营养价值,特别能增加种子中
Nitrogen fertilizer is a unit fertilizer that has a nitrogen (N) labeled amount and provides plant nitrogen nutrition. The main role of nitrogen fertilizer is: (1) to increase the total biomass and economic output. (2) to improve the nutritional value of crops, especially to increase the seeds