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河南省土壤中氮素含量极为缺乏,一般不超过0.10%,多为0.05%,加以目前农家肥料肥分损失严重,含氮量较低,多为0.20%.据我省历年来各地丰产经验与科学试验证明:增施氮素肥料是提高农作物单位面积产量的首要施肥措施.氮素化肥价值高昂,供应量较少,成分最为浓厚,且多属水溶性可给态氮,如施用不当易造成很大浪费.因此,根据各种作物特点找出最有效的经济施用技术,使少量的氮素化肥充分发挥增产作用,是一个很值得研究的问题.
Henan Province soil nitrogen content is extremely scarce, generally not more than 0.10%, mostly 0.05%, to be at present farmer fertilizer loss of serious loss, low nitrogen content, mostly 0.20% .According to the province over the years of rich experience and Scientific experiments show that increasing nitrogen fertilizer is the primary fertilization measure to increase yield per unit area of crops.Nitrogen fertilizers have high value, less supply and most abundant components, Therefore, it is worth studying that the most effective economic application technique should be found according to the characteristics of various crops so that a small amount of nitrogenous fertilizer can fully exert its stimulation effect.