随着农业生产的发展,不断提高作物单位面积产量,单位面积的施肥量也相应地增加.由于施用化肥不合理,致使某些地区的氮肥用量超过实际需要.由于施用化肥量不断增加,合理施肥更加重要起来.人们企图施用更多的化肥以提高作物产量,却往往适得其反而产生“肥害”.但施肥量不足,又会使土壤的生产潜力不能充分发挥. With the development of agricultural production, continuous improvement of crop yield per unit area, the amount of fertilizer per unit area is also increased due to irrational application of fertilizers, resulting in some areas of nitrogen consumption exceeds the actual needs due to the increasing use of chemical fertilizers, fertilizers More importantly, people are trying to use more fertilizer to increase crop yields, but they often produce “fatal fertilizers.” However, inadequate fertilizers can make the potential of soils less available.