化肥是农业生产过程中作物养分的重要供给源,施用效果明显、使用方便,因此,随着生产条件的逐步改善,其投入量不断增加。长期以来,大量、不合理施用化肥引起的农业生态环境问题越来越严重,导致耕地土壤质量不断下降。耕层土壤迅速流失,有机质含量不断下降,土壤结构受到严重破坏,保肥保水性明显降低;土壤酸化、碱化、盐渍化现象不断出现,耕地抵御自然灾害的能力大幅度降低;生态环境不断恶化,农产品质量安全令人堪 Fertilizer is an important supply source of crop nutrients in agricultural production. The application effect is obvious, and it is easy to use. Therefore, with the gradual improvement of production conditions, the input amount of fertilizer is continuously increasing. For a long time, a large number of irrational application of chemical fertilizers caused by agro-ecological problems are more serious, resulting in a continuous decline in the quality of arable land. The soil of the topsoil is rapidly lost, the content of organic matter is declining, the structure of the soil is severely damaged, and the fertilizer holding water retention capacity is obviously reduced. The phenomena of soil acidification, alkalization and salinization continue to occur, and the capability of arable land to resist natural disasters is greatly reduced. Deteriorating, agricultural product quality and safety is worthy of note