关键词: 土壤污染, 重金属积累, 新型肥料, 生化机理

Abstract: Large quantity and various types of fertilizer in China, with different heavy metal content and complex mechanism on metal accumulation in crops of fertilizer cause an urgency to carry out safety assessment about fertilizer. This paper expounded the research progress of heavy metal safety evaluation of fertilizer from three aspects: heavy metal content of common fertilizer, the influence of fertilizers on the accumulation of heavy metals in crops and its mechanism. Heavy metal pollution in organic fertilizer and solid waste compost was serious, and heavy metal pollution in inorganic fertilizers and other new fertilizers could not be ignored either. On the one hand, fertilizer could cause heavy metal pollution to soil and crops as a pollution source. On the other hand, it could also affect heavy metal content in crops by changing the form of heavy metals in the soil, affecting the absorption of heavy metals by roots and metal-translocation from roots to shoot. Based on the review of heavy metal pollution characteristics, bioaccumulation behavior and bioaccumulation mechanism in common fertilizers, the research prospect about metal-safety assessment of fertilizer was put forward.

Key words: soil pollution, heavy metal accumulation, new fertilizer, biochemical mechanism