磷肥杂质对土壤生态环境的影响

Effects of associated toxic constituents of phosphate fertilizers on the soil eco-environment

摘要: 论述了P肥中有毒有害成分重金属Cd、放射性和三氯乙醛对土壤生态环境的影响，比较不同产地和品种的P肥产品Cd含量，论述施用P肥对土壤和作物产品重金属含量的影响；讨论了土壤、作物和肥料Cd含量标准的制定；指出一般农田短期内不存在Cd污染，但对长期大量施用P肥的地区和特定作物（如根叶类蔬菜），施用P肥须谨慎。在现有施肥水平下，P肥中放射性杂质不会导致土壤放射性污染。废酸P肥中的三氯乙醛含量必需控制在作物临界剂量以下，并采取适当施肥方法。

Abstract: The impacts of the associated toxic constituents such as Cd,Chloral and radioactive elements on the soil environments and crop products are expounded.Cd content standard of soil,crop and fertiliaer are also discussed.Cd pollution of general farmland isn't existence in short-term,but fertilizer pollution must be paied attention to in area and special crop for long-term applied phosphate fertilizer.Radioactive impurity in phosphate fertilizer can't cause pollution of soil.Chloral contente in phosphate fertilizer must be control umder crop's critical dosage and assist fertilizer rationally.The strategies for overcoming these impacts are also discussed.