棚龄对大棚土壤重金属及盐分含量的影响

摘要

This article was to explore the effect of the age of the shed on the content of heavy metals and salt,and provide a theoretical support to sovle the problems such as yield decreasing,quality becoming inferior,and practical issues in agricultural development.Compared the accumulation of heavy metals and salt in different greenhouse soil with different shelf ages and regions.Studies found that heavy metal pollution exceeded the standard in several greenhouse soil with the increase in shelf age,along with more and more obvious tendency of salinization,especially with the Cl-,NO3-.This article reviewed the reasons of the elevated levels of heavy metals and soil salinization in soil greenhouse,mainly for fertilizer excessive and improper fertilization.%阐明大棚棚龄对大棚土壤中重金属及盐分含量的影响,并为解决由此而产生的大棚蔬菜和水果的产量下降、品质变劣的问题及解决农业生产中的实践问题提供理论支持。综述了调查的不同地区和不同棚龄蔬菜大棚土壤中的重金属和盐分含量。研究发现部分大棚土壤中存在重金属污染超标现象,且随着棚龄的增加重金属含量不断上升,同时大棚土壤盐渍化趋势随栽培年限的延长愈加明显,且主要是Cl-、NO3-含量的增加。总之,大棚土壤中重金属含量升高和土壤盐渍化的原因,主要是施肥（复合肥）过量和施肥不当引起。