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摘 要
通過實地調查，對蒙自草壩棚齡為2a、4a、5a的蔬菜大棚內土壤進行采樣分析，研究了當地大棚內土壤重金屬元素的含量狀況及其隨棚齡的變化趨勢。結果表明，(1)與露地土壤作比較，大棚內土壤中Zn、Pb、Cd的含量隨著棚齡的增加而增加，其中，Zn的含量與對照相比變化顯著，Pb、Cd的變化不顯著。Cu的含量隨著棚齡的增加而減少，2a、4a棚齡的變化顯著，5a棚齡的變化不顯著。(2)研究地區的土壤除Pb的含量未超標外，Zn、Cu、Cd均出現了不同程度的重金屬污染，其中，Cd的污染情況最為嚴重。
關鍵詞：設施土壤；棚齡；重金屬含量
ABSTRACT
Through field investigation, soils of vegetablegreenhouses 2 ,4and 5 years old have been collected and analysised that Contents of heavy metal elements in soils and its trend with age shed. The results showed that different heavy metal elements showed different tendencies in variation ;the contents of heavy metal elements of Zn,Pb,Cd with the shelf age increased.But the content of heavy metal elements of Cu decreased with increasing age shed, Pb,s content in soil is not exceeded the standards, others are exceeded the standards, which, Cd pollution was most serious.
Key words: Greenhouse soil; Age of utilization; Contents of heavy metal
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