成都平原典型菜园土重金属含量的空间分布特征

关键词：菜园土;重金属;空间分布;成都平原

Spatial Distribution of Heavy Metal in Typical Garden Soils of Chengdu Plain

（1.Department of Environmental Science and Engineering of Sichuan University， Chengdu 610065， China;

2.Institute of Geochemistry， Chinese Academy of Sciences， Guiyang 550002， China）

Abstract： Contents of heavy metal in two types of garden soils at different plantaion ages were investigated in Baijia town， Shungliu country， Chengdu city. Five kinds of heavy metals （Mn、Cu、Zn、Cr、Pb） were investigated by Surfer 8.0 and GS 9.0. The results showed that the two types of garden soil had the accumulation of heavy metals， but not exceeding the national standard. The countour of the garden soil with planting years more than ten years was relatvely sparse. The ratio of nugget and still of Manganese with planting year more than ten years was 42.7%， the rest were far less than 25.0%. It is indicated that regional factors played a major role in accumulation of heavy metals in garden soils in terms of spatial analysis. During long farming， the difference in the spatial distrubution of heavy metals in garden soil will be weaken.

Key words： garden soils; heavy metals; spatial distribution; Chengdu plain

1 材料与方法

2 结果与分析

2.1 重金属的含量分析

对两组数据进行显著性分析（图1），结果表明，两田块间重金属的含量具有显著性差异