贵州柑橘不同土壤类型重金属含量的相关性研究

Correlation Research of Heavy Metal Content in Different Soil Types in Guizhou Citrus Orchards

为探讨贵州柑橘园不同土壤类型重金属含量的相关性,按照土壤重金属元素的测定方法,分析了贵州清水江、红水河、南盘江沿岸柑橘园不同土壤类型中p H值、Cd、Hg、As、Pb、Cr的含量。结果表明,在黄壤和黄红壤中,Hg与Cd、As、Pb、Cr均呈负相关,不显著,Cr与Cd、Hg、Pb、As均呈负相关,不显著,说明Cd、Pb、As来源于相同的成土母岩,Hg、Cr是源于其它成土母岩;在石灰土柑橘园中,土壤重金属元素间都呈正相关,其中Cd与Hg、Pb互为显著正相关,Pb与Cr呈显著正相关,同样表明,Cd、Hg、Pb,Pb、Cr来源相同成土母岩。且石灰土柑橘园重金属含量最高,黄红壤柑橘园次之,黄壤柑橘园最低。黄壤柑橘园对重金属的吸附能力大于石灰土柑橘园。

In order to research the correlation of heavy metal content in different soil types in Guizhou citrus orchards,we measured the p H value and the content of Cd,Hg,As,Pb,Cr from different soil types citrus orchards located along Qingshui River,Hongshui River and Nanpan River. It turned out that between yellow soil and yellow-red soil,Hg was negatively correlated with Cd,As,Pb,Cr,non-significant. Cr was negatively correlated with Cd,Hg,Pb,As,non-significant. Which indicated Cd,Pb,As came from the same female rock,Hg,Cr came from some other female rock. In lime soil orchards,all the heavy metal elements are positively correlated,among them,Cd was significant positive correlation with Hg,Pb. Pb was significant positive correlation with Cr. This also indicated that Cd,Hg,Pb,Pb,Cr were came from the same female rock. And the heavy metal content of lime soil citrus orchard was highest,next was yellow-red soil citrus orchards,the minimum was yellow soil citrus gardens. The adsorption capacity of heavy metals by yellow soil citrus orchards was stronger than lime soil citrus orchards