Relationship of Absorption and Accumulation of Heavy Metals by Cichorium intybus L.(partim) with Soil Chemistry
[Objective] The relationship between heavy metal accumulation and soil heavy metal content,soil pH,cation exchange capacity and organic matter content was discussed.[Method]Concentrations of As,Cd,Cr,Cu,Ni,Pb and Zn in younger leaf,older leaf and root of Chicory [Cichorium intybus L.(partim)] planted in 3 kind of soils were determined to investigate the relationship between absorption and accumulation of heavy metals and soil properties by absorption coefficient and correlation coefficient.[Result] The heavy metal content in European chicory followed the order as root ＞ old leaf ＞ young leaf,and the heavy metal was not easily moved up after being absorbed by European chicory.In addition to Cd,there was no correlation between heavy metal content and soil heavy metal content in various parts of European chicory,and the concentration coefficient of heavy metal was less than 1,which was not rich in soil heavy metal.Under 3 soil conditions,the European chicory root and the old leaf had a certain enrichment of Cd,and the young leaf in the neutral and alkaline soil were not rich in Cd.Absorption of heavy metals with European Chicory was the most closely related to soil pH.Acidic soil helped European chicory to absorb heavy metals such as As,Cd,Cr,Cu,Ni,etc.It was especially easy to accumulate As and Cd.Alkaline soil,Pb and Zn were easily absorbed and moved up by European chicory.The relationship between soil heavy metal and soil cation exchange capacity and soil organic matter in Europe chicory was complex and needed to be further studied.[Conclusion] It was generally safe to plant European chicory in neutral and alkaline soil,and to cut the young leaf.European chicory had a large biomass and its old leaf and roots could be used as a restorative crop for Cd contaminated soils.Different from exogenous pollution,soil heavy metal endogenous pollution was not necessarily transmitted to crops.Improving soil pH could reduce the effectiveness of heavy metals and was an effective way to improve heavy metal pollution.
European chicoryHeavy metalsAbsorption and accumulationsoil pHSoil cation exchange capacitySoil organic matter
NETL
NSTL
万方数据
维普
