Soil Heavy Metal Content and Pollution Assessment under Organic Planting and Breeding Mode in Southwest Shandong Province
Wang Lixiang
Liang Ying
Li Wenwen
Zhang Fujun
Fan Zhongxue
Abstract：In order to study the effects of conventional and organic planting and breeding modes on soil heavy metal contents and pollution characteristics,an experiment was conducted in typical organic and con-ventional wheat fields in Caoxian County,southwest of Shandong Province.The content differences of Cd,Cr, Pb,Cu and Zn in 0 ~20 cm upper soil layer were compared.In addition,the pollution levels of 5 kinds of heavy metals were assessed using single factor index method,Nemerow comprehensive pollution index method and potential ecological risk index method.The results showed that the contents of Cd,Pb,Cr,Cu and Zn in soil samples all met the national soil quality standard level I.The soil Cd,Pb and Cr contents under organic planting and breeding system were lower than those under conventional planting.Furthermore,the contents of Cu and Zn showed accumulation trends with the grown of organic planting and breeding years.The comprehen-sive pollution index evaluation results indicated that the heavy metal pollution degree in investigated regions were both in the alert level,and the difference between the two kinds of farming modes was not significant.The potential ecological risk index evaluation results showed that the investigated regions had light potential heavy metal ecological risk,and the organic planting and breeding system owned relatively lower ecological risk,but the difference was not significant .
Keywords：Organic planting and breeding modeConventional plantingSoil heavy metalPollution as-sessment
Publication Date：2016-07-31
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 80-84 )