Journal of Guangxi Normal University(Natural Science Edition) ›› 2012, Vol. 30 ›› Issue (2): 127-131.

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Effect of Low Molecular Weight Organic Acids on Cd and Zn Absorption of Rape

TANG Yu-ting, HUANG Jia-yu, WANG Wei-sheng, ZHANG Chao-lan   

  1. College of Environment,Guangxi University,Nanning Guangxi 530004,China
  • Received:2012-02-24 Online:2012-06-20 Published:2018-12-03

Abstract: The effects of mixed low-molecular-weight-organic-acids (LMWOAs,acetic acid,formic acid,malic acid and citric acid) on the absorption of Cd and Zn of rape were studied in contaminated soil through pot experiments.The results showed that with the increasing amount of LMWOAs,the amounts ofCd and Zn in rape shoot exhibited complex changes.LMWOAs could increase the amounts of Cd and Zn in B1 and B2 fractions of rhizosphere soil (except Cd in B1 fractions),however,LMWOAs had little effect on Cd and Zn in nonrhizosphere soils.Underthe stress condition of Cd or Zn,low concentration of LMWOAs could decrease the toxicity of Cd or Zn and increase the biomass of rape.However,high concentration of LMWOAs could increase the amount of Cd or Zn in B1 and B2 fractions of rhizospheresoil,increase the toxicity of Cd or Zn,so as to restrain the growth of rape.

Key words: rhizosphere, low-molecular-weight-organic-acids, heavy metal, Zn, Cd

CLC Number: 

  • Q945.78
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