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Volume 37 Issue 3
Jun.  2018
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Article Navigation >  CARSOLOGICA SINICA  > 2018  >  37(3): 336-342
LIU Wei, ZHOU Yunchao, ZHANG Chunlai. Response of base cations migration of lime soil to simulated acid rain[J]. CARSOLOGICA SINICA, 2018, 37(3): 336-342. doi: 10.11932/karst20180303
Citation: LIU Wei, ZHOU Yunchao, ZHANG Chunlai. Response of base cations migration of lime soil to simulated acid rain[J]. CARSOLOGICA SINICA, 2018, 37(3): 336-342. doi: 10.11932/karst20180303
shu

Response of base cations migration of lime soil to simulated acid rain

doi: 10.11932/karst20180303
  • 1.

    College of Forestry,Guizhou University, Guiyang/Research Center of Forest Resources and Environment in Guizhou Province

  • 2.

    Institute of Karst Geology, CAGS/Key Laboratory of Karst Dynamics, MNR&GZAR/The International Research Center on Karst under the Auspices of UNESCO

  • Publish Date: 2018-06-25
    Abstract
  • In order to reveal the characteristics of soil base cations migration and their buffering properties under the influence of simulated acid rain in lime soil, we have made a simulation test of acid rain leaching on lime soil of karst areas. Results show that there is no significant difference in the amount of ionic migration of lime soil under rainfall of pH=3.5, 4.5 and 5.5, indicative of a strong buffering capacity to acid rain. During the simulation period, the release of Ca2+is significantly linearly related to the release of Mg2+. In addition, soil thickness has a remarkable influence on the acid resistance of lime soil. The thicker the soil, the greater the resistance, and vice versa. Then the leaching rate of soil thickness ratio 1∶2.5∶5 base ion is analyzed. Results show that the leaching losses are 1∶1.43∶2.06 for K+,1∶1.63∶3.13 for Ca2+, and 1∶1.64∶3.15 for Mg2+, respectively. The increase of soil thickness can greatly reduce the leaching of acid rain to the baseions. While lime soil surface cover has a different expression, in which base cations are different in migration and leaching, but do not have significant effect on soil acidification

     

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