Water, Air, and Soil Pollution

, Volume 108, Issue 3–4, pp 377–390 | Cite as

Changes in pH, CEC and Exchangeable Acidity of Some Forest Soils in Southern China During the Last 32–35 Years

  • Zhaohua Dai
  • Yunxia Liu
  • Xingjun Wang
  • Dianwu Zhao

Abstract

Soil acidification has been occurred in two locations in southern China. The changes in soil pH during a 35 yr period has been about 1.0 pH 2O) units, and about 0.58–0.71 pH (KCl) units at Wuming in Guangxi Zhuang Autonomous Region and Zhurongfeng of Mt. Heng in Hunan Province. A decrease in CEC and BS and an increase in hydrogen and aluminum ion concentrations were found in the acidified soils, and related to the acidification caused by acid deposition. Hydrogen ion concentration increased about 0.1–1.0 × 10-6 equivalent g-1 soil yr-1. Cation exchangeable capacity (CEC) and base saturation (BS) decreased to 53–76 and 30–59% in the acidified soils respectively, and an increase in exchangeable acidity also occurred. Acidification in the topsoil is higher than in the subsoil.

CEC exchangeable acidity pH soil acidification southern China 

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Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Zhaohua Dai
    • 1
  • Yunxia Liu
    • 1
  • Xingjun Wang
    • 1
  • Dianwu Zhao
    • 1
  1. 1.Research Center for Eco-Environmental SciencesChinese Academy of SciencesChina

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