Soil Acidification in Response to Acid Deposition in Three Subtropical Forests of Subtropical China

Long-term changes in soil pH, the current status of soil acidification, and the response of bulk soil and soil water pH to experimental nitrogen addition under three subtropical forests were investigated in Dinghushan Biosphere Reserve of subtropical China. The results showed that the mineral soil p...

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Bibliographic Details
Published in:Pedosphere 2010-06, Vol.20 (3), p.399-408
Main Authors: LIU, Ke-Hui, FANG, Yun-Ting, YU, Fang-Ming, LIU, Qiang, LI, Fu-Rong, PENG, Shao-Lin
Format: Article
Language:English
Subjects:
Acid deposition
forest succession
nitrogen addition
soil pH
亚热带森林
土壤pH值
土壤水分
大气酸沉降
演替阶段
酸化反应
长期变化
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Summary:Long-term changes in soil pH, the current status of soil acidification, and the response of bulk soil and soil water pH to experimental nitrogen addition under three subtropical forests were investigated in Dinghushan Biosphere Reserve of subtropical China. The results showed that the mineral soil pH at 0-20 cm depth declined significantly from 4.60-4.75 in 1980s to 3.84-4.02 in 2005. Nitrogen addition resulted in the decrease of pH in both bulk soil and soil water collected at 20-cm depth. The rapid decline of soil pH was attributed to long-term high atmospheric acid deposition （nitrogen and sulphur） therein. The forest at earlier succession stage with originally higher soil pH appeared to be more vulnerable to acid deposition than that at later succession stage with originally low soil pH.
ISSN:1002-0160
2210-5107
DOI:10.1016/S1002-0160(10)60029-X