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Journal of Forestry Research

, Volume 16, Issue 3, pp 205–208 | Cite as

Concentrations and seasonal dynamics of dissolved organic carbon in forest floors of two plantations (Castanopsis kawakamii andCunninghamia lanceolata) in subtropical China

  • Zhang Jiang-shan
  • Guo Jian-fen
  • Chen Guang-shui
  • Qian Wei
Article

Abstract

The concentrations and seasonal dynamics of DOC in forest floors of monoculture plantations ofCastanopsis kawakamii and Chinese fir (Cunninghamia lanceolata) were assessed in Sanming, Fujian, China (26°11′30″N, 117°26′00″E). Forest floor samples were taken in January, April, July and October in 2002 and divided into undecomposed material (horizon Oi), partially decomposed organic material (horizon Oe), and fully decomposed organic material (horizon Oa). Upon collection, DOC concentrations of samples were analyzed by a High Temperature TOC. The results showed that the annual average DOC concentration of Chinese fir (1341.7 mg·kg−1) in the forest floor was higher than that ofCastanopsis kawakamii (1178.9 mg·kg−1). Difference in DOC concentrations was observed among three horizons of the forest floor. DOC concentration of forest floor in the two forests was the highest in horizon Oe. Seasonal trends of DOC concentrations in different horizons of forest floors were similar and the maximal value occurred in autumn (or winter). The concentration and temporal change of DOC in studied forests were probably related to the variation in moisture, temperature, biological activity and quantity of organic matter in the forest floor.

Keywords

Dissolved organic carbon (DOC) Seasonal dynamics Forest floor Castanopsis kawakamii Cunninghamia lanceolata Monoculture plantation 

CLC number

S715.9 S791.27 

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Copyright information

© Northeast Forestry University 2005

Authors and Affiliations

  • Zhang Jiang-shan
    • 1
  • Guo Jian-fen
    • 2
  • Chen Guang-shui
    • 2
  • Qian Wei
    • 2
  1. 1.Research Institute of Environmental ScienceFujian Normal UniversityFuzhouP.R. China
  2. 2.Key Laboratory of Subtropical Resources and Environments of Fujian ProvinceFuzhouP.R. China

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