Chin J Plan Ecolo ›› 2013, Vol. 37 ›› Issue (2): 142-149.doi: 10.3724/SP.J.1258.2013.00015

• Research Articles • Previous Articles     Next Articles

Effects of understory removal on forest carbon storage in Cinnamomum camphora plantation ecosystem

WU Ya-Cong, LI Zheng-Cai*, CHENG Cai-Fang, LIU Rong-Jie, WANG Bin, and GERI Le-Tu   

  1. Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang, Zhejiang 311400, China
  • Received:2012-10-09 Revised:2013-01-14 Online:2013-01-31 Published:2013-02-01
  • Contact: LI Zheng-Cai E-mail:lizccaf@126.com

Abstract:

Aims Our objective was to document the effects of different forest management strategies on carbon storage in both vegetation and soil in a Cinnamomum camphora plantation.
Methods We investigated the biomass of trees, shrubs, herb and the litter layer to calculate the carbon storage of vegetation and collected soil samples of 0–60 cm depth to analyze the soil carbon storage in a C. camphora plantation.
Important findings The carbon storage of vegetation was higher in understory removal stands than that of non-removal stands, with an increase of 48.87% and an increment of 0.62 t·hm–2·a–1. The soil carbon content was lower when the understory vegetation was removed, with a significant decrease ranging from 4.79% to 34.13%, and a significant decline of 10.16 g·kg–1 and 8.58 g·kg–1 in the 0–10 and 10–20 cm layers, respectively (p < 0.05). Carbon storage in soil was reduced by understory removal treatment in each interval of 0–60 cm depth with a decrease ranging from 1.98% to 43.45% and an especially sharp decline of 15.39 t·hm–2 and 11.58 t·hm–2 in 0–10 cm (p < 0.01) and 10–20 cm (p < 0.01) layers, respectively. However, the total forest carbon storage in the C. camphora plantation was not significantly reduced by understory removal treatment. Therefore, understory removal contributed to the accumulation of carbon storage in vegetation, but lowered the soil carbon content and storage.

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