文献类型：期刊文献

英文题名：Effects of understory removal on root production, turnover and total belowground carbon allocation in Moso bamboo forests

作者：Tang, Xiaolu[1] Fan, Shaohui[1] Qi, Lianghua[1] Guan, Fengying[1] Liu, Guanglu[1] Du, Manyi[2]

第一作者：Tang, Xiaolu

通信作者：Fan, SH[1]|[a000544a2d11f077bd3d5]范少辉;

机构：[1]Int Ctr Bamboo & Rattan, Key Lab Bamboo & Rattan Sci, Beijing 100102, Peoples R China;[2]Chinese Acad Forestry, Expt Ctr Forestry North China, 1 Shuizaxilu, Beijing 102300, Peoples R China

年份：2016

卷号：9

期号：APR2016

起止页码：187-194

外文期刊名：IFOREST-BIOGEOSCIENCES AND FORESTRY

收录：;Scopus(收录号：2-s2.0-84964509984);WOS:【SCI-EXPANDED(收录号:WOS:000378110000001)】；

基金：This study was supported by the "948 project" of the State Forest Administration (2013-4-70), the special research fund of the International Center for Bamboo and Rattan (1632013010), the Special Funds for Forestry Public Industry Research (201104 008). The authors would like to thank Qing-biao Xu for carrying fieldwork and lab work, and Jin Yu, Chuxin Shen for support of fieldwork. We would like to express our thanks to the anonymous reviewers whose suggestions contributed to improve the manuscript.

语种：英文

外文关键词：Fine Root; Coarse Root; Production; TBCA; Moso Bamboo Forest

摘要：Although the role of roots has been highlighted in carbon and nutrient cycles in forest ecosystems, root production, turnover and total belowground carbon allocation (TBCA) under different management regimes in Moso bamboo forests have not been determined to date. In this study, sequential soil cores were collected at two soil depths (0-20 cm and 20-40 cm) to assess the effects of understory removal on root production, turnover, and TBCA in Moso bamboo forests in subtropical China. A total of 1080 sequential soil cores were collected from April 2011 to March 2012. Understory removal significantly reduced fine root biomass and production for both soil layers (p < 0.05). Total fine root biomass was 781.9, 419.2, and 638.7 g m(-2) for an unmanaged stand (stand I), pesticide-treated stand (stand II), and hand-weeded stand (stand III), and fine root production was 467.5, 235.1, and 321.6 g m(-2) a(-1), respectively. Understory removal did not significantly affect fine root turnover (0.5-0.6 a(-1)). Fine root turnover showed a strong relationship with fine root production, but not with fine root biomass, indicating that fine root production was the main driver of fine root turnover. TBCA calculated from the component cumulative approach was in order of stand I (481.9 g C m(-2) a(-1)) > stand II (457.7 g C m(-2) a(-1)) > stand III (404.9 g C m(-2) a(-1)), though the differences were not statistically significant (p > 0.05). However, TBCA calculated from the mass balance approach showed a reverse trend compared to the component cumulative approach. The TBCA of stand III was significantly higher than that of stand I and stand II (p < 0.05), demonstrating that the belowground process is complex and standardizing the method of estimation of TBCA is extremely important in global carbon cycle modeling.