文献类型：期刊文献

英文题名：Relative contributions of leaf litter and fine roots to soil organic matter accumulation in mangrove forests

作者：Liu, Xiu[1,2,3] Xiong, Yanmei[2] Liao, Baowen[2]

第一作者：Liu, Xiu

通信作者：Xiong, YM[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Key Lab State Forestry Adm Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[3]Guangxi Acad Forestry, Nanning 530002, Peoples R China

年份：2017

卷号：421

期号：1-2

起止页码：493-503

外文期刊名：PLANT AND SOIL

收录：;Scopus(收录号：2-s2.0-85032976865);WOS:【SCI-EXPANDED(收录号:WOS:000417721600038)】；

基金：We thank Dr. Faming Wang for an internal review of this manuscript. This study was funded by the Chinese Academy of Forestry (RITFYWZX2015-03), the National Natural Science Foundation of China (41776103) and the State Forestry Administration of China (2017-LYPT-DW-127).

语种：英文

外文关键词：Coastal wetlands; Blue carbon; Soil carbon; Litter production; Litter decomposition; Fine roots

摘要：Mangrove above- and belowground litter contributes greatly to soil carbon (C) especially in systems with limited allochthonous input. This study aims to estimate the relative contributions of mangrove leaf litter vs. fine roots to the annually accumulated plant debris in the soil. Annual production of leaf litter and fine roots in four mono-specific mangrove forests was combined with their mass remaining after one year of decomposition to make the estimation. Annual fine root production was 2.2-5.1 times greater than leaf litter production, which ranged between 266 and 814 g m(-2). After 391 days of decomposition, 0-41% and 75-88% of leaf litter and fine root initial mass respectively remained. Only 5.9-69 months were expected for leaf litter to reach an approximately complete decomposition, in contrast to 111-655 months expected for fine roots. Annual plant detritus accumulation in the soil amounted to 405-2812 g m(-2), with leaf litter and fine roots contributing 2.5-7.6% and 92.4-97.5%, respectively. Fine roots are the dominant contributor to soil organic matter accumulation in mangroves due to high production and low decomposition rates. Management practices that foster fine root production are expected to accelerate soil C accumulation.