文献类型：期刊文献

英文题名：Fine root functional group based estimates of fine root production and turnover rate in natural mangrove forests

作者：Xiong, Yanmei[1] Liu, Xiu[1,2] Guan, Wei[1] Liao, Baowen[1] Chen, Yujun[1] Li, Mei[1] Zhong, Cairong[3]

第一作者：熊燕梅

通信作者：Xiong, YM[1]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[2]Guangxi Forestry Res Inst, Nanning 530002, Peoples R China;[3]Dongzhai Harbor Natl Nat Reserve, Haikou 571129, Peoples R China

年份：2017

卷号：413

期号：1-2

起止页码：83-95

外文期刊名：PLANT AND SOIL

收录：;Scopus(收录号：2-s2.0-84991627609);WOS:【SCI-EXPANDED(收录号:WOS:000399019600007)】；

基金：We thank Jianhai Chen for his assistance in the field. We thank Dr. Jiacun Gu for constructive suggestions on manuscript preparation and Drs. Deliang Kong and Donna Devlin for helpful comments on an earlier draft of the manuscript. Thanks to two anonymous reviewers for their constructive comments that greatly improved the manuscript. This work was supported by the Chinese Academy of Forestry (RITFYWZX2015-03), the Forestry Administration of Guangdong (2014KJCX021-01) and the State Forestry Administration of China (2016-LYPT-DW-130).

语种：英文

外文关键词：Fineroot biomass; Fine root dynamics; Root branching order; Seasonal pattern mangroves wetland

摘要：It has been increasingly recognized that only distal lower order roots turn over actively within the < 2 mm fine root system of trees. This study aimed to estimate fine root production and turnover rate based on lower order fine roots and their relations to soil variables in mangroves. We conducted sequential coring in five natural mangrove forests at Dongzhai Bay, China. Annual fine root production and turnover rate were calculated based on the seasonal variations of the biomass and necromass of lower order roots or the whole fine root system. Annual fine root production and turnover rate ranged between 571 and 2838 g m(-2) and 1.46-5.96 yr(-1), respectively, estimated with lower order roots, and they were increased by 0-30 % and reduced by 13-48 %, respectively, estimated with the whole fine root system. Annual fine root production was 1-3.5 times higher than aboveground litter production and was positively related to soil carbon, nitrogen and phosphorus concentrations. Fine root turnover rate was negatively related to soil salinity. Mangrove fine root turnover plays a more important role than aboveground litter production in soil C accumulation. Sites with higher soil nutrients and lower salinity favor fine root production and turnover, and thus favor soil C accumulation.