文献类型：期刊文献

英文题名：Microbial pathways driving stable soil organic carbon change in abandoned Moso bamboo forests in southeast China

作者：Xu, Yaowen[1,2] Ge, Xiaogai[1,2] Gao, Ge[1,2] Yang, Yuhao[1,2,3] Hu, Yutao[1,2,3] Li, Zhengcai[1,2] Zhou, Benzhi[1,2]

第一作者：Xu, Yaowen

通信作者：Li, ZC[1];Zhou, BZ[1];Li, ZC[2];Zhou, BZ[2]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Peoples R China;[2]Natl Forestry & Grassland Adm China, Qianjiangyuan Forest Ecosyst Res Stn, Hangzhou 311400, Peoples R China;[3]Northeast Forestry Univ, Coll Forestry, Harbin 150040, Peoples R China

年份：2023

卷号：345

外文期刊名：JOURNAL OF ENVIRONMENTAL MANAGEMENT

收录：;EI(收录号：20233914812572);Scopus(收录号：2-s2.0-85172280912);WOS:【SCI-EXPANDED(收录号:WOS:001077178600001)】；

基金：This study was supported by the National Key Research and Devel- opment Program of China (No. 2021YFD220040205) , the Leading Goose Project of Science Technology Department of Zhejiang Province (No. 2023C02035) , and the principal project from Zhejiang Adminis- tration Department of Public Forests and State Forest Farms (GYLZ- 202301) .

语种：英文

外文关键词：Mineral-associated organic carbon; Amino sugars; Microbial residues; Microbial carbon pump; Stability

摘要：Mineral-associated organic carbon (MOC) is a stable component of the soil carbon (C) pool, critical to realize carbon sequestration and coping with climate change. Many Moso bamboo (Phyllostachys edulis) forests in subtropical and tropical areas that used to be intensively managed have been left unmanaged. Still, studies on MOC changes occurring during the transition from intensive management to unmanagement are lacking. Besides, the understanding of the role of microorganisms in MOC accumulation is far from satisfactory. Based on the combination of field investigation and laboratory analysis of 40 Moso bamboo forest sampling plots with different unmanaged chronosequence's in southeast China, we observed the MOC content in Moso bamboo forests left unmanaged for 2-5 years had decreased, whereas that in forests left unmanaged for 11-14 years had increased compared with that in intensively managed forests. Specifically, the MOC contents in forests left unmanaged for 11-14 years were significantly higher than in those under intensive management or unmanaged for 2-5 years. Moreover, we found that microorganisms drove MOC change through two different pathways: (i) more microorganisms led to more soil nutrients, which led to more amino sugars, ultimately resulting in the accumulation of MOC, and (ii) microorganisms promoted the accumulation of MOC by influencing the content of metal oxides (poorly crystalline aluminum oxides and free aluminum oxides). We believe that ignoring the interaction between microorganisms and metal oxides may lead to uncertainty in evaluating the relative contribution of microbial residues to MOC.