文献类型：期刊文献

英文题名：Divergent contribution of microbial- and plant-derived carbon to soil organic carbon in Moso bamboo forests left unmanaged

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：Zhou, BZ[1]

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：233

外文期刊名：CATENA

收录：;Scopus(收录号：2-s2.0-85168830871);WOS:【SCI-EXPANDED(收录号:WOS:001066971800001)】；

基金：This work was supported by the National Key Research and Development Program of China (No. 2021YFD220040205) and partially by the Leading Goose Project of Science Technology Department of Zhejiang Province (No. 2023C02035).

语种：英文

外文关键词：Soil organic matter; Microbial necromass; Plant residues; Lignin phenol; Amino sugar

摘要：Moso bamboo (Phyllostachys pubescens) has a high carbon (C) sequestration capacity that can help mitigate global climate change. However, owing to strengthened environmental protection policies and rising labor costs, large areas of Moso bamboo forests have been left unmanaged after long-term intensive management. Consequently, the contribution of plant- and microbial-derived C as part of soil organic carbon (SOC) has not been reported in Moso bamboo forests. Here, we investigated the change of microbial necromass and plant-derived components in Moso bamboo forests with different unmanaged chronosequences (i.e., intensively managed currently or unmanaged for 2-5, 7-10, or 11-14 years), using biomarker. We observed that plant-derived C was significantly higher in unmanaged than in intensively managed forests and that the highest content was found in the forests left unmanaged for 7-10 years (3.69 g kg-1). No significant differences in microbial-derived C content were observed between Moso bamboo forests under intensive management and those left unmanaged for 2-5 years. However, compared with intensive management, left unmanaged for 7-10 and 11-14 years significantly increased microbial-derived C content. Overall, the quantitative importance of microbial-derived C as part of SOC was higher than that of plant-derived C (28.7-42.62 % vs 8.88-20.8 %, respectively). Moreover, we found that the major determinants of microbial- and plant-derived C were different. For microbial-derived C accumulation, plant biomass, total nitrogen, total phosphorus, and soluble organic C were the dominant factors, and for plant-derived C accumulation, soil cation exchange capacity was the dominant factor. These findings provide new information about the changes in SOC accumulation in Moso bamboo forests left unmanaged and highlight the different accumulation mechanisms of plant- and microbial-derived C.