文献类型：期刊文献

英文题名：Drought changes litter quantity and quality, and soil microbial activities to affect soil nutrients in moso bamboo forest

作者：Ge, Xiaogai[1,2] Wang, Cunguo[3] Wang, Lingling[4] Zhou, Benzhi[1,2] Cao, Yonghui[1,2] Xiao, Wenfa[5] Li, Mai-He[3,6,7]

第一作者：Ge, Xiaogai;葛晓改

通信作者：Zhou, BZ[1];Xiao, WF[2]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China;[2]Natl Forestry & Grassland Adm, Qianjiangyuan Forest Ecosyst Res Stn, Hangzhou 311400, Zhejiang, Peoples R China;[3]Northeast Normal Univ, Sch Geog Sci, Key Lab Geog Proc & Ecol Secur Changbai Mt, Minist Educ, Changchun 130024, Peoples R China;[4]Forestry & Water Conservancy Bur Fuyang Dist Hangz, Hangzhou 311400, Peoples R China;[5]Chinese Acad Forestry, Inst Forest Ecol Environm & Nat Conservat, Natl Forestry Adm, Key Lab Forest Ecol & Environm, Beijing 100091, Peoples R China;[6]Swiss Fed Inst Forest Snow & Landscape Res WSL, Zuercherstr 111, CH-8903 Birmensdorf, Switzerland;[7]Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Erguna Forest Steppe Ecotone Res Stn, Shenyang 110016, Peoples R China

年份：2022

卷号：838

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;EI(收录号：20222412220779);Scopus(收录号：2-s2.0-85131665959);WOS:【SCI-EXPANDED(收录号:WOS:000816989100003)】；

基金：This study was supported by the Fundamental Research Funds for the Central Non-profit Research Institution (CAFYBB2020ZE001 and CAFYBB2018SY015) , the National Natural Science Foundation of China (32071756) , Basic Public Welfare Research Project of Zhejiang Province (LGN21C030002) and Qianjiangyuan National Forest Ecological Research Station.

语种：英文

外文关键词：Drought; Litterfall; Litter quantity and quality; Litter decomposition rate; Drought adaptation; Soil microbial community

摘要：Drought would significantly influence the forest soils through changing the litterfall production and decomposition process. However, comprehensive in situ studies on drought effects in subtropical forests, especially in bamboo forests, have rarely been conducted. Here, we conducted a throughfall exclusion experiment with a rainfall reduction of ~80% in moso bamboo (Phyllostachys edulis) forests to investigate effects of drought on litter quantity, quality, soil microbial and enzyme activities, and soil nutrients across two years in subtropical China. We observed that throughfall exclusion (TE) treatment significantly decreased soil moisture by 63% compared to ambient control treatment (CK). Drought significantly decreased the annual litterfall in the second treatment year, and the leaf litter decomposition rate (-30% relative to CK) over 2 years of decomposition. TE treatment significantly decreased net release rate of litter carbon (C) and the amount of litter nitrogen (N) immobilization during a 360-day decomposition period, leading an increased litter C: N ratio in TE compared to CK. There was a distinct difference in soil microbial community composition between TE and CK treatments, showing higher bacteria biomass in TE but no difference in fungal biomass between TE and CK. Structural equation modelling revealed that drought decreased the contribution of litter quantity to soil nutrients but increased that of litter quality and soil microbial community to soil nutrients. Our results suggest that increasing drought events in subtropical China will directly reduce litterfall quantity and quality on the one hand, and alter the soil enzyme activities and microbial composition on the other hand, all of which will consequently decrease litter decomposition rate, soil nutrient availability, growth rate and productivity, leading to changes in the functioning and services of subtropical bamboo forests.