Decomposition of labile and recalcitrant coniferous litter fractions affected by temperature during the growing season

作     者：Veronika Jílková Kristyna Dufková Tomás Cajthaml Veronika Jílková;Krist(y)na Dufková;Tomá(s) Cajthaml

作者机构：Na Sádkách 7CeskéBudějovice 37005Czech Republic Faculty of ScienceMasaryk UniversityKotlárská267/2Brno 61137Czech Republic Institute for Environmental StudiesCharles University in PragueBenátská2Prague 12801Czech Republic Institute of MicrobiologyCzech Academy of SciencesVídeňská1083Prague 14220Czech Republic 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2020年第31卷第4期

页      面：1115-1121页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：This study was supported by the Czech Academy of Sciences(L200961602,MSM200961606,Otevrená věda,fellowship No.1.062) by the European Regional Development Fund-Project"Research of key soil water ecosystem interactions at the SoWa Research Infrastructure"(No.CZ.02.1.01/0.0/0.0/16_013/0001782) 

主　　题：Temperate forest Picea abies Soil respiration Hot water-extractable carbon PLFA (phospholipid fatty acids) 

摘      要：Temperate coniferous forest soils are considered important sinks of soil organic carbon(C).Fresh C inputs may,however,affect soil microbial activity,leading to increased organic matter decomposition and carbon dioxide *** consists of labile and recalcitrant fractions which are thought to be utilized by distinct microbial communities and at different rates during the growing *** this study,we incubated the whole litter(LC+RC),the labile(LC)and the recalcitrant(RC)fractions with the coniferous soil at two temperatures representing spring/autumn(10℃)and summer(20℃)for one *** respiration and microbial community composition were regularly determined using phospholipid fatty acids as *** LC fraction greatly increased soil respiration at the beginning of the incubation period but this effect was rather *** effect of the RC fraction persisted longer and,together with the LC+RC fraction,respiration increased during the whole incubation *** of the RC fraction was more strongly affected by higher temperatures than decomposition of the more labile fractions(LC and LC+RC).However,when we consider the relative increase in soil respiration compared to the dH2 O treatment,respiration increased more at a lower temperature,suggesting that available C is more important for microbial metabolism at lower *** C was added only once in our study,no changes in microbial community composition were detected,possibly because the microbial community is adapted to relatively low amounts of additional C such as the amounts naturally found in litter.