文献类型：期刊文献

英文题名：Soil organic carbon fractions, C-cycling associated hydrolytic enzymes, and microbial carbon metabolism vary with stand age in Cunninghamia lanceolate (Lamb.) Hook plantations

作者：Wang, Chaoqun[1,2,3,5] Xue, Lin[4] Jiao, Ruzhen[1,2,3]

第一作者：Wang, Chaoqun

通信作者：Jiao, RZ[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[2]State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[3]State Forestry Adm, Key Lab Tree Breeding & Cultivat, Beijing 100091, Peoples R China;[4]Univ Gottingen, Fac Geosci & Geog, D-37077 Gottingen, Germany;[5]Univ Gottingen, Dept Biogeochem Agroecosyst, D-37077 Gottingen, Germany

年份：2021

卷号：482

外文期刊名：FOREST ECOLOGY AND MANAGEMENT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000617951300003)】；

基金：The present study was supported by the State Key Research Development Program of China (2016YFD0600302).

语种：英文

外文关键词：Soil organic carbon; Microbial carbon metabolism; Extracellular enzymes; Plantation development

摘要：Empirical evidence of the contemporaneous variations in soil organic carbon (SOC) fractions, C-cycling associated hydrolytic enzyme activities, and microbial carbon metabolism during the development of plantations has not been satisfactorily documented. Microbial activity and extracellular enzymes play a crucial role in driving biogeochemical processes, yet the mechanisms by which biotic and abiotic factors interact influence SOC fractions remain unclear. In this study, we evaluated the changes in the SOC, microbial biomass carbon (MBC), easily oxidizable carbon (EOC), and dissolved organic carbon (DOC), the invertase, cellulase, and beta-glucosidase activities, and microbial carbon metabolism activities at the soil depths of 0-20 cm, 20-40 cm, and 40-60 cm in 6- (6a), 12- (12a), 18- (18a), 25- (25a), 32- (32a), and 49-year-old (49a) Chinese fir plantations. Overall, the SOC fractions, three enzyme activities, and microbial carbon metabolism decreased from 6a to 12a, 18, or 25a, and then increased in 32a and 49a, but the DOC at the 0-20 cm and 20-40 cm soil depths generally increased with stand age across all six stand ages. The SOC fractions, enzyme activities, and microbial activities were higher in both May and September than in January. The concentrations of SOC, MBC, EOC, DOC were positively correlated with the activities of three enzymes and the microbial Shannon diversity. Altogether these findings indicate that microorganisms and extracellular enzymes are sensitive to SOC dynamics with stand age and that to understand SOC dynamics, we need to consider the multiple factors of forest ecosystems.