文献类型：期刊文献

英文题名：How do urban forests with different land use histories influence soil organic carbon?

作者：Xu, Xinhui[1,2,3] Wang, Cheng[1,2] Sun, Zhenkai[1,2] Hao, Zezhou[4] Day, Susan[5]

第一作者：Xu, Xinhui

通信作者：Wang, C[1];Sun, ZK[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[2]Natl Forestry & Grassland Adm, Urban Forest Res Ctr, Key Lab Tree Breeding & Cultivat, Beijing 100091, Peoples R China;[3]Guangdong Ecoengn Polytech, Guangzhou 510520, Peoples R China;[4]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Peoples R China;[5]Univ British Columbia, Vancouver, BC V6T 1Z4, Canada

年份：2023

卷号：83

外文期刊名：URBAN FORESTRY & URBAN GREENING

收录：;Scopus(收录号：2-s2.0-85151263132);WOS:【SSCI(收录号:WOS:000967990900001)，SCI-EXPANDED(收录号:WOS:000967990900001)】；

基金：Funding This work was supported by National Non -Profit Research In- stitutions of the Chinese Academy of Forestry (grant numbers: CAFYBB2020ZB008) and by the China Scholarship Council (CSC) (grant numbers: 201903270038) .

语种：英文

外文关键词：Historical land use; Labile soil organic carbon; Plant functional type; Soil organic carbon; Urban soils

摘要：Urban forests play a vital role in building soil organic carbon pools in urban areas. In many cases, urban forests are constructed on land previously used for agriculture, parks, or buildings. However, it is still being determined whether historical land use affects soil organic carbon (SOC) stocks in these forests. In this study, we asked: 1) How are SOC and its labile fractions (LOC) in urban forests affected by historical land use? and 2) How do SOC and LOC vary with time and vegetation type in urban forests built on land with different histories? We collected soil samples at three soil depths, 0-10, 10-20, and 20-30 cm, in 48 evergreen and 77 deciduous forest plots in 77 parks in Beijing, all built within the last 30 years. Plots represent two historical land use types, vegetated or non-vegetated, and three planting time classes, young (5-10 years), intermediate (11-20 years), and old (21-30 years). Our findings showed that there were significant differences between historical land use types in SOC and microbial organic carbon (MBC), this may be due to backfill soil before greening on non-vegetated land. Urban forests that were built on vegetated land accumulated SOC over time, while those on historically non-vegetated land did not. Evergreen forests had greater SOC and LOC than deciduous forests only on historically non-vegetated land. In addition, SOC and LOC were found to be negatively affected by increased soil bulk density. However, soil bulk density was not significantly different between both historical land use types and urban forest types. Overall, our study indicates that if SOC sequestration is a high priority in urban forests, cities could concentrate on more efficient management to increase SOC, such as soil rehabilitation and the use of evergreen tree species.