文献类型：期刊文献

英文题名：Forest structure characteristics on soil carbon and nitrogen storage of Pinus massoniana plantations in southern subtropic region

作者：Zhang, Kexin[1,2] Gao, Dongli[1,3] Guo, Hong[1] Zeng, Ji[4] Liu, Xianzhao[1,2]

第一作者：Zhang, Kexin

通信作者：Liu, XZ[1];Liu, XZ[2]

机构：[1]Chinese Acad Forestry, Res Inst Forest Resource Informat Tech, Beijing, Peoples R China;[2]Natl Forestry & Grassland Adm, Key Lab Forest Management & Growth Modeling, Beijing, Peoples R China;[3]Natl Forestry & Grassland Adm, Ind Dev & Planning Inst, Beijing, Peoples R China;[4]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang, Peoples R China

年份：2022

卷号：5

外文期刊名：FRONTIERS IN FORESTS AND GLOBAL CHANGE

收录：;Scopus(收录号：2-s2.0-85142037870);WOS:【SCI-EXPANDED(收录号:WOS:000885036800001)】；

基金：Funding This research was funded by the Fundamental Research Funds of CAF (CAFYBB2019ZB005) and the China National Key R&D Program during the 13th Five-year Plan Period (2016YFD060020501).

语种：英文

外文关键词：Pinus massoniana; forest structure; stand density; stand age; pure forest; mixed forest; soil carbon storage; soil nitrogen storage

摘要：Forest carbon and nitrogen storage significantly affect forest ecosystems and global carbon and nitrogen cycles. Forest management can achieve sustainable development by regulating stand structure. Therefore, the relationship between stand structure and soil carbon (SOCD) and nitrogen storage (SOND) needs in depth study. In this study, experiments were carried out in mixed and pure Pinus massoniana forests to analyze the effects of stand density, stand age, and their interaction on the change trends in SOCD and SOND in different soil layers. The results showed that, in upper (0-20 cm), middle (20-40 cm), and lower (40-60 cm) soil layers, with increased stand density, the SOCD of pure P. massoniana stands first increased and then decreased, while SOND increased monotonically; in mixed P. massoniana stands, SOCD and SOND both increased monotonically. In different development stages (young, middle-aged, and near-mature), the average SOCD of pure P. massoniana stands were 91.31, 88.56, and 85.98 t/ha, respectively, while the average SOCD of mixed P. massoniana stands were 55.92, 48.61, and 55.05 t/ha. The SOCD of pure P. massoniana stands was significantly higher than mixed P. massoniana stands at all growth and development stages. In pure P. massoniana stands, with increasing stand density, the SOCD of young, middle-aged, and near-mature stands first increased and then decreased, while the SOND increased monotonically. In the mixed P. massoniana stands, with increasing stand density, the SOCD of young, middle-aged, and near-mature stands increased monotonically, while the SOND of young stands increased initially and then decreased, while those of middle-aged and near-mature stands increased monotonically. These results emphasized that the artificial regulation of stand density at the appropriate development stage can maximize the carbon and nitrogen fixation potential of forest soil.