气候变化领域集成服务门户(CCPortal): Interspecific plant competition increases soil labile organic carbon and nitrogen contents

CCPortal

DOI	10.1016/j.foreco.2020.117991
	Interspecific plant competition increases soil labile organic carbon and nitrogen contents
	Wang M.; Yang J.; Gao H.; Xu W.; Dong M.; Shen G.; Xu J.; Xu X.; Xue J.; Xu C.-Y.; Zhou X.
发表日期	2020
ISSN	0378-1127
卷号	462
英文摘要	Plant competition can impose species-specific effects on the dynamics of soil carbon (C) and nitrogen (N) through rhizosphere processes and litter input. Therefore, it is crucial to quantify these effects in various terrestrial ecosystems for a better understanding of the mechanisms. Here, we collected subsoils containing low N from a subtropical forest and planted eight dominant tree species (two deciduous and six evergreens) in these soils in a greenhouse to explore the effects of interspecific plant competition on plant growth, soil C and N contents, and soil C and N mineralization rates after the plants had grown for 12 months. Soil labile organic C and N contents were represented by soil extractable organic C (EOC) and extractable organic N (EON) contents. We assessed the magnitude of the interspecific plant competition via the relative interaction intensity (RII) index, which was calculated from the biomass of seedlings in the mixed treatments compared with the single treatments. Our results showed that interspecific plant competition had species-specific effects on plant biomass and soil total C and N contents as well as soil C mineralization rates, whereas it tended to decrease soil N mineralization rates. However, interspecific plant competition significantly decreased plant C and N contents, and significantly increased soil EOC and EON contents with increasing RII. After classifying the communities into two functional types (i.e., deciduous–evergreen versus evergreen–evergreen), similar relationships were observed. These findings address the importance of quantifying interspecific plant competition on soil labile organic C and N contents, which is helpful for understanding soil C and N cycling in forest ecosystems. © 2020 Elsevier B.V.
关键词	Ecosystems Forestry Mineralogy Nitrogen Organic carbon Seed C mineralization Inter-specific competitions N mineralization rate Organic n Tree species Soils forest soil interspecific competition mineralization organic carbon rhizosphere soil carbon soil nitrogen subsoil subtropical region Biomass Competition Ecosystems Forestry Nitrogen Plants Soil
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132909
推荐引用方式 GB/T 7714	Wang M.,Yang J.,Gao H.,et al. Interspecific plant competition increases soil labile organic carbon and nitrogen contents[J]. Forest Ecology and Management,2020,462.
APA	Wang M..,Yang J..,Gao H..,Xu W..,Dong M..,...&Zhou X..(2020).Interspecific plant competition increases soil labile organic carbon and nitrogen contents.,462.
MLA	Wang M.,et al."Interspecific plant competition increases soil labile organic carbon and nitrogen contents".462(2020).