干旱区生态环境知识资源中心(Arid): Contrasting Responses of Soil Inorganic Carbon to Afforestation in Acidic Versus Alkaline Soils

Arid

DOI	10.1029/2021GB007038
	Contrasting Responses of Soil Inorganic Carbon to Afforestation in Acidic Versus Alkaline Soils
	Hong, Songbai; Chen, Anping
通讯作者	Chen, AP
来源期刊	GLOBAL BIOGEOCHEMICAL CYCLES
ISSN	0886-6236
EISSN	1944-9224
出版年	2022
卷号	36 期号:1
英文摘要	Afforestation is recommended as an effective approach for carbon sequestration and environmental benefits. However, it remains less clear, and sometimes controversial, regarding how afforestation may impact soil inorganic carbon (SIC), a crucial component of the ecosystem carbon pool. Using field data from 619 afforested plots and 163 control plots across northern China, we here investigated the relative and absolute differences in SIC between afforested and corresponding control plots. Our results suggested that afforestation increased SIC in acidic soils, while decreased SIC in alkaline soils. Fitting a linear mixed model and further a structure equation model, we found that afforestation-induced soil pH change was the most significant factor regulating SIC responses. In particular, SIC was more sensitive to pH change in more arid areas, where both soil pH and SIC stocks were high. Other factors could indirectly affect SIC responses to afforestation through modulating soil pH and soil organic carbon (SOC) dynamics. Moreover, afforestation-induced SIC changes also varied considerably among different species of tree plantations and across different soil depths. Importantly, in plantations of Pinus sylvestris var. mongholica, Pinus tabuliformis, and Populus spp., changes in SIC caused by afforestation were even comparable to that in SOC. Overall, our findings provide a data-based understanding on the comprehensive soil carbon dynamics following afforestation and its underlying mechanisms. With the increased use of afforestation and reforestation as nature-based solutions to climate change, their associated impacts on SIC need to be taken into account, especially in SIC-rich areas.
英文关键词	plant-soil interactions soil carbon soil pH structural equation model nature-based solution
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000751223100009
WOS关键词	NITROGEN DEPOSITION ; FOREST BIOMASS ; CLIMATE-CHANGE ; PH ; CHINA ; SEQUESTRATION ; NEOFORMATION ; CONSERVATION ; EMISSIONS ; BALANCE
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376731
推荐引用方式 GB/T 7714	Hong, Songbai,Chen, Anping. Contrasting Responses of Soil Inorganic Carbon to Afforestation in Acidic Versus Alkaline Soils[J],2022,36(1).
APA	Hong, Songbai,&Chen, Anping.(2022).Contrasting Responses of Soil Inorganic Carbon to Afforestation in Acidic Versus Alkaline Soils.GLOBAL BIOGEOCHEMICAL CYCLES,36(1).
MLA	Hong, Songbai,et al."Contrasting Responses of Soil Inorganic Carbon to Afforestation in Acidic Versus Alkaline Soils".GLOBAL BIOGEOCHEMICAL CYCLES 36.1(2022).