Changes in soil organic and inorganic carbon stocks in deep profiles following cropland abandonment along a precipitation gradient across the Loess Plateau of China

doi:10.1016/j.agee.2018.02.006

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Changes in soil organic and inorganic carbon stocks in deep profiles following cropland abandonment along a precipitation gradient across the Loess Plateau of China
	Han, Xiaoyang 1,2; Gao, Guangyao 1,2; Chang, Ruiying3 ; Li, Zongshan 1; Ma, Ying 4; Wang, Shuai ; Wang, Cong 1; Lu, Yihe 1,2; Fu, Bojie 1,5
刊名	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
	2018-04-15
卷号	258 页码:1-13
关键词	SOC and SIC Shallow and deep layers Precipitation gradient Vegetation restoration Loess Plateau
ISSN号	0167-8809
DOI	10.1016/j.agee.2018.02.006
英文摘要	Determining changes in soil organic carbon (SOC) and inorganic carbon (SIC) stocks following ecological restoration is important for estimating the regional carbon budget and evaluating ecological effects. However, there is limited understanding on the interacting effects of vegetation restoration and climate gradients on SOC and SIC stocks in shallow and deep soil layers over large scales. This study selected seven sites along a climate transect from the east to the west of the Chinese Loess Plateau, and the SOC and SIC stocks were measured to a depth of 300 cm in sites covered by cropland and three vegetation restoration types (grassland, shrubland and woodland). The spatial variations and controlling factors of the SOC and SIC stocks at different depths following vegetation restoration along the precipitation gradient were investigated in detail. The results indicated that the SOC and SIC stocks in the 100-300 cm layers accounted for more than 50% of the total values in the 0-300 cm profile. The total SOC stock in the 0-300 cm profiles significantly increased along precipitation gradient (p < 0.01) in all vegetation types except woodland. The total SIC stock decreased, but the change was not significant, which caused little variation in the total carbon stocks along the precipitation gradient (p > 0.05). Shrubland and woodland plantation following cropland abandonment resulted in soil carbon accumulation, whereas grassland represented carbon loss in sites with mean annual precipitation (MAP) greater than 470 mm. The changes in the SOC stock (ASOC) in the surface layer (0-20 cm) and those in the SIC stock (ASIC) in the deep layers (100-300) following revegetation significantly decreased along precipitation gradient (p < 0.05). The interactions between Delta SOC and Delta SIC stocks were evident, especially in the upper soil layers. An accumulation of 1 kg SOC was accompanied by 0.73 kg loss of SIC in the 0-40 cm layer and 1.26 kg increase of SIC in the 40-300 cm layer per square meter following revegetation. MAP and mean annual temperature (MAT) mainly affected the spatial patterns of SOC and SIC in the upper layers, while land use and soil texture mainly affected soil carbon in the deep layers. This study indicates that vegetation restoration does not always result in soil carbon sequestration at every depth after cropland abandonment, which depends on climatic conditions and varies among different vegetation types.
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000429394600001
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/22933]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Gao, Guangyao
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 2.Joint Ctr Global Change Studies, Beijing 100875, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 5.Beijing Normal Univ, Fac Geog Sci, State Key Lab Bards Surface Proc & Resources, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Han, Xiaoyang,Gao, Guangyao,Chang, Ruiying,et al. Changes in soil organic and inorganic carbon stocks in deep profiles following cropland abandonment along a precipitation gradient across the Loess Plateau of China[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2018,258:1-13.
APA	Han, Xiaoyang.,Gao, Guangyao.,Chang, Ruiying.,Li, Zongshan.,Ma, Ying.,...&Fu, Bojie.(2018).Changes in soil organic and inorganic carbon stocks in deep profiles following cropland abandonment along a precipitation gradient across the Loess Plateau of China.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,258,1-13.
MLA	Han, Xiaoyang,et al."Changes in soil organic and inorganic carbon stocks in deep profiles following cropland abandonment along a precipitation gradient across the Loess Plateau of China".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 258(2018):1-13.