Quantification of soil aggregate microstructure on abandoned cropland during vegetative succession using synchrotron radiation-based micro-computed tomography

doi:10.1016/j.still.2016.08.007

	Quantification of soil aggregate microstructure on abandoned cropland during vegetative succession using synchrotron radiation-based micro-computed tomography
	Zhao, Dong 1,3; Xu, Mingxiang 1,2; Liu, Guobin 1; Yao, Xu 2; Tuo, Dengfeng 2; Zhang, Rongrong 2; Xiao, Tiqiao 4; Peng, Guanyun 4
刊名	SOIL & TILLAGE RESEARCH
	2017
卷号	165 页码:239-246
关键词	Aggregate microstructure Abandoned cropland Micro-computed tomography
ISSN号	0167-1987
DOI	10.1016/j.still.2016.08.007
通讯作者	Liu, Guobin(gbliu@ms.iswc.ac.cn)
英文摘要	Information for the microstructure of soil aggregates is crucial for understanding the mechanisms of various soil processes. The quantification of complex aggregate microstructure and its relationship to vegetative restoration, however, remains elusive. The objective of this study was to evaluate the impact of natural revegetation on aggregate microstructure using synchrotron-based X-ray micro-computed tomography and image analysis. Soil samples were collected from an active cropland and from four former croplands that have been abandoned for 6, 12, 23, and 32 years on the Loess Plateau, China. Soil aggregates (3-5 mm) were scanned at a voxel resolution of 3.25 pm, and the aggregate pore structure was visualized and quantified with ImageJ software. The stability of wet aggregates and other soil properties were also evaluated. The amount of soil organic carbon increased significantly and soil bulk density decreased significantly with abandonment age. Aggregate water stability was higher after revegetation but did not differ significantly among the abandoned sites. Total porosity, percentage of pores >75 mu m, and the fraction of elongated pores increased, but the number of pores, percentage of pores <75 mu m, and fractions of regular and irregular pores decreased after the croplands were abandoned. The fractal dimension, degree of anisotropy and the Euler number all indicated that aggregate microstructures were more connected and developed at all abandoned sites than in the active cropland, but the fractal dimension was more sensitive for monitoring the quality of the soil structure. The results from this study can help to improve our understanding of the soil processes during natural vegetative succession and of the importance of pore morphology in monitoring the quality of soil structure. (C) 2016 Elsevier B.V. All rights reserved.
资助项目	Special Program for Basic Research of the Ministry of Science and Technology, China[2014FY210100] ; Key Research Program of the Chinese Academy of Sciences[KJZD-EW-TZ-G10] ; National Natural Science Foundation of China[41171422] ; Shanghai Synchrotron Radiation Facility (SSRF)
WOS关键词	X-RAY CT ; LOESS PLATEAU ; LAND-USE ; ORGANIC-CARBON ; 3D VISUALIZATION ; CHINA ; RESTORATION ; STABILITY ; DYNAMICS ; TILLAGE
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000385901200027
资助机构	Special Program for Basic Research of the Ministry of Science and Technology, China ; Key Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; Shanghai Synchrotron Radiation Facility (SSRF)
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/66038]
专题	中国科学院地理科学与资源研究所
通讯作者	Liu, Guobin
作者单位	1.Chinese Acad Sci & Minist Water Resources, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, Yangling 712100, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, SSRF, Shanghai Inst Appl Phys Chinese, Shanghai 201204, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Dong,Xu, Mingxiang,Liu, Guobin,et al. Quantification of soil aggregate microstructure on abandoned cropland during vegetative succession using synchrotron radiation-based micro-computed tomography[J]. SOIL & TILLAGE RESEARCH,2017,165:239-246.
APA	Zhao, Dong.,Xu, Mingxiang.,Liu, Guobin.,Yao, Xu.,Tuo, Dengfeng.,...&Peng, Guanyun.(2017).Quantification of soil aggregate microstructure on abandoned cropland during vegetative succession using synchrotron radiation-based micro-computed tomography.SOIL & TILLAGE RESEARCH,165,239-246.
MLA	Zhao, Dong,et al."Quantification of soil aggregate microstructure on abandoned cropland during vegetative succession using synchrotron radiation-based micro-computed tomography".SOIL & TILLAGE RESEARCH 165(2017):239-246.