Effect of vegetation type on microstructure of soil aggregates on the Loess Plateau, China

doi:10.1016/j.agee.2017.03.014

	Effect of vegetation type on microstructure of soil aggregates on the Loess Plateau, China
	Zhao, Dong 1,3; Xu, Mingxiang 1,2; Liu, Guobin 1; Ma, Luyang 2; Zhang, Shengmin 2; Xiao, Tiqiao 4; Peng, Guanyun 4
刊名	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
	2017-05-01
卷号	242 页码:1-8
关键词	Aggregate pore Micro-computed tomography Soil organic matter Soil texture Vegetation restoration
ISSN号	0167-8809
DOI	10.1016/j.agee.2017.03.014
通讯作者	Xu, Mingxiang(xumx@nwsuaf.edu.cn) ; Liu, Guobin(gbliu@ms.iswc.ac.cn)
英文摘要	Several types of vegetation restoration have been implemented on the Loess Plateau in China to control soil erosion and improve soil quality. Different revegetation types, however, have varying effects on soil structure; effects on the pore network of aggregates are especially not well understood. We used synchrotron-based high-resolution X-ray micro-computed tomography to quantify the microstructure of soil aggregates under four types of revegetation and an active cropland on the plateau. Five aggregates (3-5 mm) collected from the topsoil at each site were scanned at a voxel resolution of 3.25 mu m, and the aggregate pore structure was visualized and quantified with ImageJ. Total porosities, >75 mu m porosities, fractions of elongated pores, 3D mass fractal dimensions, and connectivity were higher and the numbers of pores, <75 mu m porosities, the mean pore-shape factors, and the fractions of regular and irregular pores were lower in the revegetated sites than the control plot. Total porosities, macro-porosities, micro porosities, fractions of regular pores, and 3D mass fractal dimensions differed significantly among the revegetated sites. We suggest that the fraction of elongated pores can be used as an important indicator for monitoring the recovery of soil structure. 3D mass fractal dimensions differed more than connectivity in the aggregates in the same samples, and thus could be a more sensitive indicator of changes in the pore network. Age and revegetation type both significantly affected the development of soil structure, but revegetation type was more important for the recovery of soil structure. We used a soil structural index (SSI) obtained by principal component analysis to assess the overall quality of soil structure. SSI values were higher in all revegetated sites than the cropland site and differed among the revegetated sites in the order: shrubland > grassland > woodland > pastureland. We recommend shrub plantation and natural grassland for the revegetation of degraded land on the Loess Plateau. (C) 2017 Elsevier B.V. All rights reserved.
资助项目	Key Research Program of the Chinese Academy of Sciences[KJZD-EW-TZ-G10] ; National Natural Science Foundation of China[41171422]
WOS关键词	MICRO-COMPUTED TOMOGRAPHY ; PORE CHARACTERISTICS ; MACROPORE CHARACTERISTICS ; WATER STORAGE ; QUALITY INDEX ; QUANTIFICATION ; FERTILIZATION ; RESTORATION ; DYNAMICS ; TILLAGE
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000403033400001
资助机构	Key Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/63362]
专题	中国科学院地理科学与资源研究所
通讯作者	Xu, Mingxiang; Liu, Guobin
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, 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, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Dong,Xu, Mingxiang,Liu, Guobin,et al. Effect of vegetation type on microstructure of soil aggregates on the Loess Plateau, China[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2017,242:1-8.
APA	Zhao, Dong.,Xu, Mingxiang.,Liu, Guobin.,Ma, Luyang.,Zhang, Shengmin.,...&Peng, Guanyun.(2017).Effect of vegetation type on microstructure of soil aggregates on the Loess Plateau, China.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,242,1-8.
MLA	Zhao, Dong,et al."Effect of vegetation type on microstructure of soil aggregates on the Loess Plateau, China".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 242(2017):1-8.