干旱区生态环境知识资源中心(Arid): Pairing dual-frequency GPR in summer and winter enhances the detection and mapping of coarse roots in the semi-arid shrubland in China

Arid

DOI	10.1111/ejss.12858
	Pairing dual-frequency GPR in summer and winter enhances the detection and mapping of coarse roots in the semi-arid shrubland in China
	Cui, X.1,2; Liu, X.1,3; Cao, X.1,2; Fan, B.3; Zhang, Z.2; Chen, J.1,2; Chen, X.1,2 ; Lin, H.3; Guo, L.3
通讯作者	Guo, L.
来源期刊	EUROPEAN JOURNAL OF SOIL SCIENCE
ISSN	1351-0754
EISSN	1365-2389
出版年	2020
卷号	71 期号:2 页码:236-251
英文摘要	To complement traditional methods of studying coarse roots (>2 mm in diameter) that are often destructive, laborious and point-based, we tested a dual-frequency ground-penetrating radar (GPR) to non-invasively map lateral coarse roots of shrubs (Caragana microphylla Lam.) in the sandy soil of a temperate semi-arid shrubland. The dual-frequency GPR system used in this study simultaneously collects data with two antenna frequencies (400 and 900 MHz). The GPR surveys were repeated in a grid (11 x 4.8 m(2) with a total of 46 survey lines) in summer and winter. Both antenna frequencies and seasonal GPR surveys generated a consistent pattern of the distribution of lateral coarse roots, indicating reliable interpretation of GPR data for coarse roots mapping. The 400 MHz GPR and the winter survey detected more roots in the deeper soil (>0.6 m depth), whereas the 900 MHz GPR and the summer survey detected more in the shallower soil (<0.6 m depth). The higher wave velocity and lower degree of GPR energy attenuation in the frozen soil enhanced the detection of deep coarse roots. Combining root detection results obtained under all conditions revealed a higher distribution density of lateral coarse roots beneath a depression and at the depth of 0.4-0.6 m, but a lower abundance under the intershrub area (i.e. showing the avoidance of intershrub root overlap). These patterns were not evident in GPR images collected using a single frequency antenna in one season. Ground truthing confirmed that pairing GPR data collected at two frequencies improved the detection frequency of the number of lateral coarse roots. More field tests are required to validate the application of repeated dual-frequency GPR surveys to detect and quantify coarse roots in other ecosystems. Highlights The detection of lateral coarse roots by GPR needs to be further improved in field soils. Dual-frequency GPR surveys were repeated in summer and winter to enhance coarse roots mapping. Combining seasonal dual-frequency GPR data improved detection frequency of the number of roots. Topography and intershrub root competition influence the distribution of lateral coarse roots.
英文关键词	field condition geophysics non-invasive plant-soil interaction repeated surveys root competition root distribution
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000477137700001
WOS关键词	GROUND-PENETRATING RADAR ; SOIL-WATER CONTENT ; PREFERENTIAL FLOW ; INNER-MONGOLIA ; SPATIAL-PATTERNS ; BIOMASS ; MOISTURE ; FINE ; DISTRIBUTIONS ; ARCHITECTURE
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215599
作者单位	1.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing, Peoples R China; 2.Beijing Normal Univ, Fac Geog Sci, Inst Remote Sensing Sci & Engn, Beijing Engn Res Ctr Global Land Remote Sensing P, Beijing, Peoples R China; 3.Penn State Univ, Dept Ecosyst Sci & Management, State Coll, PA 16801 USA
推荐引用方式 GB/T 7714	Cui, X.,Liu, X.,Cao, X.,et al. Pairing dual-frequency GPR in summer and winter enhances the detection and mapping of coarse roots in the semi-arid shrubland in China[J]. 北京师范大学,2020,71(2):236-251.
APA	Cui, X..,Liu, X..,Cao, X..,Fan, B..,Zhang, Z..,...&Guo, L..(2020).Pairing dual-frequency GPR in summer and winter enhances the detection and mapping of coarse roots in the semi-arid shrubland in China.EUROPEAN JOURNAL OF SOIL SCIENCE,71(2),236-251.
MLA	Cui, X.,et al."Pairing dual-frequency GPR in summer and winter enhances the detection and mapping of coarse roots in the semi-arid shrubland in China".EUROPEAN JOURNAL OF SOIL SCIENCE 71.2(2020):236-251.