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Spatial distribution of caliche nodules in surface soil and their influencing factors in the Liudaogou catchment of the northern Loess Plateau, China
Gong, Tiexiong1,2,3; Zhu, Yuanjun1,2,3; Shao, Ming'an1,2,3,4
2018-11-01
Source PublicationGEODERMA
ISSN0016-7061
Volume329Pages:11-19
Corresponding AuthorZhu, Yuanjun(zhuyj@nwsuaf.edu.cn)
AbstractQuantifying the distribution of caliche nodules in a catchment is a basis toward understanding soil erosion and soil degradation as well as soil-water processes in the soil containing caliche nodules. In this study, field surveys and soil sampling were coupled with spatial and statistical analyses along with image processing to investigate the spatial distribution of caliche nodules and their influencing factors in the Liudaogou catchment, the northern Loess Plateau of China. Results showed that more caliche nodules were present at the top of the mountain, mountain ridges, roadsides, edges of ravines, and other high elevation regions, as represented by comparatively higher caliche nodule coverage (CNC, 11.26-18.28%). Caliche nodules were rarely present in low elevation areas such as the terraced cropland and check dam, as represented by lower CNC ( < 2.55%). More than 65% of the total caliche nodules had a diameter of 10-50 mm. The caliche nodule coverage and diameter showed strong spatial dependence. The CNC was significantly related to the slope gradient and vegetation cover (P < 0.01), and the caliche nodule diameter (CND) was significantly related to the elevation (P < 0.01). Two simple models were established to predict the CNC and CND values given the parameters of slope gradient and vegetation cover. The validation of the models showed relatively high accuracy. These findings quantify caliche nodule distribution in a catchment for the first time, and may benefit the assessment of soil erosion and soil degradation in this special soil in the Loess Plateau.
KeywordCaliche nodules Slope Vegetation cover Elevation Northern Loess Plateau
DOI10.1016/j.geoderma.2018.05.012
WOS KeywordROCK-FRAGMENT COVER ; STONY SOILS ; HYDRAULIC CONDUCTIVITY ; PHYSICAL-PROPERTIES ; CULTIVATED SOILS ; WATER-RETENTION ; EROSION ; DEGRADATION ; HILLSLOPES ; FIELDS
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41371242] ; National Natural Science Foundation of China[41530854] ; Key Research Program of the Chinese Academy of Sciences[KFZD-SW-306]
Funding OrganizationNational Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000436221200002
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/54594
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhu, Yuanjun
Affiliation1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Fanning Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Gong, Tiexiong,Zhu, Yuanjun,Shao, Ming'an. Spatial distribution of caliche nodules in surface soil and their influencing factors in the Liudaogou catchment of the northern Loess Plateau, China[J]. GEODERMA,2018,329:11-19.
APA Gong, Tiexiong,Zhu, Yuanjun,&Shao, Ming'an.(2018).Spatial distribution of caliche nodules in surface soil and their influencing factors in the Liudaogou catchment of the northern Loess Plateau, China.GEODERMA,329,11-19.
MLA Gong, Tiexiong,et al."Spatial distribution of caliche nodules in surface soil and their influencing factors in the Liudaogou catchment of the northern Loess Plateau, China".GEODERMA 329(2018):11-19.
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