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Soil resistance to concentrated flow and sediment yields following cropland abandonment on the Loess Plateau, China
Zhang, Zheng1; Li, Qiang2; Liu, Guobin1,3; Tuo, Dengfeng1; Liu, GB (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.; Liu, GB (reprint author), Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China.
SubtypeArticle
2017
Source PublicationJOURNAL OF SOILS AND SEDIMENTS
ISSN1439-0108
description.correspondentemailgbliu@ms.iswc.ac.cn
Volume17Issue:6Pages:1662-1671
AbstractThe main objective of the present study was to investigate the effects of cropland abandonment on soil erodibility as measured by soil resistance to concentrated flow and sediment yield. Through the method of space-for-time substitution, undisturbed soil samples were collected at depths of 0-15 and 15-30 cm in the fields of different abandonment stages (including cropland for control, about 10 years for juvenile abandonment stage, 20 years for intermediate abandonment stage and 30 years for mature abandonment stage). Laboratory experiments simulating concentrated flow were conducted with a flume (200 cm long, 10 cm wide and 5 cm deep) to investigate soil resistance to concentrated flow and sediment yield. Soil physical properties (bulk density, porosity, aggregation, mean weight diameter, shear strength and disintegration rate) were measured. After each scouring test, roots were collected and root characteristics were measured. Compared with control, soil resistance to concentrated flow increased following cropland abandonment. For the upper (0 to 15 cm) soil layers, the increments of soil resistance to concentrated flow ranged from 5.0 times in the juvenile stage to 9.9 times in the intermediate stage, and it dropped to 2.5 times in the mature stage. For the lower (15 to 30 cm) soil layers, it increased from 1.3 times in the juvenile stage to 2.1 times in the intermediate stage, and it reached up to 4.1 times in the mature stage. In comparison with the total sediment yields of control, 66.0 and 49.3% reductions were averagely observed in the upper and lower soil layers of the abandoned soils, respectively. The increasing soil resistance to concentrated flow indicated the decreasing sediment available for scouring and this observation may largely be attributed to the ameliorated aggregation, shear strength, disintegration rate and the extended dense root network following cropland abandonment. Laboratory experiments simulating concentrated flow showed that, within 33 years of cropland abandonment, sediment yields greatly reduced and soil resistance to concentrated flow increased constantly and significantly. Soil aggregate, shear strength, soil disintegration rate and root surface area density were determined to be the key factors in the strengthening of soil resistance to concentrated flow on the abandoned cropland in the hilly Loess Plateau.
KeywordConcentrated Flow Soil Physical Property Cropland Abandonment Roots Space-for-time Substitution
Subject AreaEnvironmental Sciences & Ecology ; Agriculture
DOI10.1007/s11368-017-1650-3
URL查看原文
Indexed BySCI
Publication PlaceHEIDELBERG
Language英语
WOS IDWOS:000401436200014
PublisherSPRINGER HEIDELBERG
Funding Organization'Strategic Priority Research Program-Climate Change: Carbon Budget and Relevant Issues' of the Chinese Academy of Sciences [XDA05060300]; National Natural Science Foundation of China [41661101]; Open Program of the State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CASMWR [A314021402-1604] ; 'Strategic Priority Research Program-Climate Change: Carbon Budget and Relevant Issues' of the Chinese Academy of Sciences [XDA05060300]; National Natural Science Foundation of China [41661101]; Open Program of the State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CASMWR [A314021402-1604]
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/7988
Collection水保所科研产出--SCI_2017--SCI
Corresponding AuthorLiu, GB (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.; Liu, GB (reprint author), Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China.
Affiliation1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Yulin Univ, Coll Life Sci, Yulin 719000, Shaanxi, Peoples R China
3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Zheng,Li, Qiang,Liu, Guobin,et al. Soil resistance to concentrated flow and sediment yields following cropland abandonment on the Loess Plateau, China[J]. JOURNAL OF SOILS AND SEDIMENTS,2017,17(6):1662-1671.
APA Zhang, Zheng,Li, Qiang,Liu, Guobin,Tuo, Dengfeng,Liu, GB ,&Liu, GB .(2017).Soil resistance to concentrated flow and sediment yields following cropland abandonment on the Loess Plateau, China.JOURNAL OF SOILS AND SEDIMENTS,17(6),1662-1671.
MLA Zhang, Zheng,et al."Soil resistance to concentrated flow and sediment yields following cropland abandonment on the Loess Plateau, China".JOURNAL OF SOILS AND SEDIMENTS 17.6(2017):1662-1671.
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