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Permanent gully increases the heterogeneity of soil water retention capacity across a slope-gully system
Gan, Miao1; Jia, Yuhua1; Shao, Ming'an2; Guo, Chengjiu1; Li, Tongchuan3
2019-02-15
Source PublicationAGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN0167-8809
Volume272Pages:206-217
Corresponding AuthorShao, Ming'an(shaoma@igsnrr.ac.cn)
AbstractThe coexistence of permanent gully and slope farmland in the northern Loess Plateau catchment has experienced great changes since the implementation of the Grain for Green project in 1999. This program swaps agricultural production in the slope land for soil and water conservation measures. To date, the slope-gully system soil water retention capacity are poorly understood. In our study, undisturbed soil samples at 0-25 cm depth were taken from three transects along a gully bottom, bank and nearby slope, and the effects of gully terrain and slope position on the soil water retention curves (WRC) in two soil layers (surface layer: 0-12 cm; sub-surface layer: 12-25 cm) were evaluated. The results showed that: (1) with the increasing suction, soil water retention capacity within the vertical direction of the gully bottom was constant and increased on the nearby slope. For all the slope positions on the gully bank, the WRC shapes of surface soil differed from those of sub-surface soil; (2) The capillary rupture moisture in the surface soil at the lower (L-) slope of the gully bank occurred at low suction pressure. The available water content of the L-slope was lower than the upper (U-) slope in the gully bank; (3) The gully increased the complexity of soil pore distribution across the slope-gully system. The gully bank reduced the water retention capacity of surface soil. In conclusion, the permanent gully enhanced the heterogeneity of soil water retention capacity. These results provide specific information about hydrological functioning in gullied areas and improves our understanding of soil hydrology in the post-farmland environment in the northern Loess Plateau.
KeywordSoil water retention curve van Genuchten model Soil pores X-ray computed tomography Loess Plateau
DOI10.1016/j.agee.2018.10.007
WOS KeywordSATURATED HYDRAULIC CONDUCTIVITY ; PORE-SIZE DISTRIBUTION ; LOESS PLATEAU ; LAND-USE ; COMPUTED-TOMOGRAPHY ; STONY SOILS ; MOISTURE ; INFILTRATION ; MACROPORES ; PARAMETERS
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41571221] ; National Natural Science Foundation of China[41390463] ; National Natural Science Foundation of China[41571130081]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaAgriculture ; Environmental Sciences & Ecology
WOS SubjectAgriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS IDWOS:000468247700022
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/59269
Collection中国科学院地理科学与资源研究所
Corresponding AuthorShao, Ming'an
Affiliation1.Shenyang Agr Univ, Coll Water Conservancy, Shenyang 110866, Liaoning, Peoples R China
2.Northwest A&F Univ, Coll Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Gan, Miao,Jia, Yuhua,Shao, Ming'an,et al. Permanent gully increases the heterogeneity of soil water retention capacity across a slope-gully system[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2019,272:206-217.
APA Gan, Miao,Jia, Yuhua,Shao, Ming'an,Guo, Chengjiu,&Li, Tongchuan.(2019).Permanent gully increases the heterogeneity of soil water retention capacity across a slope-gully system.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,272,206-217.
MLA Gan, Miao,et al."Permanent gully increases the heterogeneity of soil water retention capacity across a slope-gully system".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 272(2019):206-217.
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