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Contribution of soil macropores to water infiltration across different land use types in a desert-oasis ecoregion

文献类型：期刊论文

作者Zhang, Yongyong3; Zhao, Wenzhi3; Li, Xiaobin2; Jia, Angyuan1,3; Kang, Wenrong1,3
刊名LAND DEGRADATION & DEVELOPMENT
出版日期2020-12-02
页码10
ISSN号1085-3278
关键词arid areas pore structure saturated hydraulic conductivity soil physicochemical properties water infiltration
DOI10.1002/ldr.3823
通讯作者Zhang, Yongyong(zhangxyz23@126.com) ; Li, Xiaobin(lixbin@igsnrr.ac.cn)
英文摘要Surface soil hydraulic properties play critical roles in controlling water infiltration, evaporation, and soil water storage, in-turn affecting the evolution of soil pore structure in cultivated desert soils of arid areas. The variability in soil pores and hydraulic properties caused by conversion of native semidesert soils to agroforestry use alters soil water storage and water budget in the desert-oasis ecotone. The objective of this study was to investigate that land use conversion alters surface soil hydraulic properties and enhances the contribution of soil macropores to water flow in the Linze desert-oasis ecoregion. Water infiltration and soil pores characteristics with nine replicates were measured using a disc tension infiltrometer across four habitat types (Haloxylon ammodendron shrublands, Populus gansuensis forests, Medicago sativa Linn grasslands, and Zea mays croplands) during the growing season. Soil properties and hydraulic conductivity characteristics clearly varied across the four habitat types. Saturated hydraulic conductivity was 0.177, 0.126, 0.118, and 0.031cm min(-1) in the forest, grassland, shrubland, and cropland, respectively, with the corresponding average soil moisture being 7.6, 6.7, 0.9, and 19.2%. Clay content, bulk density, and initial soil moisture were the key soil physicochemical properties affecting saturated hydraulic conductivity (K-s). The macropores (> 0.5 mm in radius) accounted for 15-60% of total water flow, while 0.25-0.5 mm pores contributed to 12-24% across the four habitat types. The contribution of >0.5 mm pores to water flow in the forest was 3.3-4.0-times greater than in shrubland and cropland, due to greater soil macroporosity (58 cm(-3) cm(3) ) and undisturbed soil pore structure. Land use conversion has a positive impact on soil properties, structure features, and soil hydraulic properties, and as a consequence, enhance the complexity of water exchange in the arid areas.
WOS关键词HYDRAULIC-PROPERTIES ; CONSERVATION TILLAGE ; HEXI CORRIDOR ; FLOW ; ECOTONE ; REGION ; SILTY ; INFILTROMETER ; CONDUCTIVITY ; MESOPOROSITY
资助项目National Natural Science Foundation of China[4877153] ; National Natural Science Foundation of China[41630861] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23060302] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2020420]
WOS研究方向Environmental Sciences & Ecology ; Agriculture
语种英语
出版者WILEY
WOS记录号WOS:000594725400001
资助机构National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
源URL[http://ir.igsnrr.ac.cn/handle/311030/156413]  
专题中国科学院地理科学与资源研究所
通讯作者Zhang, Yongyong; Li, Xiaobin
作者单位1.Univ Chinese Acad Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Linze Inland River Basin Res Stn, Lanzhou, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Yongyong,Zhao, Wenzhi,Li, Xiaobin,et al. Contribution of soil macropores to water infiltration across different land use types in a desert-oasis ecoregion[J]. LAND DEGRADATION & DEVELOPMENT,2020:10.
APA Zhang, Yongyong,Zhao, Wenzhi,Li, Xiaobin,Jia, Angyuan,&Kang, Wenrong.(2020).Contribution of soil macropores to water infiltration across different land use types in a desert-oasis ecoregion.LAND DEGRADATION & DEVELOPMENT,10.
MLA Zhang, Yongyong,et al."Contribution of soil macropores to water infiltration across different land use types in a desert-oasis ecoregion".LAND DEGRADATION & DEVELOPMENT (2020):10.

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来源：地理科学与资源研究所

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