Soil water response to precipitation in different microtopographies on the semi-arid Loess Plateau,China  

作　　者：Huan Ma Qingke Zhu Weijun Zhao 

机构地区：[1]Forestry Ecological Engineering Research Center,School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,People’s Republic of China [2]Key Laboratory of Tourism and Resources Environment in Colleges and Universities of Shandong Province,Taishan University,Taian,Shandong 271000,People’s Republic of China

出　　处：《Journal of Forestry Research》2020年第1期245-256,共12页林业研究（英文版）

基　　金：financially supported by Forestry Industry Research Special Funds for Public Welfare Projects(201104002-2);China National Scientific and Technical Innovation Research Project for 12th Five Year Plan(2015BAD07B0201)

摘　　要：Soil water is an important factor restricting afforestation on the semi-arid Loess Plateau.The microtopography of the loess slope has changed the distribution pattern of soil water on the slope.To improve water utilization efficiency and optimize afforestation configuration patterns,the relationship between soil water and precipitation at micro-topographic scale must be studied.We used time series analysis to study the temporal variation of soil water and its response to precipitation in four kinds of micro-topographies and undisturbed slope on loess slopes.Micro-topographies significantly influenced soil water distribution and dynamics on the slopes.Soil water stored in the platform,sinkhole,and ephemeral gully influenced subsequent soil water for 4 weeks,whereas soil water stored in the scarp and undisturbed slope could influence soil water for 2 weeks.It took 12 weeks,10 weeks,18 weeks,6 weeks,and 12 weeks for precipitation to reach the deeper soil layer in the platform,sinkhole,scarp,ephemeral gully,and undisturbed slope,respectively.These soil water characteristics in different micro-topographies are vital factors that should be taken into consideration when undertaking afforestation on the Loess Plateau.Soil water is an important factor restricting afforestation on the semi-arid Loess Plateau.The microtopography of the loess slope has changed the distribution pattern of soil water on the slope.To improve water utilization efficiency and optimize afforestation configuration patterns,the relationship between soil water and precipitation at micro-topographic scale must be studied.We used time series analysis to study the temporal variation of soil water and its response to precipitation in four kinds of micro-topographies and undisturbed slope on loess slopes.Micro-topographies significantly influenced soil water distribution and dynamics on the slopes.Soil water stored in the platform,sinkhole,and ephemeral gully influenced subsequent soil water for 4 weeks,whereas soil water stored in the scarp and undisturbed slope could influence soil water for 2 weeks.It took 12 weeks,10 weeks,18 weeks,6 weeks,and 12 weeks for precipitation to reach the deeper soil layer in the platform,sinkhole,scarp,ephemeral gully,and undisturbed slope,respectively.These soil water characteristics in different micro-topographies are vital factors that should be taken into consideration when undertaking afforestation on the Loess Plateau.

关 键 词：Semi-arid Loess Plateau MICRO-TOPOGRAPHY AFFORESTATION Time series analysis Soil water 

分 类 号：S15[农业科学—土壤学]