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[1]DENG Xinxin,ZHANG Jiaqiong,YANG Mingyi,et al.Characteristics of Soil Wind Erosion on Sloping Farmland in the Water-Wind Erosion Crisscross Region on the Loess Plateau[J].Research of Soil and Water Conservation,2019,26(03):1-6.

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Characteristics of Soil Wind Erosion on Sloping Farmland in the Water-Wind Erosion Crisscross Region on the Loess Plateau

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 03 Page number: 1-6 Column: Public date: 2019-04-12

Title:: Characteristics of Soil Wind Erosion on Sloping Farmland in the Water-Wind Erosion Crisscross Region on the Loess Plateau

Author(s):: DENG Xinxin¹, ZHANG Jiaqiong^1,2, YANG Mingyi^1,2, ZHANG Fengbao^1,2, LIU Zhang³; 1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China;
3. Baotou Research Institute of Rare Earths, Baotou, Inner Mongolia 014030, China

Keywords:: ⁷Be measurement; wind erosion rate; farmland tillage pattern; spatial distribution pattern; wind-water erosion crisscross region

CLC:: S157

DOI:: -

Abstract:: The wind-water erosion crisscross region on the Loess Plateau is one of the most serious erosion areas in the world due to the combined action of wind and water. We selected four sloping farmlands facing opposite slope aspects in the Liudaogou watershed to study the effect of tillage pattern on soil wind erosion using ⁷Be tracing approach. The selected fields remained crop stubbles or plowed after harvest. We collected surface soil samples (0-20 mm) from sloping farmlands with different management measures facing different slope aspects to estimate the rates of soil wind erosion, to delineate the spatial distribution characteristics of wind erosion rate, and to clarify effects of tillage measures on wind erosion. The results showed that wind erosion rate on windward slope was significantly greater than that on leeward slope (p<0.05); stubbleremaining could significantly reduce wind erosion in condition of applying the same tillage operations (p<0.05); wind erosion rates of farmlands of plowed land, and stubble land located on the windward slope and the leeward slope were 778.2 t/(km²·a), 388.4 t/(km²·a), 78.5 t/(km²·a), and 4.7 t/(km²·a), respectively; wind erosion rate decreased gradually in a top-down direction along the slope, and the reduction rates in the stubble fields were more significant than that in the plowed fields. The deformation of the wind erosion rate contours showed the changes of the micro-geomorphological, especially in the stubble plots with high erosion or deposition centers. Therefore, in order to effectively control soil wind erosion in the study region, we suggested to adopt the methods of stubble remaining after autumn harvest, plow before spring sowing, and increase stubble height according to slope aspect and crop types.

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