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[1]ZHAO Yu-ming,LIU Bao-yuan,JIANG Hong-tao.Distribution of Tillage-induced Direction and Its Effect on Soil Erosion in Black Soil Area of Northeast China[J].Research of Soil and Water Conservation,2012,19(05):1-6.

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Distribution of Tillage-induced Direction and Its Effect on Soil Erosion in Black Soil Area of Northeast China

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 05 Page number: 1-6 Column: Public date: 2012-10-20

Title:: Distribution of Tillage-induced Direction and Its Effect on Soil Erosion in Black Soil Area of Northeast China

Author(s):: ZHAO Yu-ming, LIU Bao-yuan, JIANG Hong-tao; State Key Laboratory of Surface Process and Resource Ecology, School of Geography, Beijing Normal University, Beijing 100875, China

Keywords:: black soil area in northeast China; tillage-induced direction; soil erosion; soil and water loss investigation

CLC:: S157

DOI:: -

Abstract:: Ridge tillage is a common and important tillage practice in black soil area of northeast China. The distribution of ridge direction and its protection for soil are very important significance to understand and improve the situation of soil and water conservation in northeast China. According to the method of stratified samplings, 168 field cells were selected and surveyed in Binxian County, which is on the east border of the typical Chernozem region in northeast China, and their land-use types as well as ridge directions were drafted on corresponding relief maps according to data recorded with GPS locator instrument. After digitalizing 1:10 000 relief maps and converting the information above into a multitude of numbers, the terrestrial slope, the angle included between contour line and ridge direction, tillage-induced directional slope and the benefits induced by the ratio of the terrestrial slope factor and the responding tillage-induced directional slope factor were calculated, analyzed, classified, arranged and then displayed on a series of maps and tables with Arcmap, SPSS, Orgin and other software. And several conclusions were drawn from this study:(1) in the farmlands of the whole study area, the average terrestrial slope was 2.96°;(2) the area generally increased while the angle between contour line and ridge direction enlarged in 75% sloping fields;when the angle was between 0°to 15°, its area was about 9.7% in the whole farmlands;however, when the angle was between 75°to 90°, its area was about 17.3%;the former was only about 50% of the latter;(3) when the ridge slope was adopted in the whole study area, its average slope declined down to 2.15°, which was about 72% of 2.95°;(4) water and soil loss in the present tillage system was only 60% of that in the up-and-down tillage system. So, improving tillage-induced direction may reverse the serious soil and water loss situation in black soil area in northeast China.

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