| Impact of standing wheat stubble on soil wind erosion on cropland of northern Shaanxi: A indoor wind tunnel simul ation |
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| DOI：10.7606/j.issn.1000-7601.2011.06.36 |
| Key Words: wind erosion wind tunnel simulation wheat stubble stubble density |
| Author Name | Affiliation | | LIU Zhendong | College of Resources and Environment, Northwest A & F University， Yangling, Shaanxi 712100，China | | WANG Fei | College of Resources and Environment, Northwest A & F University， Yangling, Shaanxi 712100，China
Istitute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources，Yangling， Shaanxi 712100， China | | MU Xingmin | College of Resources and Environment, Northwest A & F University， Yangling, Shaanxi 712100，China
Istitute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources，Yangling， Shaanxi 712100， China | | FAN Qing cheng | College of Resources and Environment, Northwest A & F University， Yangling, Shaanxi 712100，China
Istitute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources，Yangling， Shaanxi 712100， China
Graduate School of Chinese Academy of Sciences， Beijing 100049，China | | LI Rui | College of Resources and Environment, Northwest A & F University， Yangling, Shaanxi 712100，China
Istitute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources，Yangling， Shaanxi 712100， China |
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| Abstract: |
| Standing stubble coverage is one of the efficient conservation tllage (CT) measures. It could reduce the wind erosion of topsoil of land through increasing terrain roughness (Z0). Indoor wind tunnel simulation tests were con-ducted to measure and analyze the mass of wind erosion and structure of wind and sand flow on 2 kinds of soil in the Loess Plateau of northern Shaanxi Province with 3 heights of stubble and 2 widths of row space under 4 wind speeds of 6 m/s, 8m/s，10m/s and 12 m/s. The results showed that, the mass of wind erosion of Aeolian Soil (AS) was much more than cultivated lossial soil (CLS) s in the situation of bare soils. All kinds of heights of stubble could play a role in lessening the mass of the particles suspended in the air. Compared to the impact of stubble to AS，the impact of stub-
ble had more effective manifestation to CLS under the same wind speed. With row space reducing to 15 cm from 20 cm，the inhibitory action increased, and the inhibitory action was more remarkable to CLS than AS. On the basis of elabora-tive analysis of spatial distributing structure of eroded particles, it was obvious that drifting sand flux of CLS with stubble mainly moved within 15 cm height of the ground suface, but drifting sand flux of AS floated primarily at 45~ 60 cm height. Increasing the stubble density on two kinds of soils could play an positive impact in decreasing the mass of wind erosion. |
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