Wind Tunnel Simulation of Wind Erosion in Surface Soil of Farmland Under Different Tillage Patterns in Minqin Oasis

Zhao Yuhao; WANG Li; Yang Caihong; Wang Junqiang

doi:10.13961/j.cnki.stbctb.2019.04.032

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Wind Tunnel Simulation of Wind Erosion in Surface Soil of Farmland Under Different Tillage Patterns in Minqin Oasis

- Wind Tunnel Simulation of Wind Erosion in Surface Soil of Farmland Under Different Tillage Patterns in Minqin Oasis
- Bulletin of Soiland Water Conservation Vol. 39, Issue 4, Pages: 202-206(2019)
- 作者机构：
  
  1. 甘肃农业大学林学院,甘肃,兰州,730070
  2. 甘肃省农业工程技术研究院,甘肃,武威,733007
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2019.04.032
  CLC： S157
- Published：2019
- 稿件说明：
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Zhao Yuhao, WANG Li, Yang Caihong, et al. Wind Tunnel Simulation of Wind Erosion in Surface Soil of Farmland Under Different Tillage Patterns in Minqin Oasis[J]. Bulletin of Soiland Water Conservation, 2019, 39(4): 202-206.
DOI：

Zhao Yuhao, WANG Li, Yang Caihong, et al. Wind Tunnel Simulation of Wind Erosion in Surface Soil of Farmland Under Different Tillage Patterns in Minqin Oasis[J]. Bulletin of Soiland Water Conservation, 2019, 39(4): 202-206. DOI： 10.13961/j.cnki.stbctb.2019.04.032.

摘要

[目的]比较分析不同耕作方式下农田表层土壤防风蚀机理和效果，为区域社会经济和生态环境建设提供科学依据。[方法]利用室内风洞及相关配套设备对甘肃民勤绿洲区的免耕、少耕、秋翻和深松农田表层土壤进行风蚀测试，计算风蚀速率及输沙率，研究其风沙运动规律，分析各种耕作农田表层土壤防风蚀情况。[结果]耕作措施对土壤风蚀速率的影响与风速大小相关，风速较小时，不同耕作方式对风速的影响差异不显著，而当风速大于14 m/s后不同耕作农田表层土壤风蚀速率开始出现较明显差异；少耕、秋翻、深松等耕作方式对农田表层土壤风蚀速率和输沙率的影响差异不明显；免耕耕作方式下农田表层土壤风蚀速率和输沙率最低，风速越高，差距越大；风速、耕作以及两者交互作用对农田表层土壤风蚀速率和输沙率有极显著影响。[结论]免耕耕作能有效抵抗农田表层土壤的风蚀，大幅度减少输沙率，表现出极佳的抗风蚀效果。

Abstract

[Objective] The mechanism and effects of wind erosion prevention of farmland surface soil under different tillage patterns were compared and analyzed

so as to provide scientific basis for regional socio-economic and ecological environment construction.[Methods] Wind erosion tests were carried out on no-tillage

less tillage

autumn ploughing and subsoiling farmland surface soil in Minqin Oasis

Gansu Province

using indoor wind tunnel and related supporting equipment

wind erosion rate and sand transport rate were calculated

wind erosion movement law was studied

and wind erosion prevention of farmland surface soil was analyzed.[Results] The results showed that the effects of tillage measures on soil wind erosion rate were related to wind speed. When wind speed was small

the effects of different tillage patterns on wind speed were not significant

but when wind speed was greater than 14 m/s

the wind erosion rates of surface soils began to show significant differences in different tillage fields; the effects of less tillage

autumn tillage

deep loosening and other tillage patterns on wind erosion rate and sand transport rate of surface soils were significant. The wind erosion rate and sediment transport rate of farmland surface soil were the lowest under no-tillage tillage

and the higher the wind speed

the greater the gap. Wind speed

tillage and their interaction had a significant impact on the wind erosion rate and sediment transport rate of farmland surface soil.[Conclusion] No-tillage could effectively resist the wind erosion of the surface soil of farmland

greatly reduce the sand transport rate

showing excellent anti-wind erosion effect.

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references

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