Preliminary Study on Physical and Chemical Characteristics of Wind-blown Sediment in Bashang Region of Hebei Province

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Preliminary Study on Physical and Chemical Characteristics of Wind-blown Sediment in Bashang Region of Hebei Province

- Preliminary Study on Physical and Chemical Characteristics of Wind-blown Sediment in Bashang Region of Hebei Province
- Bulletin of Soiland Water Conservation Vol. 16, Issue 1, Pages: 1-6(1997)
- 作者机构：
  
  中国科学院兰州沙漠研究所,兰州市,730000
- 作者简介：
- 基金信息：
- DOI：
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- Published：1997
- 稿件说明：
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Hasi. Preliminary Study on Physical and Chemical Characteristics of Wind-blown Sediment in Bashang Region of Hebei Province[J]. Bulletin of Soiland Water Conservation, 1997, 16(1): 1-6.
DOI：

Hasi. Preliminary Study on Physical and Chemical Characteristics of Wind-blown Sediment in Bashang Region of Hebei Province[J]. Bulletin of Soiland Water Conservation, 1997, 16(1): 1-6. DOI：

摘要

根据河北坝上地区风蚀耕地近地面风蚀物及相应土壤表层样品的野外采集与室内分析结果，风蚀物含量随高度呈指数函数规律减少。与相应土壤表层相比，风蚀物中细砂级以下颗粒，有机质及养分含量增加。随着输沙量增加，风蚀物中粗颗粒（沙粒）含量增加，而细颗粒（粉砂和粘土）含量减少，随之有机质及养分含量也减少。随着高度增加，粗颗粒含量减少而细颗粒、有机质和养分含量增加。因而在输沙量增加时，会有大量的细颗粒和营养物质从土壤中流失。此外，耕作措施通过改变地表状况影响输沙量，进而影响风蚀物理化性质

Abstract

The systematic sampl ing of near surface wind-blown sediment and corresponding upper soil in Bashang region

Hebei pro vince is co nducted.The result showed that the quantity of wind-blown sediment decreased exponent ially with the incr easing heig ht above ground level.The content of f iner part icles( ≤0. 25mm)

or ganic matter and plant nutrient incresed significantly in wind-blow n sediment in comparison with that of corresponding upper soil surface. As the sample size increased

the percentage of sand increased but the silt and clay decreased

and the content of organic matter and plant nut rient decreased. However

the percentage of finer particles ( silt and clay ) and the content of or ganic matter and nutrient increased with the increasing height abov e soil sur face

it indicates that the amount of fine particles and plant nut rient lost f rom soil during higher er osive w ind environment . In addition

tillage methods af fect the soil wind erosion through changing surface properties and then influence the physical and chemical characterist ics of wind-blown sedment .

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