Mechanism of High-banded Sand2barriers for Controlling Grassland Desertification

CAO Zi-long; ZHAO Ting-ning; ZHENG Cui-ling; SUN Bao-ping

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Mechanism of High-banded Sand2barriers for Controlling Grassland Desertification

- Mechanism of High-banded Sand2barriers for Controlling Grassland Desertification
- Bulletin of Soiland Water Conservation Vol. 24, Issue 4, Pages: 15-19(2005)
- 作者机构：
  
  北京林业大学水土保持学院,北京,100083
- 作者简介：
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- DOI：
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- Published：2005
- 稿件说明：
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CAO Zi-long, ZHAO Ting-ning, ZHENG Cui-ling, et al. Mechanism of High-banded Sand2barriers for Controlling Grassland Desertification[J]. Bulletin of Soiland Water Conservation, 2005, 24(4): 15-19.
DOI：

CAO Zi-long, ZHAO Ting-ning, ZHENG Cui-ling, et al. Mechanism of High-banded Sand2barriers for Controlling Grassland Desertification[J]. Bulletin of Soiland Water Conservation, 2005, 24(4): 15-19. DOI：

摘要

在草地严重沙化后形成的沙丘

且其上设置有不同年龄(2~3a和4~5a)带状高立式芦苇沙障的地段

分别对沙丘不同部位(迎风坡、背风坡和丘间低地)及沙障不同位置(沙障迎风面、背风面和两沙障中间)土壤种子库、土壤有机质含量和土壤机械组成进行了研究

并以同类型未设沙障的地段作对照

深入地对带状高立式沙障防治草地沙化的机理进行了研究。结果表明

在严重沙化草地设置带状高立式沙障

可有效拦截风沙流中所携带的植物种子

丰富土壤种子库

提高土壤有机质含量

使土壤机械组成中

较粗的砂粒含量减少

较细的砂粒含量增加。

Abstract

Based on the investigation of soil seed bank

the soil organic matter contents and soil mechanical composition in different parts of sand dunes

so2called windward side

leeward side and lowland of sand dune

also the windward side parts

leeward side and the intersection of sand2barrier separately

where the sandy grassland in seriously desertificated and installed with high-banded sand2barrier of different years (2～3 and 4～5 years).The mechanism of high-banded sand2barriers for controlling desertification of grassland are studied by comparing with the same kind of places without sand2barrier.The result shows that installation of high-banded sand-barrier in seriously desertificated grassland can intercept seeds in sandy-driving wind

enriching seed bank

increase the contents of soil organic matter

decrease the coarse sand particles

increase the contents of minute sand parts in soil particlesize composition.

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