干旱区研究

干旱区研究 >

2018 , Vol. 35 >Issue 5: 1234 - 1241

DOI: https://doi.org/10.13866/j.azr.2018.05.29

生态与环境

巨菌草留茬沙障防风固沙效益及其适宜模式研究

  • 王强 ,
  • 左合君 ,
  • 李钢铁 ,
  • 郭婧宇 ,
  • 魏翔宏 ,
  • 刘宇胜 ,
  • 闫敏
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  • 内蒙古农业大学沙漠治理学院/内蒙古风沙物理与防沙治沙工程重点实验室, 内蒙古 呼和浩特 010011
王强（1992-），男，硕士研究生，主要研究方向为荒漠化防治.E-mail：wuzhiwq@163.com
白建军. E-mail:bjj@snnu.edu.cn

收稿日期: 2018-01-22

  修回日期: 2018-04-04

  网络出版日期: 2025-11-18

基金资助

国家自然科学基金项目(41171310);陕西省自然科学基础研究计划项目(2016MJ4016)共同资助

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Windbreak and Sand-fixation Efficiency and Suitable Modes of Pennisetum giganteum Sand Barrier

  • Pennisetum giganteum Sand Barrier WANG Qiang ,
  • ZUO He-jun ,
  • LI Gang-tie ,
  • GUO Jing-yu ,
  • WEI Xiang-hong ,
  • LIU Yu-sheng ,
  • YAN Min
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  • College of Desert Control Science and Engineering/Inner Mongolia Key Laboratory of Aeolian Physics and Desertification Control Engineering,Inner Mongolia Agricultural University,Hohhot 010011,Inner Mongolia,China

Received date: 2018-01-22

  Revised date: 2018-04-04

  Online published: 2025-11-18

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摘要

基于对乌兰布和沙漠刘拐沙头黄河沿岸相近株距(10~15 cm)、不同行距(1 m,2 m)、不同留茬高度(10 cm,30 cm)巨菌草的防风阻沙试验的观测数据分析。结果表明:① 巨菌草留茬沙障的防风固沙效益与沙障的高度和行距有直接关系,高度一定,行数越多,带距越小,防护效果越好,但所需材料增加。② 巨菌草留茬沙障内输沙量主要集中在地表15 cm以下,近地表0~5 cm处沙障对风沙流的阻碍能力较强。沙障行距为1 m、2 m时,高10 cm的沙障分别经9 带、12 带后风速降至起沙风速以下;高30 cm的沙障对风的阻碍能力增强,分别经7 带、9 带后地表无流沙运动。③ 沙障的设置应在保证高效的前提下降低成本。行距2 m、高30 cm的巨菌草留茬沙障,气流经过9 个条带(18 m宽)后,风速可降至起沙风速以下,此设置模式宜在干旱地区推广。

关键词： 巨菌草留茬沙障; 风速; 风沙流结构; 防风效能; 输沙量; 乌兰布和沙漠

本文引用格式

王强 , 左合君 , 李钢铁 , 郭婧宇 , 魏翔宏 , 刘宇胜 , 闫敏 . 巨菌草留茬沙障防风固沙效益及其适宜模式研究[J]. 干旱区研究, 2018 , 35(5) : 1234 -1241 . DOI: 10.13866/j.azr.2018.05.29

Abstract

This research aimed at the windbreak and sand-fixation efficiency of Pennisetum giganteum sand barriers with different stubble height (10 cm and 30 cm)at Liuguaishatou along the riparian zone of the Yellow River in the Ulanbuh Desert.The sand barriers were set by P.giganteum with 1 or 2 m row spacing and 10-15 cm plant distance.The results showed that:① The windbreak and sand-fixation efficiency was closely related to the height and row spacing of P.giganteum sand barriers.For a certain height level,the more the rows and the smaller the plant distance were,the better the windbreak and sand-fixation efficiency would be,but the required materials would be increased;② The sediment discharge in the P.giganteum sand barrier was mainly concentrated within a 15 cm height from the ground,and the capability of preventing wind-blown sand was strong below 5 cm.When the row spacing of sand-barrier was 1 or 2 m,the wind speed was reduced below the sand-removing one after wind blew over 9 or 12 sand barriers; ③ A high efficiency and low cost should be ensured in setting sand barrier.It is considered that the P.giganteum sand barrier with 30 cm height and 2 m row spacing is suitable in arid area.

Key words： Pennisetum giganteum; sand barrier; wind speed; sand flow structure; windbreak efficiency; sediment; Ulanbuh Desert

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