Windbreak Effectiveness of Haloxylon Ammodendron on Northeast Edge of Ulan Buh Desert

LI Peng; GAO Yong; ZHAO Qing; HAN Yanlong; DING Yanlong; DANG Xiaohong

doi:10.13961/j.cnki.stbctb.2017.05.006

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Windbreak Effectiveness of Haloxylon Ammodendron on Northeast Edge of Ulan Buh Desert

- Windbreak Effectiveness of Haloxylon Ammodendron on Northeast Edge of Ulan Buh Desert
- Bulletin of Soiland Water Conservation Vol. 37, Issue 5, Pages: 34-39(2017)
- 作者机构：
  
  1. 内蒙古农业大学沙漠治理学院,内蒙古,呼和浩特,010018
  2. 内蒙古农业大学草原与资源环境学院,内蒙古,呼和浩特,010018
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2017.05.006
  CLC：
- Published：2017
- 稿件说明：
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LI Peng, GAO Yong, ZHAO Qing, et al. Windbreak Effectiveness of Haloxylon Ammodendron on Northeast Edge of Ulan Buh Desert[J]. Bulletin of Soiland Water Conservation, 2017, 37(5): 34-39.
DOI：

LI Peng, GAO Yong, ZHAO Qing, et al. Windbreak Effectiveness of Haloxylon Ammodendron on Northeast Edge of Ulan Buh Desert[J]. Bulletin of Soiland Water Conservation, 2017, 37(5): 34-39. DOI： 10.13961/j.cnki.stbctb.2017.05.006.

摘要

[目的] 测定乌兰布和沙漠东北缘不同林龄各坡位的风速，揭示梭梭林防风效能随林龄的变化规律以及与梭梭空间构型的关系。[方法] 以乌兰布和沙漠东北缘种植3，5和8 a的人工梭梭林为研究对象，通过测定林内及CK不同坡位距地表10，20，50，100，200 cm高度处风速，对比不同年限梭梭林的防风效能。[结果] 随着林龄的增加，梭梭林对近地表风速减弱作用增强；同一坡位下，3 a梭梭林防风效能主要作用在0-100 cm高度内，防风效能为48.19%，100-200 cm高度内风速迅速恢复。5，8 a梭梭林对0-200 cm高度范围均有很好的防护作用，防风效能分别为69.72%，71.93%，二者间减弱效果差异不明显。相关分析显示梭梭林空间构型与防风效能显著相关，梭梭盖度、高度、冠幅与防风效能的相关性分别达到0.935，0.930，0.942。[结论] 3 a梭梭林迎风坡底、背风坡的防风效能优于迎风坡中、迎风坡顶，5，8 a梭梭林与之相反。

Abstract

[Objective] Wind speeds at different slope positions of Haloxylon Ammodendron forest were investigated on the northeast edge of Ulan Buh desert

in order to reveal the variation of windbreak effectiveness of Haloxylon ammodendron with plantation age and spatial pattern.[Methods] Forests of H. ammodendron at 3 a

5 a and 8 a plantation ages were selected as research objects. The wind speeds at 10 cm

20 cm

50 cm

100 cm

200 cm heights above ground were measured respectively in the bottom

middle and top of windward slope and bottom of leeward slope for windbreak effectiveness analyzing.[Results] The wind speed near ground surface declined with the increase of plantation ages. Windbreak effectiveness of 3 years' shrub was mainly found in 0-100 cm height

the averaged value was 48.19%. At 100-200 cm height

wind speed rebounded to the CK value quickly. Good windbreak effect were found both in 5 years and 8 years forests at height 0-200 cm

and their windbreak efficiency were 69.72% and 71.93% respectively. Correlation analysis showed that there existed a significant correlation between plantation pattern and windbreak effect. The correlation coefficients between windbreak effect and forest coverage

height and crown width were 0.935

0.930

0.942 respectively.[Conclusion] Windbreak effects in the bottom of windward slope and leeward slope were better than those in the middle and top of windward slope of 3 years forest. It was contrary for the forests having 5 years and 8 years plantation ages.

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