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Scientia Silvae Sinicae ›› 2008, Vol. 44 ›› Issue (5): 11-16.doi: 10.11707/j.1001-7488.20080505

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Windbreak Effects of Different Scheme Artemisia ordosica Shrub for SandFixation in Low Cover

Yang Hongyan1.2,Dai Shengmao3,Le Lin4,Wang Linhe4,Yang Wenbin2,5,Wang Jingying3,Hu Xiaolong3

  

  1. （1.Inner Mongolia Environmental Science Academy Hohhot 010010; 2.Inner Mongolia Academy of Forestry Science Hohhot 010010;3.National Bureau to Combat Desertification, State Hohhot 010010; 4.Inner Mongolia Agricultural University Hohhot 010010; 5.Institute of New Technology in Forestry, Chinese Academy of Forestry Key Laboratory for Forest Tree Breeding of the State Forestry Administration The National Research and Development Center for Combating Desertification of China Beijing 100091）
  • Received:2006-11-14 Revised:1900-01-01 Online:2008-05-25 Published:2015-04-22

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Abstract:

In this study we investigated the windbreak effects of a shrub(Artemisia ordosica) with its 20% cover established for the purpose of sandfixation. Wind velocity was measured at different locations and heights along the shrub belt and of the random distribution shrubs by using multiplesensor automatic anemoscope (GB 228) during windy season (from February to April). Statistical analysis indicated that when the cover was about 20%, the belt scheme of A. ordosica was more effective for wind breaking than its randomly distribution. Random distribution of the shrubs formed many \!narrow pipes" out of gaps between shrubs, which increased wind velocity, and resulted in greater wind velocity than that measured in the open. The flow field structure of the randomly distributed A. ordosica shrub was complicated and changeable, and the sand dunes was in status of the semi mobile or sem fixed, which allowed wind erosion and sand accumulation in the thin stands to occur. After eliminating maximum and minimum, soil surface roughness and friction speed were found to be about 4 and 1.3 times greater in the belt than in the randomly distributed shrubs, respectively, indicating that the belt scheme enhanced the function of preventing wind erosion and fixing drift sand

Key words: Artemisia ordosica, low cover, distributing pattern, windbreak effect