摘要
流沙地迎风坡上部及丘顶为风沙运动强烈区域,在其上种植花棒带作为植物沙障,可使地表粗糙度由0.014cm提高到0.642cm,地表起沙风速由8.8m/s提高到10.1m/s,可改变风沙流输沙率随高度的分布结构.实验测得0～20cm高度范围内风沙流输沙量较流沙地减少了80.2%,小气候及土壤等生态条件明显改善;在沙障带间栽植刺槐,成活率提高了58.4%,且生长情况良好.
In the shifting sand area, wind and sand activity is strong on hill slope facing the wind and on hill top. After planting of swectvetch belt barrier, the surface roughness is increased from 0. 014 cm to 0.642 cm, sand-lifting, wind speed from 8. 8 m/s to 10.1 m/s, and the distribution structure of sand transport rate with height is changed. According to experiment, within the height of 0-20 cm, sand transport is reduced by 75.8 %, and environment, soil and other ecological conditions are obviously improved. The survival rate of locust planted between the belt barriers increases by 58. 4%, and it grows well.
出处
《中国水土保持》
1997年第4期23-25,共3页
Soil and Water Conservation in China
关键词
流沙地
沙障
花棒沙障带
防风固沙
生态环境
shifting sand area sweetvetch belt barrier wind-resistant and sand-fixing ecological environment
