Research on adaptability of slope-protecting plants in north of Shaanxi loess area(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2016年04期
- Page:
- 26-32
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Research on adaptability of slope-protecting plants in north of Shaanxi loess area
- Author(s):
- XU Rui; LI Xun-chang; WU Rui-fang; DONG Qi
- (1. School of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, Shaanxi, China; 2. Electronic Comprehensive Surveying Institute, Ministry of Information Industry, Xi’an 710054, Shaanxi, China)
- Keywords:
- road engineering; adaptability; loess slope; vegetation community structure; diversity index
- PACS:
- U419.4; U417.2
- DOI:
- -
- Abstract:
- Due to the fragile ecological environment and the influence of human engineering activities, the loess slope geological disasters such as landslides have been increasing in Loess Plateau. The loess slope protection by vegetation is the effective means for restoration ecology and geological disaster prevention. Based on the investigation of local natural growth plants on loess slope in north Shaanxi, the statistics of dominant families and genera as well as vegetation density were analyzed, and the vegetation community structure of loess slope was presented. The community species diversity characteristics were studied based on diversity index analysis, and the relative dominance of artemisia species on loess slope was presented. The results show that the vegetation species diversity is below the medium level in north Shaanxi, which accords with the slope vegetation composition characteristics of Loess Plateau semiarid areas; the drought and freezing tolerant plant types are the main varieties of loess slope vegetation; the plant quantity decreases with the increase of gradient or the decrease of soil moisture, but the relative dominance of artemisia species on loess slope increases; the empirical formulas of the relation between plant quantity and slope height and between slope height and proportion of artemisia species was proposed. Artemisia is the main varieties of loess slope naturally growing vegetation in north Shaanxi area, which is the suitable species for ecological restoration and slope protection. The research on its slope protection effect as well as growth characteristics plays an important role in loess slope stability and ecological restoration. Finally, based on the relative dominance under the influence of complex factors, the selection of vegetation type and structural design of ecoengineering for loess slope protection under different slope gradients are suggested, which provides a reliable basis for the design of plant protection to loess slope.
Last Update: 2016-07-28