干旱区生态环境知识资源中心(Arid): Soil fixation and erosion control by Haloxylon persicum roots in arid lands, Iran

Arid

	Soil fixation and erosion control by Haloxylon persicum roots in arid lands, Iran
	Abdi Ehsan; Saleh Hamid R; Majnonian Baris; Deljouei Azade
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2019
卷号	11 期号:1 页码:86-96
英文摘要	Vegetation roots contribute to soil fixation and reinforcement, thus improving soil resistance against erosion. Generally, the amount of soil fixation presented by roots mainly depends on root density and tensile strength. In the present study, we conducted the research in order to further understand the biotechnical properties of Haloxylon persicum and also to quantify its role in increasing soil cohesion in arid lands of Iran. Ten H. persicum shrubs were randomly selected for root distribution and strength investigations, in which five samples were set on flat terrain and other five samples on a moderate slope terrain. The profile trench method was used to assess the root area ratio (RAR) as the index of root density and distribution. Two profiles were dug around each sample, up and downslope for sloped treatment and north and south sides for flat treatment. The results showed that RAR increased with increasing soil depth and significantly decreased in 40-50 cm layers of downhill (0.320%) and 50-60 cm for uphill (0.210%). The minimum values for the northward and southward profiles were 0.003 %and 0.003%, respectively, while the maximum values were 0.260 %and 0.040%, respectively. The relationship between the diameter of root samples and root tensile strength followed a negative power function, but tensile force increased with increasing root diameter following a positive power function. The pattern of increased cohesion changes in soil profile was relatively similar to RAR curves. The maximum increased cohesion due to the presence of roots in uphill and downhill sides were 0.470 and 1.400 kPa, respectively. In the flat treatment, the maximum increased cohesions were 0.570 and 0.610 kPa in northward and southward profiles, respectively. The analysis of variance showed that wind and slope induced stresses did not have any significant effect on the amount of increased cohesion of H. persicum. The findings served to develop knowledge about biotechnical properties of H. persicum root system that can assist in assessing the efficiency of afforestation and restoration measures for erosion control in arid lands.
英文关键词	biotechnical properties increased soil cohesion profile trench method root area ratio (RAR) tensile strength
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Forestry
CSCD记录号	CSCD:6487026
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336101
作者单位	Abdi Ehsan, Department of Forestry and Forest Economics, Faculty of Natural Resources, University of Tehran, Karaj, 31587-77871, Iran.; Saleh Hamid R, Department of Forestry and Forest Economics, Faculty of Natural Resources, University of Tehran, Karaj, 31587-77871, Iran.; Majnonian Baris, Department of Forestry and Forest Economics, Faculty of Natural Resources, University of Tehran, Karaj, 31587-77871, Iran.; Deljouei Azade, Department of Forestry and Forest Economics, Faculty of Natural Resources, University of Tehran, Karaj, 31587-77871, Iran.
推荐引用方式 GB/T 7714	Abdi Ehsan,Saleh Hamid R,Majnonian Baris,et al. Soil fixation and erosion control by Haloxylon persicum roots in arid lands, Iran[J],2019,11(1):86-96.
APA	Abdi Ehsan,Saleh Hamid R,Majnonian Baris,&Deljouei Azade.(2019).Soil fixation and erosion control by Haloxylon persicum roots in arid lands, Iran.Journal of Arid Land,11(1),86-96.
MLA	Abdi Ehsan,et al."Soil fixation and erosion control by Haloxylon persicum roots in arid lands, Iran".Journal of Arid Land 11.1(2019):86-96.