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[1]YANG Lu,DU Feng,QIN Jingjing,et al.Research on Shear Strengths of Root-Soil Complexes of Three Dominant Shrubs in Loess Region[J].Research of Soil and Water Conservation,2022,29(01):295-300+310.

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Research on Shear Strengths of Root-Soil Complexes of Three Dominant Shrubs in Loess Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 01 Page number: 295-300+310 Column: Public date: 2022-02-20

Title:: Research on Shear Strengths of Root-Soil Complexes of Three Dominant Shrubs in Loess Region

Author(s):: YANG Lu¹, DU Feng^1,2, QIN Jingjing¹, CHENG Shuai¹, LI Hongbin¹; (1.College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China)

Keywords:: shrub; root system; tensile strength; root-soil complex; shear strength

CLC:: S157.1

DOI:: -

Abstract:: Soil erosion in the loess region is serious. Ecological slope protection is a more respected protection method. In particular, shrubs have a developed root system and have obvious shear resistance enhancement to the soil with roots. Therefore, comparing the shear strengths of the root-soil complexes of the regionally suitable dominant shrubs under natural conditions is of great significance for the rational selection of soil-fixing and slope-protecting plants. We took three dominant native shrubs in Loess Region, Lespedeza dahurica, Hippophae rhamnoides and Sophora viciifolia as the research samples, tensile test of single roots with different diameters and shearing test of root-soil columns were conducted. The results showed that:(1)the root systems of Lespedeza dahurica, Hippophae rhamnoides and Sophora viciifolia mainly distributed in the 0—40 cm soil layer; their root length densities, root surface area densities and biomass densities showed overall decrease with the increase of soil depth;(2)the tensile resistances(TR)and tensile strengths(TS)of Lespedeza dahurica, Hippophae rhamnoides and Sophora viciifolia had the power function(aD^b)relations with the diameters(D), the tensile strength was positively correlated with the diameter(b>1), while the tensile strength was negatively correlated with the diameter(b<1);(3)the shear strengths of different shrubs root-soil complexes were different in the underground distribution; in the rhizosphere, the shear strength of Lespedeza dahurica root-soil complex showed a trend of first increasing, then decreasing, then increasing and decreasing with the increase of soil layer; the maximum shear strength was found in 20—30 cm and 50—70 cm soil layers; the shear strengths of root-soil complexes of Hippophae rhamnoides and Sophora viciifolia showed a trend of first increasing and then decreasing, the maximum shear strength was found in 30—50 cm and 0—20 cm soil layers, respectively. It can be seen that the fine roots of shrubs can better play the roles in soil consolidation and slope protection. It is suggested that Lespedeza davurica and Hippophae rhamnoides should be preferentially selected as slope protection plants in the loess area, so as to provide some references for ecological slope protection.

References:: [1] 梁亚红.黄土山区公路滑坡稳定性分析与防治研究[J].建材与装饰,2020(12):238-239.
[2] 张家明,陈积普,杨继清,等.中国岩质边坡植被护坡技术研究进展[J].水土保持学报,2019,33(5):1-7.
[3] 赵东晓,蔡建勤,土小宁,等.黄土高原水土保持植被建设问题及建议[J].中国水土保持,2020(5):7-9.
[4] Jiao Z, Wang D, Xie H, et al. Experimental analysis of shear strength of undisturbed soil in leucaena forest in Jiangjia Ravine, Yunnan, China[J]. Journal of Mountain Science, 2010,7(4):386-395.
[5] 唐娴.公路边坡植物防护的水土保持机理[J].水土保持研究,2006,13(5):64-65.
[6] 曹波,曹志东,王黎明,等.植物根系固土作用研究进展[J].水土保持应用技术,2009(1):26-28.
[7] 周云艳,陈建平,王晓梅.植物根系固土护坡机理的研究进展及展望[J].生态环境学报,2012,21(6):1171-1177.
[8] 王剑敏,沈烈英,赵广琦.中亚热带优势灌木根系对土壤抗剪切力的影响[J].南京林业大学学报:自然科学版,2011,35(2):47-50.
[9] Ali F H, Osman N. Shear strength of a soil containing vegetation roots[J]. Soils and Foundations, 2008,48(4):587-596.
[10] Pollen N. Temporal and spatial variability in root reinforcement of streambanks:Accounting for soil shear strength and moisture[J]. Catena, 2007,69(3):197-205.
[11] 李佳,汪霞,贾海霞,等.浅层滑坡多发区典型灌木根系对边坡土体抗剪强度的影响[J].生态学报,2019,39(14):5117-5126.
[12] 赵玉娇,胡夏嵩,李华坦,等.寒旱环境灌木根系增强边坡土体抗剪强度特征[J].农业工程学报,2016,32(11):174-180.
[13] 张晓明,王玉杰,夏一平,等.重庆缙云山典型植被原状土与重塑土抗剪强度研究[J].农业工程学报,2006,22(11):6-9.
[14] 王月,杜峰,周敏,等.陕北林草混交根土复合体抗剪强度研究[J].水土保持研究,2018,25(2):213-219.
[15] 李建兴,何丙辉,谌芸,等.不同护坡草本植物的根系分布特征及其对土壤抗剪强度的影响[J].农业工程学报,2013,29(10):144-152.
[16] 史敏华,王棣,李任敏.石灰岩区主要水保灌木根系分布特征与根抗拉力研究初报[J].山西林业科技,1994(1):17-19.
[17] 赵倩,伍红燕,宋桂龙,等.胡枝子和荆条不同植物配置的根系垂直空间分布特征[J].草业科学,2019,36(9):2183-2192.
[18] 潘天辉,杜峰,王月.陕北黄土区护坡植物根系分布和抗剪增强分析[J].水土保持研究,2020,27(3):357-363,371.
[19] 周萍,文安邦,严冬春,等.三峡库区紫色土坡耕地草本地埂植物根系分布及抗拉力学特征[J].水土保持通报,2017,37(3):1-6.
[20] 薛杨,赵洋毅,王克勤,等.磨盘山典型灌草根系抗拉力学特性及其影响因素研究[J].西南林业大学学报:自然科学,2019,39(2):99-107.
[21] 冯国建,沈凡,王世通.护坡植物根系分布特征及抗拉强度研究[J].重庆师范大学学报:自然科学版,2013,30(2):115-118.
[22] 徐洪雨,王英宇,宋桂龙,等.华北土石山区公路边坡常见植物根系地下分布特征[J].中国水土保持科学,2013,11(2):51-58.
[23] 朱海丽,胡夏嵩,毛小青,等.青藏高原黄土区护坡灌木植物根系力学特性研究[J].岩石力学与工程学报,2008,27(增2):3445-3452.
[24] 刘秀萍,陈丽华,宋维峰.林木根系与黄土复合体的抗剪强度试验研究[J].北京林业大学学报,2006,28(5):67-72.
[25] 周霞,魏杨,李东嵘,等.黄土区紫花苜蓿根系对土体抗剪性能的影响[J].中国水土保持科学,2019,17(2):53-59.
[26] 赵岩,周文渊,孙保平,等.毛乌素沙地3种荒漠灌木根系分布特征与土壤水分研究[J].水土保持研究,2010,17(4):129-133.

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Last Update: 2022-02-20