Effects of Vegetation Restoration Age on Shear Strength of Root-soil System in Hilly and Gully Region of the Loess Plateau

XING Shukun; ZHANG Guanghui; ZHU Pingzong

doi:10.13870/j.cnki.stbcxb.2021.04.007

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Effects of Vegetation Restoration Age on Shear Strength of Root-soil System in Hilly and Gully Region of the Loess Plateau

更新时间：2025-03-12

- Effects of Vegetation Restoration Age on Shear Strength of Root-soil System in Hilly and Gully Region of the Loess Plateau
- Vol. 35, Issue 4, Pages: 41-48(2021)
- 作者机构：
  
  1. 北京师范大学地理科学学部,北京,100875
  2. 北京师范大学地表过程与资源生态国家重点实验室,北京,100875
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.04.007
  CLC： S157.1
- Published：2021
- 稿件说明：
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XING Shukun, ZHANG Guanghui, ZHU Pingzong. Effects of Vegetation Restoration Age on Shear Strength of Root-soil System in Hilly and Gully Region of the Loess Plateau[J]. 2021, 35(4): 41-48.
DOI：

XING Shukun, ZHANG Guanghui, ZHU Pingzong. Effects of Vegetation Restoration Age on Shear Strength of Root-soil System in Hilly and Gully Region of the Loess Plateau[J]. 2021, 35(4): 41-48. DOI： 10.13870/j.cnki.stbcxb.2021.04.007.

摘要

退耕还林（草）工程的有效实施，导致黄土高原植被迅速恢复，势必会引起植物根系和土壤理化性质变化，影响根—土复合体抗剪强度。为探究植被恢复年限对根—土复合体抗剪强度的潜在影响，在陕西省安塞区纸坊沟小流域选择6个不同退耕年限（5，12，20，27，37，46年）的撂荒地和1个坡耕地，进行不同土层深度（0—10，10—20，20—30，30—40，40—50 cm）根—土复合体原位剪切试验，同时测定根系特性和土壤理化性质。结果表明，随着退耕年限增加，0—50 cm土层根—土复合体抗剪强度均值呈"S"形增大趋势（51.80~124.01 J/m2），与坡耕地相比，抗剪强度依次增加2.5%，54.6%，48.7%，86.5%，139.4%和129.3%。除坡耕地外，随着土层深度增加，根系密度明显减少，根—土复合体抗剪强度逐渐下降。根—土复合体抗剪强度与土壤有机质含量、根长密度和根质量密度呈对数正相关关系，与团聚体稳定性和有效根密度呈线性正相关关系。通径分析表明，团聚体稳定性、根质量密度和有机质含量是影响根—土复合体抗剪强度的关键因素。研究结果为评估植被恢复的水土保持效益及生态服务功能、揭示根—土复合体抗剪强度随退耕年限变化的动力机制提供理论基础。

Abstract

The effective implementation of the "grain-for-green" project has rapidly restored vegetation on the Loess Plateau

which will inevitably trigger the changes in plant roots and soil physical and chemical properties

and further affect the shear strength of root-soil system. To investigate the potential impacts of vegetation restoration age on shear strength of root-soil system

six abandoned farmlands with different restoration age (5

37 and 46 years) and a slope farmland were selected as testing sites in Zhifanggou small watershed in Ansai

Shaanxi province. The in-situ shear tests were conducted in five different soil depths (0—10

10—20

20—30

30—40

40—50 cm)

and root characteristics and soil physical and chemical properties were measured simultaneously. The results showed that the average shear strength of 0—50 cm soil layers increased as a sigmoid curve from 51.80 J/m2 to 124.01 J/m2 with the increasing of vegetation restoration age. Compared with slope farmland

the shear strength of root-soil system increased by 2.5%

54.6%

48.7%

86.5%

139.4% and 129.3% for abandoned farmlands with different restoration ages

respectively. The root density decreased significantly with the increasing of soil depth in the abandoned farmlands

which induced decrease in the shear strength of root-soil system. The shear strength of root-soil system was logarithmically positively correlated with organic matter content

root length density and root mass density

and linearly positively correlated with aggregate stability and root density. Path analysis showed that aggregate stability

root mass density and organic matter content were the key factors affecting the shear strength of root-soil system. The results could provide a theoretical basis for evaluating water and soil conservation benefit and ecological service functions of vegetation restoration

and revealing the dynamic mechanism of changes in shear strength of root-soil system with the vegetation restoration age.

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references

胡夏嵩,李国荣,朱海丽,等.寒旱环境灌木植物根-土相互作用及其护坡力学效应[J].岩石力学与工程学报,2009,28(3):613-620.

Badhon F F, Islam M S, Al-Hussaini T M. Study of root-reinforcement effect on shear strength parameters of soil obtained by direct shear tests[C]//Proceedings, International Conference on Disaster Risk Mitigation, Dhaka, Bangladesh,2019.

Comino E, Druetta A. In situ shear tests of soil samples with grass roots in Alpine environment[J].American Journal of Environmental Sciences,2009,5(4):475-486.

Tan H M, Chen F M, Chen J, et al. Direct shear tests of shear strength of soils reinforced by geomats and plant roots[J].Geotextiles and Geomembranes,2019,47(6):780-791.

Giadrossich F, Schwarz M, Cohen D, et al. Methods to measure the mechanical behaviour of tree roots:A review[J]. Ecological Engineering, 2017,109:256-271.

Fan C, Tsai M. Spatial distribution of plant root forces in root-permeated soils subject to shear[J].Soil and Tillage Research,2016,156:1-15.

陈丽华,余新晓,宋维峰,等.林木根系固土力学机制[M].北京:科学出版社,2008.

Yildiz A, Graf F, Rickli C, et al. Determination of the shearing behaviour of root-permeated soils with a large-scale direct shear apparatus[J].Catena,2018,166:98-113.

Fan C C, Su C F. Role of roots in the shear strength of root-reinforced soils with high moisture content[J].Ecological Engineering,2008,33(2):157-166.

Comino E, Druetta A. In situ shear tests of soil samples with grass roots in Alpine environment[J].American Journal of Environmental Sciences,2009,5(4):475-486.

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.

李婷,吕一河,任艳姣,等.黄土高原植被恢复成效及影响因素研究[J].生态学报,2020,40(23):8593-8605.

Li J J, Li Z, Lü Z M. Analysis of spatiotemporal variations in land use on the Loess Plateau of China during 1986-2010[J].Environmental Earth Sciences,2016,75(11):997-1009.

张光辉.退耕驱动的近地表特性变化对土壤侵蚀的潜在影响[J].中国水土保持科学,2017,15(4):143-154.

Wang B, Zhang G H, Yang Y F, et al. The effects of varied soil properties induced by natural grassland succession on the process of soildetachment[J].Catena,2018,166:192-199.

师阳阳,陈云明,张光辉,王兵.不同退耕年限撂荒地植物多样性及生物量分析[J].水土保持研究,2012,19(6):36-40,44.

Wang H, Zhang G H, Li N N, et al. Variation in soil erosion resistance of slips deposition zone with progressive vegetation succession on the Loess Plateau, China[J].Journal of Soils and Sediments,2020,20(1):234-248.

杨寒月,张光辉,张宝军.黄土丘陵沟壑区沟坡典型植物群落生长特征[J].水土保持研究,2019,26(2):62-67.

Ekanayake J C, Phillips C J. A method for stability analysis of vegetated hillslopes:An energy approach[J].Canadian Geotechnical Journal,1999,36(6):1172-1184.

李勇,朱显谟,田积莹.黄土高原植物根系提高土壤抗冲性的有效性[J].科学通报,1991(12):935-938.

Ghestem M, Veylon G, Bernard A, et al. Influence of plant root system morphology and architectural traits on soil shear resistance[J].Plant and Soil,2014,377(1/2):43-61.

Comino E, Druetta A. The effect of

Poaceae

roots on the shear strength of soils in the Italian alpine environment[J].Soil and Tillage Research,2010,106(2):194-201.

Mickovski S B, Hallett P D, Bransby M F, et al. Mechanical reinforcement of soil by willow roots:Impacts of root properties and root failure mechanism[J].Soil Science Society of America Journal,2009,73(4):1276-1285.

赵丽兵,张宝贵,苏志珠.草本植物根系增强土壤抗剪切强度的量化研究[J].中国生态农业学报,2008,16(3):718-722.

管孝艳,王少丽,高占义,等.盐渍化灌区土壤盐分的时空变异特征及其与地下水埋深的关系[J].生态学报,2012,32(4):198-206.

Gonzalez-Ollauri A, Mickovski S B. Plant-soil reinforcement response under different soil hydrological regimes[J].Geoderma,2017,285:141-150.

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