基于根系化学组成的抗拉力学特性分析

张乔艳; 唐丽霞; 潘露; 陈龙

doi:10.3969/j.issn.1000-2006.201812054

基于根系化学组成的抗拉力学特性分析

张乔艳, 唐丽霞, 潘露, 陈龙

南京林业大学学报（自然科学版） ›› 2020, Vol. 44 ›› Issue (1) : 186-192.

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南京林业大学学报（自然科学版） ›› 2020, Vol. 44 ›› Issue (1) : 186-192. DOI: 10.3969/j.issn.1000-2006.201812054

研究论文

基于根系化学组成的抗拉力学特性分析

作者信息 +

Tensile mechanical properties of roots based on chemical composition

Author information +

文章历史 +

摘要

【目的】分析根系力学特性与化学组成的关系,揭示根系固土的机理,为边坡的生态修复预测及树种优化提供理论基础。【方法】以贵州省石漠化土层浅薄地区乡土树种火棘(Pyracantha fortuneana)和刺鼠李(Rhamnus dumetorum Schneid)为研究对象,通过对根系木质素、纤维素和半纤维素含量及根系抗拉特性的测定,结合根系横截面的表观形态分析,从更为微观的角度分析根系固土护坡机制。【结果】根系力学性质与根径间存在明显的尺寸效应,根径越大,极限抗拉力越大,极限抗拉强度和极限延伸率越小。随着根径的增加,纤维素和半纤维素含量呈增加趋势,木质素含量呈减小趋势。其中火棘木质素含量高于刺鼠李,纤维素含量低于刺鼠李。木质素含量越高,根系极限抗拉力和极限抗拉强度越大,纤维素和半纤维素含量越高,极限延伸率越小。纤维素、半纤维素和木质素在微观的化学结构上韧性和强度可能对根系宏观的力学特性有较大影响。根系在微观结构方面具有与木材一样的微观“多孔结构”,从而对根系产生一定的增韧作用。【结论】根系的木质素、纤维素和半纤维素均对根系的抗拉力学性能有一定影响,在一定程度上揭示了影响根系力学性质内在因素。

Abstract

【Objective】 The aim of this study was to gain an understanding of the relationship between the chemical composition and mechanical properties of roots. 【Method】 We determined the tensile strength of roots, measured the contents of chemical components, including cellulose, hemicellulose and lignin; and assessed the surface appearance of the roots, with a view toward elucidating the protection mechanism of roots in the soil from a microscopic perspective. 【Result】 ① We found that root diameter had a considerable effect on tensile strength, namely, the larger the root diameter, the higher is the ultimate tensile force, and the smaller are the ultimate tensile strength and ultimate elongation. ② The effects of root diameter on chemical composition were consistent with those of mechanical properties, with the contents of cellulose and hemicellulose increasing, whereas that of lignin showed a decrease. Furthermore, we found that whereas the lignin content ofPyracantha fortuneana was higher than that of Rhamnus dumetorum Schneid, the cellulose content showed the opposite pattern. ③ In terms of toughness and strength, the microscopic chemical structures of cellulose, hemicellulose and lignin had a marked influence on the macroscopic mechanical properties of roots, with a higher lignin content being associated with a greater ultimate tensile strength and tensile resistance, and higher contents of cellulose and hemicellulose being associated with a smaller ultimate elongation. ④ The surface of roots at the microscopic level was observed to be a “porous structure,” similar to that of the wood, and accordingly is assumed to confer the root system with mechanical strength.【Conclusion】 Collectively, our results revealed that inherent factors that influence the mechanical properties of the root to a certain degree provide a theoretical basis for the selection and optimization of tree species for ecological restoration of slope landscapes.

导出引用

张乔艳, 唐丽霞, 潘露, 等. 基于根系化学组成的抗拉力学特性分析[J]. 南京林业大学学报（自然科学版）. 2020, 44(1): 186-192 https://doi.org/10.3969/j.issn.1000-2006.201812054

ZHANG Qiaoyan, TANG Lixia, PAN Lu, et al. Tensile mechanical properties of roots based on chemical composition[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2020, 44(1): 186-192 https://doi.org/10.3969/j.issn.1000-2006.201812054

中图分类号： S718.3

参考文献

列表( 原文顺序 | 文献年度倒序 | 文中引用次数倒序 ) 可视化分析

[1]	吕春娟, 陈丽华, 周硕, 等. 不同乔木根系的抗拉力学特性[J]. 农业工程学报, 2011, 27(S1):329-335. LÜ C J, CHEN L H, ZHOU S, et al. Root mechanical characteristics of different tree species[J]. Transactions of the CSAE, 2011, 27(S1):329-335. 本文引用 [4]

[2]	陈丽华. 林木根系固土力学机制[M]. 北京: 科学出版社, 2008. CHEN L H. Mechanical mechanism of forest root soil fixation [M]. Beijing: Science Press, 2008. 本文引用 [1]

[3]	毛伶俐. 生态护坡中植被根系的力学分析[D]. 武汉: 武汉理工大学, 2007. MAO L L. The mechanical analysis of vegetation root in ecological slope prote ction[D]. Wuhan: Wuhan University of Technology, 2007. 本文引用 [1]

[4]	左志严. 5种植物根系力学特性及其对土壤水分的响应[D]. 呼和浩特: 内蒙古农业大学, 2017. ZUO Z Y. Mechanical properties of 5 plant roots and the response to soil moisture[D]. Hohhot: Inner Mongolia Agricultural Uuniversity, 2017. 本文引用 [1]

[5]	朱海丽. 植物根系固土护坡微观机理分析[J]. 科学与财富, 2015, 30(11):289-290. ZHU H L. Microcosmic analysis on soil fixation and slop protection by root system[J]. Science and fortune, 2015, 30(11):289-290. 本文引用 [1]

[6]	张云伟, 惠尚, 卜晓磊, 等. 3种散生竹的单根抗拉力学特性[J]. 林业科学, 2013, 49(7):183-187. ZHANG Y W, HUI S, BO X L, et al. Mechanical characteristics of tensile strength for three monopodial bamboo single roots[J]. Scientia Silvae Sinicae, 2013, 49(7):183-187. 本文引用 [1]

[7]	李云鹏, 张会兰, 王玉杰, 等. 针叶与阔叶树根系对土壤抗剪强度及坡体稳定性的影响[J]. 水土保持通报, 2014, 34(1):40-45. LI Y P, ZHANG H L, WANG Y J, et al. effect of acerda and broad leaved tree roots on soil shear strength and slope stability[J]. Soil and Water Conservation Bulletin, 2014, 34(1):40-45. 本文引用 [1]

[8]

杨维西, 黄治江. 黄土高原九个水土保持树种根的抗拉力[J]. 中国水土保持, 1988, 8(9):49-51.

YANG

W X

, HUANG

Z J

. Tensile resistance of tree roots of nine soil and water conservation species in Loess Plateau[J]. China Soil and Water Conservation, 1988, 8(9):49-51. DOI: 10.14123/j.cnki.swcc.1988.09.013.

https://doi.org/10.14123/j.cnki.swcc.1988.09.013

本文引用 [1]

[9]

赵丽兵, 张宝贵. 紫花苜蓿和马唐根的生物力学性能及相关因素的试验研究[J]. 农业工程学报, 2007, 23(9):7-12.

ZHAO

L B

, ZHANG

B G

. Experimental study on root bio-mechanics and relevant factors of Medicago sativa and Digitaria sanguinalis [J]. Transactions of the Chinese Society of Agricultural Engineering, 2007, 23(9):7-12. DOI: 10.3321/j.issn:1002-6819.2007.09.002.

https://doi.org/10.3321/j.issn:1002-6819.2007.09.002

本文引用 [4]

[10]

TOSI

. Root tensile strength relationships and their slope stability implications of three shrub species in the Northern Apennines (Italy)[J]. Geomorphology, 2007, 87(4):268-283. DOI: 10.1016/j.geomorph.2006.09.019.

https://doi.org/10.1016/j.geomorph.2006.09.019

https://linkinghub.elsevier.com/retrieve/pii/S0169555X06004478

本文引用 [1]

[11]

COMINO

, MARENGO

. Root tensile strength of three shrub species: Rosa canina, Cotoneaster dammeri and Juniperus horizontalis[J]. Catena, 2010, 82(3):227-235. DOI: 10.1016/j.catena.2010.06.010.

https://doi.org/10.1016/j.catena.2010.06.010

https://linkinghub.elsevier.com/retrieve/pii/S0341816210001001

本文引用 [1]

[12]	NILAWEERA N S, NUTALAYA P. Role of tree roots in slope stabilisation[J]. Bulletin of Engineering Geology and the Environment, 1999, 57(4):337-342. DOI: 10.1007/s100640050056. https://doi.org/10.1007/s100640050056 http://link.springer.com/10.1007/s100640050056 本文引用 [1]

[13]

ZHANG

C B

, CHEN

L H

, JIANG

. Why fine tree roots are stronger than thicker roots: The role of cellulose and lignin in relation to slope stability[J]. Geomorphology, 2014, 206:196-202. DOI: 10.1016/j.geomorph.2013.09.024.

https://doi.org/10.1016/j.geomorph.2013.09.024

https://linkinghub.elsevier.com/retrieve/pii/S0169555X13004984

本文引用 [1]

[14]	BISCHETTI G B, CHIARADIA E A, EPIS T, et al. Root cohesion of forest species in the Italian Alps[J]. Plant and Soil, 2009, 324(1/2):71-89. DOI: 10.1007/s11104-009-9941-0. https://doi.org/10.1007/s11104-009-9941-0 http://link.springer.com/10.1007/s11104-009-9941-0 本文引用 [1]

[15]	李可, 朱海丽, 宋路, 等. 青藏高原两种典型植物根系抗拉特性与其微观结构的关系[J]. 水土保持研究, 2018, 25(2):240-249. LI K, ZHU H L, SONG L, et al. Relationship between tensile strength and microstructure of roots of two typical plants in Qinghai-Tibet Plateau[J]. Research of Soil and Water Conservation, 2018, 25(2):240-249. 本文引用 [1]

[16]	蒋坤云, 陈丽华, 盖小刚, 等. 华北护坡阔叶树种根系抗拉性能与其微观结构的关系[J]. 农业工程学报, 2013, 29(3):115-123. JIANG K Y, CHEN L H, GAI X G, et al. Relationship between tensile properties and microstructures of three different broadleaf tree roots in North China[J]. Journal of Agricultural Engineering, 2013, 29(3):115-123. 本文引用 [1]

[17]

蒋坤云, 陈丽华, 杨苑君, 等. 华北油松、落叶松根系抗拉强度与其微观结构的相关性研究[J]. 水土保持学报, 2013, 27(2):8-12.

JIANG

K Y

, CHEN

L H

, YANG

Y J

, et al. Relationship between tensile strength and selected anatomical features of two different conifer species’ roots in North China[J]. Journal of Soil and Water Conservation, 2013, 27(2):8-12, 19. DOI: 10.13870/j.cnki.stbcxb.2013.02.053.

https://doi.org/10.13870/j.cnki.stbcxb.2013.02.053

本文引用 [2]

[18]	李宁. 四种乔木根系抗拉特性的影响因素研究[D]. 北京:北京林业大学, 2016. LI N. Study on the iinfluence factors of root tensile properties by four arbor root system[D]. Beijing: Beijing Forestry University, 2016. 本文引用 [1]

[19]

SLUITER

J B

, RUIZ

R O

, SCARLATA

C J

, et al. Compositional analysis of lignocellulosic feedstocks. 1: review and description of methods[J]. Journal of Agricultural and Food Chemistry, 2010, 58(16):9043-9053. DOI: 10.1021/jf1008023.

https://doi.org/10.1021/jf1008023

https://pubs.acs.org/doi/10.1021/jf1008023

本文引用 [1]

[20]

高华端, 孙泉忠, 袁勇. 喀斯特地区不同土地利用类型土壤侵蚀特征研究[J]. 水土保持通报, 2010, 30(2):92-96.

GAO

H D

, SUN

Q Z

, YUAN

. Characteristics of soil erosion for different land types in Karst areas[J]. Bulletin of Soil and Water Conservation, 2010, 30(2):92-96. DOI: 10.13961/j.cnki.stbctb.2010.02.024.

https://doi.org/10.13961/j.cnki.stbctb.2010.02.024

本文引用 [1]

[21]	刘国彬, 蒋定生, 朱显谟. 黄土区草地根系生物力学特性研究[J]. 水土保持学报, 1996, 2(3):21-28. LIU G B, JIANG D S, ZHU X M. Study on grasses root bio-mechanics in Loess Plateau[J]. Journal of Soil and Water Conservation, 1996, 2(3):21-28. 本文引用 [2]

[22]	徐有朋. 木材学[M]. 北京: 中国林业出版社. 2006. XU Y P. Wood Science [M]. Beijing: China Forestry Publishing House, 2006. 本文引用 [1]

[23]	NORSTRÖM E, FOGELSTRÖM L, NORDQVIST P, et al. Xylan-a green binder for wood adhesives[J]. European Polymer Journal, 2015, 67(4):483-493. DOI: 10.1016/j.eurpolymj.2015.02.021. https://doi.org/10.1016/j.eurpolymj.2015.02.021 https://linkinghub.elsevier.com/retrieve/pii/S0014305715000968 本文引用 [1]

[24]	路瑶, 魏贤勇, 宗志敏, 等. 木质素的结构研究与应用[J]. 化学进展, 2013, 25(5):838-858. LU Y, WEI X Y, ZONG Z M, et al. Structural investigation and application of lignins[J]. Chemical Progress, 2013, 25(5):838-858. 本文引用 [1]

[25]	GENET M, STOKES A, SALIN F, et al. The influence of cellulose content on tensile strength in tree roots[J]. Plant and Soil, 2005, 278(1/2):1-9. DOI: 10.1007/s11104-005-8768-6. https://doi.org/10.1007/s11104-005-8768-6 http://link.springer.com/10.1007/s11104-005-8768-6 本文引用 [1]

[26]	刘明超, 陈常青. 基于细观力学的多孔材料断裂特性分析[C]// 航空科学与技术全国博士生学术论坛. 2016. LIU M C, CHEN C Q. Analysis of fracture characteristics of porous materials based on micromechanics[C]// national PhD student in aviation science and technology academic BBS, 2016. 本文引用 [1]

[27]	连广, 王庭魁, 戴澄月. X射线吸收法测定木材空隙度[J]. 林业科技, 1990, 7(1):43-44. LIAN G, WANG T K, DAI C Y. Determination of wood void by X-ray absorption method[J]. Forestry Technology, 1990, 7(1):43-44. 本文引用 [1]

[28]	张波. 马尾松木材管胞形态及微力学性能研究[D]. 北京: 中国林业科学研究院, 2007. ZHANG B. Study on the morphology and micromechanical properties of wood tracheid of masson pine[D]. Beijing:Chinese Academy of Forestry Sciences, 2007. 本文引用 [1]