水土保持学报2025，Vol.39Issue(4)：71-80,10.DOI:10.13870/j.cnki.stbcxb.2025.04.007
黄土高原典型灌草植物根系生物力学特性及其相互关系
Biomechanical Characteristics and Their Interrelationships of Root Systems of Typical Shrub and Herb Plants on the Loess Plateau
摘要
Abstract
[Objective]To explore the differences of roots biomechanical characteristics of different plants and the relationships between biomechanical characteristics.[Methods]Six common soil and water conservation shrub and herb plants on the Loess Plateau were selected.Their root morphology,chemical composition,and tensile properties,as well as their relationships,were systematically studied.[Results]1)The root diameter(D)of the six plants was mainly fine roots(<2 mm).The root length density(RLD),root surface area density(RSAD),and root mass density(RMD)at different soil depths showed significant differences(p<0.05).The D,RLD,RSAD and RMD of Bothriochloa ischaemum were significantly different from those of the other five plants(p<0.05).2)The average root tensile strength(Tr)of B.ischaemum was 6.83,15.03,30.15,7.01 and 14.15 times of that of Carex tristachya,Artemisia gmelinii,Artemisia giraldii,Caragana korshinskii,and Sophora viciifolia,respectively.Tr decreased with the increase of D,following a power function or exponential function.Additionally,the contents of cellulose,lignin,hemicellulose and holocellulose were 13.43%-52.12%,5.87%-26.31%,1.01%-32.18%and 17.60%-51.8%,respectively.There were significant differences in the chemical compositions and diameters among the roots of different plants(p<0.05).3)Plant root ultimate elongation(εmax)and Tr were significantly positively correlated with hemicellulose content(p<0.05),and D was significantly negatively correlated with the chemical composition,εmax and Tr(p<0.05).The total explanation of root morphology and chemical composition on root tensile resistance was 62.91%.[Conclusion]The results provide a scientific basis and theoretical guidance for the selection of native species and the internal mechanism of root-soil reinforcement for further ecological restoration on the Loess Plateau.关键词
植物根系/形态特性/抗拉特性/化学成分/黄土高原Key words
plant roots/morphological characteristics/tensile properties/chemical composition/the Loess Plateau分类
农业科技引用本文复制引用
苏雪萌,周正朝,刘俊娥,曹玉莹,刘均阳..黄土高原典型灌草植物根系生物力学特性及其相互关系[J].水土保持学报,2025,39(4):71-80,10.基金项目
国家自然科学基金项目(42277320,42077058) （42277320,42077058）
陕西省自然科学基金项目(2023-JC-JQ-27) （2023-JC-JQ-27）
中央高校专项(GK202309005) （GK202309005）
陕西省教育厅一般自然科学专项(24JK0375) （24JK0375）
陕西理工大学人才启动项目(X20240036) （X20240036）
