|Table of Contents|

Effect of Loading Rate and Moisture Content on the Anti-fracture Strength of Straight Roots of Four Plant Species(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2016年06
Page:
70-73
Research Field:
Publishing date:

Info

Title:
Effect of Loading Rate and Moisture Content on the Anti-fracture Strength of Straight Roots of Four Plant Species
Author(s):
ZHU Honghui1; LIU Jing1; ZHANG Xin2; SU Yu1; WANG Chenjia1; LI Xuesong1
(1.Institute of Ecological Environment，Inner Mongolia Agricultural University，Hohhot，Inner Mongolia 010010；2.Institute of Water Resource for Pasturing Area of the Ministry of Water Resources，Hohhot，Inner Mongolia 010010)
Keywords:
loading rate; soil moisture content; roots moisture content; anti-fracture strength
PACS:
-
DOI:
10.11937/bfyy.201606018
Abstract:
The anti-fracture strength of straight roots of four plant species were measured by the Multifunctional Electronic Pull Test Machine of TY8000 in vigorous loading rates and vigorous moisture content seasons.The four plant species were the vegetation species of Caragana korshinskii，Salix psammophila，Artemisia sphaerocephala and Hippophae rhamnides.For the four plant species，the roots were selected from the corresponding plant age of 3-4-year-old.The results showed that the anti-fracture strength of straight roots of four plant species were positively correlated with the loading rate.The anti-fracture strength of the root under instantaneous breaking force (the loading rate of 500 mm/min and 860 mm/min) was significantly higher than that of the root under the slow breaking force (the loading rate of 10 mm/min) with the same diameter.Under the loading rate of 500 mm/min，the anti-fracture strength of 1.5-2.0 mm and 3.0-3.5 mm diameter class roots followed the sequence of Caragana ((58.30±7.45)MPa，(49.21±3.45)MPa)> Salix ((23.21±1.88)MPa，(19.12±2.95)MPa)>Hippophae ((7.79±1.06)MPa，(6.61±1.05)MPa)>Artemisia ((5.51±0.66)MPa，(4.43±0.38)MPa)；comparing with the strength of the roots mentioned above，the anti-fracture strength of the same diameter class occupied 87.1% and 83.7% for Caragana,82.8% and 86.8% for Salix，79.2% and 81.8% for Hippophae，90.0% and 73.6% for Artemisia under the loading rate of 10 mm/min.With the increase of soil moisture content，the root moisture content of four plant species increased and the anti-fracture strength had a tendency to reduce.The anti-fracture strength of 2.0-2.5 mm straight roots for the four species followed the sequence of Caragana ((60.05±7.00)MPa)> Salix ((25.99±2.88)MPa)>Hippophae ((8.52±1.17)MPa) >Artemisia ((5.85±0.63)MPa) under drying soil (soil moisture content was 0.0%).The anti-fracture strength of the same diameter class occupied 79.1% for Caragana，73.0% for Salix，74.3% for Hippophae and 65.1% for Artemisia.

References:

 

[1]POLLEN-BANKHEAD N，SIMON A，THOMAS R E.The reinforcement of soil by roots：recent advances and directions for future research [M]//SHROODER J.Treatise on geomorphology，volume 12：ecogeomorphology.New York：Academic Press，2013:107-124.

[2]ABDOLHOSSEIN K，FAISAL H A，NORMANIZA O.Contribution of the root to slope stability[J].Geotechnical and Geological Engineering，2012,30(2)：277-288.

[3]ZHANG C，JIANG J，MA J，et al.Evaluating soil reinforcement by plant roots using artificial neural networks[J].Soil Use and Management，2015，31(3):408-416.

[4]刘福全,刘静,姚喜军,等.根系固土主导力学因素初探与差异性评价[J].生态学报,2015(19):1-11.

[5]ZHANG C B，CHEN L H，JIANG J，et al.Effects of gauge length and strain rate on the tensile strength of tree roots[J].Trees，2012(26):1577-1584.

[6]刘玥,刘静,张格,等.二种植物同径级直段根和侧根分支处抗弯力学特性的研究[J].北方园艺,2014(19):16-19.

[7]YAO X J，WANG L H，LIU J，et al.Biomechanics and utility of shallow soil fixation by Sabina valgaris Ant.roots in arid and semiarid soils[J].Sensors and Transducers，2014,67(3):129-134.

[8]姚喜军,王林和,刘静,等.3种植物单根对土体残余抗剪强度影响的研究[J].干旱区资源与环境,2015,29(2)：110-114.

[9]邢会文,刘静,王林和,等.柠条、沙柳根与土及土与土界面摩擦特性[J].摩擦学报,2010,30(1):87-91.

[10]刘鹏飞,刘静,张格,等.四种植物生长旺盛期侧根分支处抗折特性研究[J].北方园艺,2015(17):58-61.

[11]苑淑娟.4种植物单根抗拉力学特性研究[D].呼和浩特:内蒙古农业大学,2010.

[12]张永亮.沙棘根系生物力学特性研究[D].呼和浩特:内蒙古农业大学,2011.

[13]刘晓敏.5种植物侧根分支处抗拉力学特性的研究[D].呼和浩特:内蒙古农业大学,2013.

[14]〖JP〗YUTAKA I，KAZUTOSHI A，MASATO M，et al.Physical and mechanical properties of wood after moisture conditioning[J].The Japan Wood Research Society，2001,47(3):185-191.

[15]刘杏娥,吕文华,郑雅娴.水分对棕榈藤材弯曲性能的影响[J].安徽农业大学学报,2014,41(6):934-938.

Memo

Memo:
-
Last Update: 2016-05-03