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非生长时期6种植物枝条的抗折力学特性
格日乐, 郝需婷, 苏日娜, 黄静, 崔天民
内蒙古农业大学 沙漠治理学院, 内蒙古 呼和浩特 010019
摘要:
[目的]对内蒙古自治区中西部非生长时期6种植物枝条抗折力学特性进行研究,为该区防风阻沙植物种的选择及其混交配置提供生物力学方面的科学参考。[方法]采用YG (B)026 H-250型织物强力机和自制夹具,室内进行枝条抗折试验,比较6种植物枝条抗折力和抗折强度,分析枝长和直径对抗折力学强度指标的影响。[结果]①在0.5~2.5 mm测试径级范围,6种植物枝条抗折力随直径的增加而增大,抗折强度则随直径的增加呈幂函数递减;②在测试径级0.5~2.5 mm范围内枝长在60 mm时柠条枝条抗折力、抗折强度最大,其值分别为51.700 N和33.510 MPa,枝长在80 mm时种间抗折力、抗折强度最大为柽柳,其值分别为61.777 N和30.821 MPa,枝长在100 mm时种间抗折力、抗折强度最大为沙柳,其值分别是62.237 N和33.156 MPa。[结论]6种植物枝条在非生长时期其抗折力和抗折强度随着直径、枝条长度的增加其变化特点表现不一致,表明植物种不同、枝长不同则对枝条抗折力、抗折强度的影响亦有差异,这也从另外一方面证明生态修复中只有实现多树种结合的修复方式才是最优水土保持功能实现的模式。
关键词:  非生长时期  枝条  抗折力  抗折强度
DOI:10.13961/j.cnki.stbctb.2019.04.010
分类号:Q947.6
基金项目:国家自然科学基金项目"梯度应力下植物根系在固土抗蚀受损后自修复的生物力学响应机制"(41867011);内蒙古自然科学基金项目(2017MS0407)
Flexural Mechanical Properties of 6 Plant Branches During Non-growth Period
Ge Rile, Hao Xuting, Su Rina, Huang Jing, Cui Tianmin
College of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010019, China
Abstract:
[Objective] The flexural mechanical properties of six plant branches during non-growth period in midwest area of Inner Mongolia were studied in order to provide a scientific reference for the selection of the wind-resistant and sand-reducing plant species and their mixed configuration.[Methods] By YG(B)026H-250 fabric strength machine and self-made clamps, the branch bending test was carried out indoors, and the anti-folding forceand flexural strength of the branches of the six plants were compared, and the influence of the branch length and diameter on the mechanical strength index was analyzed.[Results] ① In the range of 0.5~2.5 mm diameter, the bending strength of 6 kinds of plant branches increased with the increase of diameter, while the bending strength decreased in power function with the increase of diameter; ② The breaking strength and breaking strength of Caragana korshinskii branches were the largest when the branch length was 60 mm in the range of 0.5~2.5 mm, the values were 51.700 N and 33.510 MPa, respectively, the breaking strength and breaking strength of Tamarix chinensis branches were the largest when the branch length was 80 mm, the values were 61.777 N and 30.821 MPa, respectively, and the breaking strength and breaking strength of Salix cheilophila branches were the largest when the branch length was 100 mm, the values were 62.237 N and 33.156 MPa, respectively.[Conclusion] The anti-folding force and flexural strength of 6 plant shoots were inconsistent with the increase of diameter and length of shoots during non-growth period, indicated that the effects of anti-folding force and flexural strength of shoots were different in plant species and branch length. It also proved that the combination of multiple trees should be the optional choices to realize the soil and water conservation function especially in the ecological restoration.
Key words:  non-growing period  branch  anti-folding force  flexural strength