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以3~4年生柠条和沙棘根为研究对象,采用悬臂梁试验对同径级的直段根和侧根分支处进行弯曲试验。结果表明:2种植物同径级直段根和侧根分支处抗弯力与直径均呈幂函数正相关关系,而抗弯强度随直径变化无明显规律,在均值左右波动;多数径级范围,同种植物间平均抗弯力和平均抗弯强度均表现为直根段大于侧根分支处;相同径级时,当直根段和侧根分支处直径>2.5mm时,2种植物直段根和侧根分支处抗弯力和抗弯强度的种间比较均表现为柠条>沙棘;柠条直段根抗弯强度约为沙棘直段根抗弯强度的1.12倍,柠条侧根分支处抗弯强度约为沙棘侧根分支处抗弯强度的1.04倍。
Taking 3 ~ 4 years old Caragana korshinskii and Seabuckthorn root as the research object, the bending test was conducted on the branches of straight segments and lateral roots with the same diameter using the cantilever test. The results showed that there was a positive power function correlation between the bending strength and the diameter of straight branches and lateral branches of the two plants. However, the bending strength did not change obviously with the diameter and fluctuated around the mean value. The average bending strength and average bending strength of the same species showed that the root segments were larger than those of the lateral roots. When the diameters of the root segments and lateral roots were more than 2.5 mm, The comparison of the bending strength and flexural strength of the branch showed that the Caragana> Seabuckthorn; the root bending strength of the Caragana intermedia was about 1.12 times that of the Seabuckthorn straight section, the bending strength It is about 1.04 times of bending strength of lateral root of seabuckthorn.