Study on tensile properties of Hippophae rhamnoides roots and prediction model of chemical composition in tailing areas

作者：Qingchao Yang, Zhe Hao, Xinxin Cao, Wenjing Cheng, Xiao Ming Wang, Da Teng, Dongxu Yang · 发表于：Scientific Reports · 年份：2025 · DOI：10.1038/s41598-025-23916-w · 被引用次数：1 · 研究领域：Tree Root and Stability Studies、Plant nutrient uptake and metabolism、Plant responses to water stress

This study aims to investigate the correlation between tensile mechanical properties and chemical composition of Hippophae rhamnoides roots at different growth stages within tailings dam restoration areas, and to establish predictive models. 1-year-old, 4-year-old, and 10-year-old H. rhamnoides root systems were selected as study subjects. Through single-root tensile tests and chemical composition analysis, principal component parameters were extracted using partial least squares regression (PLSR). Combined with support vector machine (SVM) for dimensionality reduction training, a PLSR-SVM prediction model was constructed. Accuracy comparison analysis was conducted on four different prediction models.Analysis of the correlation between tensile properties and chemical composition, along with model predictions, indicates: (1) Relationship between tensile properties and age: Both the average tensile force and tensile strength of H. rhamnoides root exhibit a decreasing trend with increasing age. Regarding size effects, root tensile force follows a power-law growth pattern with increasing root diameter, while tensile strength demonstrates a power-law decay characteristic. Distinct elastic-plastic characteristics are evident in individual root stress-strain curves. Root diameter at different ages shows a negative correlation with ultimate stress, independent of strain. (2) Correlation between tensile properties and chemical composition: The tensile strength of H. rhamnoides at diff...