在解过程中,沙中的沙漠植物根的拔出行为和影响机制在化过程中
Xiaofei Yang1,2, Qinglin Li1,2, Shuailong Yu1,2
1College of Water Resources and Construction Engineering, Shihezi University, Shihezi 832000, China.
Plants (Basel, Switzerland)
|September 27, 2025
概括
在解的寒冷地区,土壤根的强度随着温度和含水量上升而显著下降. 根径通过树皮剥离或土壤脱落失败模式影响拉出力.
科学领域:
- 地质技术工程 地质技术工程
- 土壤科学 土壤科学
- 生态生态学 生态生态学
背景情况:
- 在解过程中,根-土壤接口的机械性能尚不清楚.
- 在寒冷和干旱地区,根部加强对于斜坡稳定至关重要.
研究的目的:
- 研究温度,土壤含水量和根径对解条件下根拔出行为的影响.
- 在寒冷和干旱的环境中阐明影响根土相互作用的机制.
主要方法:
- 使用了Alhagi sparsifolia根-粘土砂复合材料.
- 采用了内镜宏观观测,环境扫描电子显微镜 (ESEM),土壤水迁移测试和核磁共振 (NMR).
- 不同的温度 (-10°C至25°C),土壤初始含水量 (4-12%) 和根径 (4.50-5.05毫米).
主要成果:
- 随着水含量和温度的增加,峰值拉出力减少了95%以上.
- 根直径与拉出力有非单调的关系,与根皮剥离 (高湿度) 和部分土壤脱落 (低湿度) 失败模式有关.
- 在冰水过渡过程中,温度主导了强度损失,而水含量则影响了液态阶段的行为.
结论:
- 根土的强度对解过程中的温度和水含量变化非常敏感.
- 了解这些相互作用为生物工程在寒冷和干旱地区的斜坡稳定提供了基础.
相关概念视频
Responses to Drought and Flooding
11.9K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
11.9K
Responses to Heat and Cold Stress
14.7K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
14.7K
Responses to Salt Stress
14.5K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
14.5K
Adaptations that Reduce Water Loss
27.9K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
27.9K
Responses to Gravity and Touch
41.7K
Gravitropism: Plant Responses to Gravity
41.7K
Water and Mineral Acquisition
35.3K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
35.3K


