根强化和细胞外产品减少溪岸河流侵蚀
D J Smith1, T M Wynn-Thompson2, M A Stremler3
1School of Plant and Environmental Sciences, Virginia Tech, 220 Ag Quad Lane, Latham Hall Rm 512, Blacksburg, VA, 24061, USA.
The Science of the total environment
|July 1, 2023
概括
植物根和有机物质 (OM) 显著减少溪岸侵蚀. 结合根和OM,可以对河流侵蚀提供实质性的保护,这对于建模通道变化至关重要.
科学领域:
- 环境科学 环境科学
- 地质地质地质地质地质地
- 土壤科学 土壤科学
背景情况:
- 了解流银行侵蚀性对于预测通道形态变化至关重要.
- 河流侵蚀对河流系统和基础设施产生重大影响.
- 量化影响银行稳定的因素是一个关键的研究领域.
研究的目的:
- 评估植物根和土壤微生物对河岸对侵蚀的抵抗的综合影响.
- 研究根部存在和有机物质修改之间的协同关系,以减少土壤侵蚀.
- 评估根系与生化相互作用在溪侵蚀性中的作用.
主要方法:
- 建造了三个流水墙,模拟了无植物和根植的溪流.
- 创建土壤处理,包括未经修改,有机材料 (OM) 修改,无根,合成根和活根 (Panicum virgatum).
- 在模拟的河流条件下对处理方法的测试,以测量侵蚀率.
主要成果:
- 有机物质 (OM) 刺激了细胞外聚合物质 (EPS) 的产生,增加了耐侵蚀性.
- 只有合成根可以减少不同流速的土壤侵蚀.
- 综合合成根和OM修正案减少了超过86%的侵蚀,与活根治疗相匹配 (95-100%的减少).
结论:
- 根和有机碳之间的协同相互作用通过纤维增强和EPS生产来增强土壤对侵蚀的抵抗力.
- 根系生物化学相互作用与物理根系机制一样重要,可以减少溪侵蚀性.
- 这些发现对于准确建模道迁移和河岸稳定性至关重要.
相关概念视频
Responses to Drought and Flooding
10.8K
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.
10.8K
Design Example: Maintaining Level of an Embankment
95
Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
95
Corrosion of Reinforcement
218
The corrosion of steel reinforcement within concrete is a process influenced by the material's inherent properties and external factors. The high pH level of around 13, provided by calcium hydroxide present in concrete, initially protects the steel reinforcement by promoting the formation of a passive iron oxide layer on its surface.
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...
218
Adaptations that Reduce Water Loss
25.8K
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.
25.8K
Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal
2.3K
Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.
2.3K
Bioremediation
19.1K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
19.1K


