Biogeotechnics最新文献_第2页

Polymer-assisted soybean crude urease carbonate precipitation technique for soil improvement 聚合物辅助大豆粗脲酶碳酸酯沉淀改良土壤技术

Biogeotechnics Pub Date : 2024-11-17 DOI: 10.1016/j.bgtech.2024.100147

Zalfa Maulida Ihsani , Naoki Kinoshita , Hideaki Yasuhara , Heriansyah Putra

{"title":"Polymer-assisted soybean crude urease carbonate precipitation technique for soil improvement","authors":"Zalfa Maulida Ihsani , Naoki Kinoshita , Hideaki Yasuhara , Heriansyah Putra","doi":"10.1016/j.bgtech.2024.100147","DOIUrl":"10.1016/j.bgtech.2024.100147","url":null,"abstract":"<div><div>This study presents a sustainable approach to soil improvement by integrating polyvinyl alcohol (PVA) into the Soybean Crude Urease Carbonate Precipitation (SCU-CP) technique. The research aims to enhance SCU-CP, which utilizes soybean-derived urease to precipitate calcium carbonate, bonding soil particles and increasing strength. Challenges such as low solution viscosity and inconsistent carbonate precipitation are addressed by incorporating PVA, a biodegradable polymer that improves viscosity and retention. Comprehensive evaluations reveal significant findings: increasing PVA concentration enhances solution viscosity and results in higher calcium carbonate precipitation. Water retention assessments show that the PCP-1% treatment increases saturation water content (<em>w</em><sub><em>s</em></sub>) to 0.263 compared to 0.217 for untreated soil, while also reduces the air-entry value (α). Unconfined Compressive Strength (UCS) tests indicate substantial improvement for PCP-1%, achieving approximately 140 kPa, with values reaching 179 kPa after 28 days. Calcium carbonate content measurements reveal that SCU-CP exhibits a variable distribution (standard deviation of 1.13), while PCP-1% demonstrates a more uniform distribution (standard deviation of 0.60), indicating improved effectiveness. Durability assessments through wet-dry cycling show that SCU-CP experiences a mass loss of 36.5%, while PCP-1% retains only 5% mass loss and maintains a UCS values. SEM images indicate that SCU-CP forms spherical structures, whereas PCP-1% produces a more diverse and crystalline morphology, suggesting better nucleation and distribution. Overall, the polymer-assisted SCU-CP technique (PCP) demonstrates significant potential for effective soil improvement.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 4","pages":"Article 100147"},"PeriodicalIF":0.0,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of environmental conditions on the growth of Pleurotus ostreatus in sand 沙地环境条件对平菇生长的影响

Biogeotechnics Pub Date : 2024-11-03 DOI: 10.1016/j.bgtech.2024.100137

Emmanuel Salifu , Giuseppe Di Rauso Simeone , Giacomo Russo , Maria A. Rao , Gianfranco Urciuoli , Grainne El Mountassir

{"title":"Influence of environmental conditions on the growth of Pleurotus ostreatus in sand","authors":"Emmanuel Salifu , Giuseppe Di Rauso Simeone , Giacomo Russo , Maria A. Rao , Gianfranco Urciuoli , Grainne El Mountassir","doi":"10.1016/j.bgtech.2024.100137","DOIUrl":"10.1016/j.bgtech.2024.100137","url":null,"abstract":"<div><div><em>Pleurotus ostreatus,</em> a saprotrophic fungus, has been proposed for the remediation of organic contaminants in soils and more recently for modifying the hydraulic and mechanical behaviour of granular soils. The in situ performance of fungal-based biotechnologies will be controlled by the fungal growth and associated biochemical activity that can be achieved in soil. In this study, the influence of environmental conditions (temperature, degree of saturation), substrate type (lignocellulose and spent coffee grounds) and concentration on the mycelium growth of <em>P. ostreatus</em> in sand are investigated. Furthermore, the evolution of growth/survival indicators (respiration, ergosterol concentration) and enzymatic activity (laccase, manganese peroxidase) are investigated. Temperature was shown to have a strong influence on the growth of <em>P.ostreatus</em> in sand: growth was observed to be delayed at low temperatures (e.g. 5 °C), whereas growth was prevented at high temperatures (e.g. 35 °C). No growth was observed at very low degrees of saturation (<em>S</em><sub><em>r</em></sub><em>=</em>0% and 1.2%), indicating there is a critical water content required to support <em>P.ostreatus</em> growth. Within the mid-range of water contents tested radially, growth of <em>P.</em>ostreatus was similar. However, growth under saturated soil conditions was restricted to the air-water atmosphere due to the requirement for oxygen availability. Low substrate concentrations (1%–5%) resulted in high radial growth of <em>P.ostreatus</em>, whereas increasing substrate content further acted to reduce radial growth, but visual observations indicated that fungal biomass density increased. These results are important for understanding the feasibility of <em>P.ostreatus</em> growth under specific site conditions and for the design of successful treatment strategies.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 2","pages":"Article 100137"},"PeriodicalIF":0.0,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soil-water retention capacity of expansive soil improved through enzyme induced carbonate precipitation-eggshell powder 酶促碳酸盐沉淀-蛋壳粉提高膨胀土的保水性

Biogeotechnics Pub Date : 2024-10-25 DOI: 10.1016/j.bgtech.2024.100146

Yunlong Liu , Yanyan Xia , Mudassir Mehmood , Lei Wang , Wen Nie , Yingao Zhao , Zhencai Luo

{"title":"Soil-water retention capacity of expansive soil improved through enzyme induced carbonate precipitation-eggshell powder","authors":"Yunlong Liu , Yanyan Xia , Mudassir Mehmood , Lei Wang , Wen Nie , Yingao Zhao , Zhencai Luo","doi":"10.1016/j.bgtech.2024.100146","DOIUrl":"10.1016/j.bgtech.2024.100146","url":null,"abstract":"<div><div>Enzyme Induced Carbonate Precipitation (EICP) has been extensively investigated as a promising approach to improve engineering properties of soil, while Eggshell Powder (ESP) is an agricultural waste that effectively fills soil pores. The ESP provides abundant nucleation at sites for the EICP process, further promoting the effective precipitation of calcium carbonate. The research presented in this paper investigated the Soil Water Characteristic Curves (SWCC), permeability coefficient, and microstructure of expansive soil before and after EICP and EICP+ESP modification. A series of laboratory experiments were conducted, including soil water characteristic tests, permeability tests and Scanning Electron Microscopy (SEM). The results proved that the addition of EICP and EICP+ESP into natural expansive soil resulted in a gradual decline in air entry value, residual water content, and permeability coefficient, indicating an increase in water retention capacity and a decrease in permeability. Furthermore, with the intrusion of EICP and EICP+ESP, the contact between particles becomes smoother, and the soil pores become more equally distributed. Ultimately, there was an enhancement in water retention capacity of the natural expansive soil. This study emphasizes the synergistic potential of combining EICP and EICP+ESP as stabilizing additives to enhance the water retention capacity of expansive soil. Moreover, the reuse of ESP provides a sustainable solution for the resource utilization of agricultural waste and the improvement of expansive soil using bio-inspired methods.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 3","pages":"Article 100146"},"PeriodicalIF":0.0,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physical property of MICP-treated calcareous sand under seawater conditions by CPTU 用 CPTU 分析海水条件下经 MICP 处理的钙质砂的物理性质

Biogeotechnics Pub Date : 2024-10-22 DOI: 10.1016/j.bgtech.2024.100131

Kemeng Yu, Yuling Ran, Jie Shi, Menglan Duan, Zhongkun Ouyang

{"title":"Physical property of MICP-treated calcareous sand under seawater conditions by CPTU","authors":"Kemeng Yu, Yuling Ran, Jie Shi, Menglan Duan, Zhongkun Ouyang","doi":"10.1016/j.bgtech.2024.100131","DOIUrl":"10.1016/j.bgtech.2024.100131","url":null,"abstract":"<div><div>MICP (Microbially induced calcite precipitation), an environmentally friendly soil improvement technique, has great potential in ocean engineering due to its ability to promote the precipitation of calcium carbonate through microbial activity to enhance the engineering properties of geomaterials. In this study, piezocone penetration test (CPTU) is used to evaluate the effectiveness of MICP treatment in calcareous sand. The change of physical properties (relative density <em>D</em><sub>r</sub> and total unit weight <em>γ</em><sub>t</sub>) of MICP treated calcareous sand is investigated by conducting CPTU on the geomaterials prepared in a series of mini calibration chambers (25 cm × 50 cm). Results indicate that CPTU (tip stress, sleeve friction, and porewater pressure) measurements can be used to interpret the physical characteristics of calcareous sand treated with MICP under seawater conditions. Additionally, a relationship between CPTU measurements, physical parameters (relative density <em>D</em><sub>r</sub> and total unit weight <em>γ</em><sub>t</sub>) of MICP treated calcareous sand is proposed and calibrated. The findings of the research extend the implementation of in-situ testing techniques such as CPTU towards physical property evaluation of bio-treated geomaterials in ocean environment, and demonstrate the potential of scaling up MICP techniques for broader engineering application.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 1","pages":"Article 100131"},"PeriodicalIF":0.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of sticky rice on the strength and permeability of bio-cemented sand 糯米对生物胶结砂强度和渗透性的影响

Biogeotechnics Pub Date : 2024-09-30 DOI: 10.1016/j.bgtech.2024.100141

Qiyong Zhang , Jian Chu , Zheng Zhang , Wenhao Wang , Shifan Wu

{"title":"Effect of sticky rice on the strength and permeability of bio-cemented sand","authors":"Qiyong Zhang , Jian Chu , Zheng Zhang , Wenhao Wang , Shifan Wu","doi":"10.1016/j.bgtech.2024.100141","DOIUrl":"10.1016/j.bgtech.2024.100141","url":null,"abstract":"<div><div>Microbially induced carbonate precipitation (MICP) is an eco-friendly soil improvement technique. However, this method still has some drawbacks, such as low conversion efficiency of CaCO<sub>3</sub> crystallization, insufficient strength for certain applications, and requiring multiple treatments. Previous studies have reported that sticky rice can regulate CaCO<sub>3</sub> crystals (i.e., chemical CaCO<sub>3</sub>) in the sticky rice-lime mortar, showing potential for improving the bio-cementation. Therefore, this study explored the possibility of using sticky rice to enhance the biocementation effect. Tests were carried out to assess the strength and permeability of bio-cemented sand with the inclusion of sticky rice. The results indicated that sticky rice may regulate the type and size of bio-CaCO<sub>3</sub> crystals, and the use of an appropriate amount of sticky rice as additive could increase the strength of sand columns by regulating CaCO<sub>3</sub> crystallization. Polyhedral calcites may be more favourable for the increasing strength than some vaterites with a hollow spherical structure. The combination of MICP and sticky rice can significantly decrease the coefficient of permeability to a value that was much lower than that by using sticky rice and MICP alone. Bio-CaCO<sub>3</sub> immobilized the sticky rice on one end on sand particles, and the reticulated structure of sticky rice divided large pores into small pores, which may be the important cause of the decrease in permeability coefficient. Finally, this study proposed that the MICP with the sticky rice as an additive may enhance the MICP effect and prevent the surface erosion of coarse-grained sand slopes.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 3","pages":"Article 100141"},"PeriodicalIF":0.0,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Miniaturized device to measure urease activity in the soil interstitial fluid using wenner method 利用温纳法测量土壤间隙液中尿素酶活性的微型装置

Biogeotechnics Pub Date : 2024-09-30 DOI: 10.1016/j.bgtech.2024.100120

Rafaela Cardoso , Thomas Drouinot , Susana Cardoso de Freitas

{"title":"Miniaturized device to measure urease activity in the soil interstitial fluid using wenner method","authors":"Rafaela Cardoso , Thomas Drouinot , Susana Cardoso de Freitas","doi":"10.1016/j.bgtech.2024.100120","DOIUrl":"10.1016/j.bgtech.2024.100120","url":null,"abstract":"<div><div>This paper presents a microdevice developed to measure the electrical conductivity of a liquid or a saturated porous medium using Wenner method. It is developed in the context of biocementation as soil improvement technique, which is used in Civil Engineering applications to produce calcium carbonate through bacterial or enzymatic activity, replacing the use of other binder materials such as cement or resins, and therefore reducing carbon footprint. The microdevice was used to measure urease activity in the soil interstitial fluid, to investigate if bacterial activity could be affected by the presence of the particles and tortuosity from pore geometry. Such analysis is important to understand biocementation mechanism inside the soil and helps to improve the design of such treatment solutions. The device is basically a squared reservoir printed in polypropylene using a 3D printing machine, incorporating stainless steel electrodes in its base. The electrical resistivity was computed adopting Wenner method, by connecting 4 PCB electrodes to a signal generator and an oscilloscope for measuring the voltage when a AC current of 1 mA was applied. Both square and sinusoidal waves with 5 kHz frequency were selected among other frequencies. The measurements were adjusted during the calibration of the microdevice, done using standard salt solutions with known electrical conductivity measured using an electrical conductivity probe. For the bacterial activity measurements, the bacterial and urea solutions were added to a uniform-graded size quarzitic sand (average diameter 0.3 mm) placed inside the microdevice and covering completely the electrodes. Bacterial activity was not affected by the presence of the sand, which confirms that this treatment is effective for this type of soils.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 1","pages":"Article 100120"},"PeriodicalIF":0.0,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal desorption remediation effects on soil biogeochemical properties and plant performance: Global meta-analysis 热解吸修复对土壤生物地球化学性质和植物性能的影响：全球荟萃分析

Biogeotechnics Pub Date : 2024-09-26 DOI: 10.1016/j.bgtech.2024.100140

Jiaxin Liao , Haowen Guo , Sanandam Bordoloi , Denian Li , Yuanxiang Zhang , Junjun Ni , Haoran Yuan , Xudong Zhao

{"title":"Thermal desorption remediation effects on soil biogeochemical properties and plant performance: Global meta-analysis","authors":"Jiaxin Liao , Haowen Guo , Sanandam Bordoloi , Denian Li , Yuanxiang Zhang , Junjun Ni , Haoran Yuan , Xudong Zhao","doi":"10.1016/j.bgtech.2024.100140","DOIUrl":"10.1016/j.bgtech.2024.100140","url":null,"abstract":"<div><div>Soil contamination remains a global problem, and numerous studies have been published for investigating soil remediation. Thermal desorption remediation (TDR) can significantly reduce the contaminants in the soil within a short time and consequently has been used worldwide. However, the soil properties respond to TDR differently and are dependent on the experimental set-up. The causative mechanisms of these differences are yet to be fully elucidated. A statistical meta-analysis was thus undertaken to evaluate the TDR treatment effects on soil properties and plant performance. This review pointed out that soil clay was reduced by 54.2%, while soil sand content was enhanced by 15.2% after TDR. This might be due to the release of cementing agents from clay minerals that resulted in the formation of soil aggregates. Soil electrical conductivity enhanced by 69.5% after TDR, which might be due to the heating-induced loss of structural hydroxyl groups and the consequent liberation of ions. The treatment of TDR leads to the reduction of plant germination rate, length, and biomass by 19.4%, 44.8%, and 20.2%, respectively, compared to that of control soil. This might be due to the residue of contaminants and the loss of soil fertility during the thermal process that inhibited plant germination and growth. Soil pH and sulfate content increased with heating temperature increased, while soil enzyme activities decreased with thermal temperature increased. Overall, the results suggested that TDR treatment has inhibited plant growth as well as ecological restoration.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 3","pages":"Article 100140"},"PeriodicalIF":0.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Climate impacts on deformation and instability of vegetated slopes 气候对植被边坡变形和失稳的影响

Biogeotechnics Pub Date : 2024-09-16 DOI: 10.1016/j.bgtech.2024.100139

Qi Zhang , Haiyi Zhong , Haowen Guo , Junjun Ni

引用次数: 0

Experimental investigation on response of biocemented coral sand pile composite foundation under seismic waves 地震波作用下生物胶凝珊瑚砂桩复合地基响应试验研究

Biogeotechnics Pub Date : 2024-09-07 DOI: 10.1016/j.bgtech.2024.100136

Xiangwei Fang , Chao Chen , Ganggang Zhou , Zhixiong Chen , Chunyan Wang , Luqi Wang

{"title":"Experimental investigation on response of biocemented coral sand pile composite foundation under seismic waves","authors":"Xiangwei Fang , Chao Chen , Ganggang Zhou , Zhixiong Chen , Chunyan Wang , Luqi Wang","doi":"10.1016/j.bgtech.2024.100136","DOIUrl":"10.1016/j.bgtech.2024.100136","url":null,"abstract":"<div><div>The biocemented coral sand pile composite foundation represents an innovative foundation improvement technology, utilizing Microbially Induced Carbonate Precipitation (MICP) to consolidate a specific volume of coral sand within the foundation into piles with defined strength, thereby enabling them to collaboratively bear external loads with the surrounding unconsolidated coral sand. In this study, a series of shaking table model tests were conducted to explore the dynamic response of the biocemented coral sand pile composite foundation under varying seismic wave types and peak accelerations. The surface macroscopic phenomena, excess pore water pressure ratio, acceleration response, and vertical settlement were measured and analysed in detail. Test results show that seismic wave types play a decisive role in the macroscopic surface phenomena and the response of the excess pore water pressure ratio. The cumulative settlement of the upper structure under the action of Taft waves was about 1.5 times that of El Centro waves and Kobe waves. The most pronounced liquefaction phenomena were recorded under the Taft wave, followed by the El Centro wave, and subsequently the Kobe wave. An observed positive correlation was established between the liquefaction phenomenon and the Aristotelian intensity of the seismic waves. However, variations in seismic wave types exerted minimal influence on the acceleration amplification factor of the coral sand foundation. Analysis of the acceleration amplification factor revealed a triphasic pattern—initially increasing, subsequently decreasing, and finally increasing again—as burial depth increased, in relation to the peak value of the input acceleration. This study confirms that the biocemented coral sand pile composite foundation can effectively enhance the liquefaction resistance of coral sand foundations.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 2","pages":"Article 100136"},"PeriodicalIF":0.0,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Architecture characterization of orchard trees for mechanical behavior investigations 果树机械行为研究的结构表征

Biogeotechnics Pub Date : 2024-08-31 DOI: 10.1016/j.bgtech.2024.100138

Min Kyung Jeon , Matthew Burrall , Tae Hyuk Kwon , Jason T. DeJong , Alejandro Martinez

{"title":"Architecture characterization of orchard trees for mechanical behavior investigations","authors":"Min Kyung Jeon , Matthew Burrall , Tae Hyuk Kwon , Jason T. DeJong , Alejandro Martinez","doi":"10.1016/j.bgtech.2024.100138","DOIUrl":"10.1016/j.bgtech.2024.100138","url":null,"abstract":"<div><div>Characterizing the architecture of tree root systems is essential to advance the development of root-inspired anchorage in engineered systems. This study explores the structural root architectures of orchard trees to understand the interplays between the mechanical behavior of roots and the root architecture. Full three-dimensional (3D) models of natural tree root systems, Lovell, Marianna, and Myrobalan, that were extracted from the ground by vertical pullout are reconstructed through photogrammetry and later skeletonized as nodes and root branch segments. Combined analyses of the full 3D models and skeletonized models enable a detailed examination of basic bulk properties and quantification of architectural parameters. While the root segments are divided into three categories, trunk root, main lateral root, and remaining roots, the patterns in branching and diameter distributions show significant differences between the trunk and main laterals versus the remaining lateral roots. In general, the branching angle decreases over the sequence of bifurcations. The main lateral roots near the trunk show significant spreading while the lateral roots near the ends grow roughly parallel to the parent root. For branch length, the roots bifurcate more frequently near the trunk and later they grow longer. Local thickness analysis confirms that the root diameter decays at a higher rate near the trunk than in the remaining lateral roots, while the total cross-sectional area across a bifurcation node remains mostly conserved. The histograms of branching angle, and branch length and thickness gradient can be described using lognormal and exponential distributions, respectively. This unique study presents data to characterize mechanically important structural roots, which may help link root architecture to the mechanical behaviors of root structures.</div></div>","PeriodicalId":100175,"journal":{"name":"Biogeotechnics","volume":"3 2","pages":"Article 100138"},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0