Advances in Bamboo Science最新文献_第4页

Investigation of the flexural capacity of glue-laminated Bambusa spinosa Roxb. beams using an experimental procedure and finite element analysis 胶合竹材抗弯性能的研究。采用梁的实验程序和有限元分析

Advances in Bamboo Science

Pub Date : 2025-07-04 DOI: 10.1016/j.bamboo.2025.100183

Sanjie Dutt A. Kumar , Franklyn F. Manggapis , Joe Robert Paul G. Lucena , Aaron Paul I. Carabbacan

We examined the flexural capacity of glue-laminated bamboo (GLB) beams made from Bambusa spinosa through experimental four-point bending tests and Finite Element Analysis (FEA) to evaluate mechanical performance, validate numerical models and develop moment capacity equations. We demonstrate that Bambusa spinosa meets structural requirements for engineered bamboo, with GLB100 and GLB125 achieving flexural strengths of 146.78 MPa and 130.66 MPa, respectively. An adhesive shear bond strength of 15.45 MPa ensured durability and structural integrity, while FEA predictions closely aligned with experimental results, confirming the accuracy of numerical modeling in structural analysis. This reinforces the viability of GLB beams as a sustainable alternative to traditional materials, contributing to reducing environmental impact in construction. Economic feasibility, building code limitations and standardization challenges are hindering widespread adoption, necessitating further research on optimizing lamination techniques, adhesive selection, and long-term durability under diverse environmental conditions. This will enhance the applicability of GLB beams in real-world structural designs. Our findings support the advancement of engineering standards for GLB beams, and promoting Bambusa spinosa as a high-strength, eco-friendly solution for sustainable construction.

通过试验四点弯曲试验和有限元分析（FEA），研究了由竹材制成的胶合竹材（GLB）梁的抗弯能力，以评估其力学性能，验证数值模型并建立弯矩能力方程。结果表明，竹材GLB100和GLB125的抗弯强度分别达到146.78 MPa和130.66 MPa，符合工程竹的结构要求。粘接剪切强度为15.45 MPa，保证了结构的耐久性和完整性，而有限元预测结果与实验结果吻合较好，证实了数值模拟在结构分析中的准确性。这加强了GLB梁作为传统材料的可持续替代品的可行性，有助于减少建筑对环境的影响。经济可行性、建筑规范限制和标准化挑战阻碍了广泛采用，因此需要进一步研究优化层压技术、粘合剂选择以及在不同环境条件下的长期耐久性。这将增强GLB梁在实际结构设计中的适用性。我们的研究结果支持了GLB梁工程标准的进步，并促进了竹木作为一种高强度、环保的可持续建筑解决方案。

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引用次数: 0

Influence of dry etching plasma treatment energy on the Young’s modulus and surface appearance of bamboo fibres 干刻蚀等离子体处理能量对竹纤维杨氏模量和表面形貌的影响

Advances in Bamboo Science

Pub Date : 2025-07-03 DOI: 10.1016/j.bamboo.2025.100180

S. Mosquera G , A. Mariño C , P. Luna T

We analyzed the effect of dry etching plasma treatment on the Young’s modulus and surface appearance of Guadua angustifolia fibres. The fibres were bombarded with argon ions at different energy levels and exposure times through a dry etching method. Scanning electron microscopy (SEM) analysis revealed that ion bombardment modified the fibre surface morphology, increasing roughness. Using higher plasma energy with shorter exposure times produced similar effects to those obtained with lower energy and longer exposure times. The increase in Young’s modulus was directly related to changes in the fibre’s surface structure. These findings confirm the influence of plasma treatment on the mechanical properties of the fibres and open new possibilities for their application as a reinforcement in composite materials.

分析了干刻蚀等离子体处理对番石榴纤维杨氏模量和表面形貌的影响。通过干蚀刻法，用不同能级和曝光时间的氩离子轰击纤维。扫描电镜（SEM）分析表明，离子轰击改变了纤维表面形貌，增加了粗糙度。使用较高的等离子体能量和较短的曝光时间与使用较低的能量和较长的曝光时间所获得的效果相似。杨氏模量的增加与纤维表面结构的变化直接相关。这些发现证实了等离子体处理对纤维机械性能的影响，并为其作为复合材料增强材料的应用开辟了新的可能性。

引用次数: 0

Potential barriers to bamboo-based carbon credit initiatives in Nepal: What stands in the way? 尼泊尔以竹子为基础的碳信用计划的潜在障碍是什么？

Advances in Bamboo Science

Pub Date : 2025-07-01 DOI: 10.1016/j.bamboo.2025.100179

Santosh Ayer

Bamboo, often referred to as “green gold”, has emerged as a promising nature-based solution for climate change mitigation due to its rapid growth rate and carbon sequestration capacity. With over 53 species across 12 genera distributed from the Terai lowlands to the Himalayan foothills, Nepal holds substantial potential to engage in bamboo-based carbon credit mechanisms. To support this potential, I conducted a narrative review focused on Nepal-specific literature, complemented by global sources to contextualize broader methodological and policy gaps that constrain bamboo’s integration into carbon markets. Globally, bamboo remains underrepresented in carbon certification frameworks due to the absence of recognized methodologies, standardized measurement, reporting, and verification (MRV) protocols, and its classification as a non-timber forest product. These global limitations pose additional barriers for countries like Nepal, where bamboo is largely cultivated outside traditional forest areas. In addition, key challenges for Nepal include: (1) inadequate bamboo species documentation and distribution mapping, (2) lack of structured silvicultural management practices, (3) absence of species-specific allometric models for biomass estimation, and (4) policy and institutional gaps that exclude bamboo ecosystems—particularly those outside forests—from REDD+ and national carbon frameworks. Financial and market-related constraints, such as high project registration costs, volatile carbon pricing, and limited access to certification mechanisms, further hinder participation. While existing studies highlight bamboo’s carbon sink potential, more accurate species-level data, spatial inventories, and carbon accounting tools are required to support reliable stock estimation. Based on my findings, I recommend that Nepal should revise its national forest definition to include bamboo, develop bamboo-specific MRV protocols, clarify carbon rights, and introduce targeted financial incentives to facilitate bamboo’s inclusion in both compliance and voluntary carbon markets.

竹子通常被称为“绿色黄金”，由于其快速的生长速度和碳固存能力，它已成为一种有希望的基于自然的缓解气候变化的解决方案。尼泊尔拥有12属53种以上的物种，分布在特莱低地到喜马拉雅山麓，具有参与以竹子为基础的碳信用机制的巨大潜力。为了支持这一潜力，我进行了一项以尼泊尔特定文献为重点的叙述性回顾，并辅以全球资源，将限制竹子融入碳市场的更广泛的方法和政策差距置于背景下。在全球范围内，由于缺乏公认的方法、标准化测量、报告和验证（MRV）协议，以及竹子被归类为非木材林产品，竹子在碳认证框架中的代表性仍然不足。这些全球性的限制给尼泊尔这样的国家带来了额外的障碍，在这些国家，竹子主要种植在传统森林地区之外。此外，尼泊尔面临的主要挑战包括：(1)竹子物种记录和分布图不足，(2)缺乏结构化的造林管理实践，(3)缺乏用于生物量估算的物种特异性异速生长模型，以及(4)政策和制度上的差距，将竹生态系统（特别是森林外的生态系统）排除在REDD+ 和国家碳框架之外。高昂的项目注册成本、不稳定的碳定价以及有限的认证机制等与资金和市场相关的制约因素进一步阻碍了参与。虽然现有研究强调了竹子的碳汇潜力，但需要更准确的物种水平数据、空间清单和碳核算工具来支持可靠的储量估算。根据我的研究结果，我建议尼泊尔修改其国家森林定义，将竹子纳入其中，制定针对竹子的MRV协议，明确碳权，并引入有针对性的财政激励措施，以促进将竹子纳入合规和自愿碳市场。

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引用次数: 0

Towards green composites: Composites reinforced with bamboo fibre mats 迈向绿色复合材料：用竹纤维垫增强复合材料

Advances in Bamboo Science

Pub Date : 2025-07-01 DOI: 10.1016/j.bamboo.2025.100181

R. Udhayasankar, R. Sathish Kumar

The need to protect the environment has led to the development of eco-friendly materials. In this context, green composites have been created using bamboo fibre mat (BF) as the primary reinforcement, polylactic acid (PLA) as the matrix, and nano silica as a filler material. Bamboo fibre is significant because it is renewable, biodegradable and widely available, making it an excellent alternative to synthetic materials. In this study, six composite samples were fabricated by varying the weight percentages of PLA, bamboo fibre mat and nano silica. We evaluated the properties of these fabricated composites. Experimental observations revealed that Sample S4 exhibited the best mechanical properties, including the highest tensile strength and stiffness, as well as improved water absorption and thermal stability compared to the other samples. Sample S6 (50 % PLA, 25 % bamboo fibre, 25 % nano silica) had a lower density due to the presence of more voids. Scanning electron microscopy images of Sample S4 (70 % PLA, 15 % bamboo fibre, 15 % nano silica) showed a uniform distribution of nano silica fillers throughout the PLA matrix. Additionally, Sample S5 (60 % PLA, 20 % bamboo fibre, 20 % nano silica)) demonstrated good interaction between nano silica, PLA and the natural fibres, which facilitated better material integration. Our results suggest that these biocomposites could serve as effective and sustainable materials for various applications.

保护环境的需要导致了环保材料的发展。在这种情况下，绿色复合材料已经被创造出来，使用竹纤维垫（BF）作为主要增强材料，聚乳酸（PLA）作为基体，纳米二氧化硅作为填充材料。竹纤维是重要的，因为它是可再生的，可生物降解的，广泛使用，使其成为合成材料的极好替代品。在本研究中，通过改变PLA、竹纤维垫和纳米二氧化硅的重量百分比，制备了6种复合材料样品。我们评估了这些复合材料的性能。实验结果表明，与其他样品相比，S4样品具有最佳的力学性能，包括最高的拉伸强度和刚度，以及更好的吸水性和热稳定性。样品S6（50 % PLA， 25 %竹纤维，25 %纳米二氧化硅）由于存在更多的空隙而具有较低的密度。样品S4（70 % PLA， 15 %竹纤维，15 %纳米二氧化硅）的扫描电镜图像显示纳米二氧化硅填料在PLA基体中均匀分布。此外，样品S5（60 % PLA， 20 %竹纤维，20 %纳米二氧化硅）表明，纳米二氧化硅，PLA和天然纤维之间具有良好的相互作用，有利于更好的材料集成。我们的研究结果表明，这些生物复合材料可以作为有效和可持续的材料用于各种应用。

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引用次数: 0

Nutritional evaluation of bamboo leaf-based pellets for livestock in northeastern India 印度东北部家畜用竹叶基颗粒的营养评价

Advances in Bamboo Science

Pub Date : 2025-06-25 DOI: 10.1016/j.bamboo.2025.100178

S. Krishnamoorthi , M.P. Divya , R. Ravi , V. George Jenner , M. Raveendran , P. Hemalatha

The demand for green and dry fodder is projected to reach 1012 million tonnes and 631 million tonnes, respectively, by 2050. In this context, bamboos are a promising alternative for addressing the growing demand for both green and dry fodder due to consistent biomass production throughout the year, making it a valuable resource. Bamboo is abundant in northeastern India, particularly in Tripura, and offers a possible renewable fodder resource for livestock. This study explores the potential of bamboo species (Melocanna baccifera, Bambusa vulgaris and Bambusa polymorpha) for producing high quality, nutrient rich, leaf-based pellets produced using a portable pelleting machine.The results showed that a composite containing Melocanna baccifera with groundnut oil cake (15 %), rice bran (4 %), maize grain (4 %), finger millet grains (4 %), molasses (1 %), mineral mixture (1 %) and salt (1 %) exhibited better quality, based on nutritional, anti-nutritional and palatability in terms of maximum crude protein (19.86 %) and carbohydrates (40.10 %). The minimum moisture content (8.00 %), ash content (8.88 %), crude fat (3.34 %), crude fibre (21.90 %), total nitrates (0.022 %), total phenols (0.73 %), total tannin (0.17 %) and total silica (1.80 %) were all considered to be good. We suggest that bamboo leaf-based pellets are a promising alternative to conventional fodder, offering a sustainable and nutritionally superior option to support India's growing livestock sector.

预计到2050年，对绿色饲料和干饲料的需求将分别达到10.12亿吨和6.31亿吨。在这种情况下，竹子是解决对绿色和干饲料日益增长的需求的一种有希望的替代方案，因为竹子全年持续生产生物质，使其成为一种宝贵的资源。在印度东北部，特别是特里普拉邦，竹子非常丰富，为牲畜提供了一种可能的可再生饲料资源。本研究探讨了竹品种（Melocanna baccifera， Bambusa vulgaris和Bambusa polymorpha）利用便携式造粒机生产高品质，营养丰富的叶基颗粒的潜力。结果表明,复合含Melocanna baccifera花生油蛋糕(15 %),米糠(4 %),玉米谷物(4 %),手指小米谷物(4 %)、糖浆(1 %),矿物混合物(1 %)和盐(1 %)表现出更好的质量,基于营养,anti-nutritional和适口性的最大粗蛋白(19.86 %)和碳水化合物(40.10 %)。最低水分（8.00 %）、灰分（8.88 %）、粗脂肪（3.34 %）、粗纤维（21.90 %）、总硝酸盐（0.022 %）、总酚（0.73 %）、总单宁（0.17 %）和总二氧化硅（1.80 %）均被认为是好的。我们认为以竹叶为基础的颗粒是传统饲料的一种有前途的替代品，为印度不断增长的畜牧业提供了可持续和营养优越的选择。

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引用次数: 0

Preparation and characterization of fluff from bamboo as source of fibre for the production of hygiene products 卫生用品纤维原料竹绒毛的制备及性能研究

Advances in Bamboo Science

Pub Date : 2025-06-20 DOI: 10.1016/j.bamboo.2025.100176

Gunjan Dhiman, Arvind Sharma, Deepak Sharma, Priti S. Lal

This work explores the utilization of the bamboo Dendrocalamus strictus in place of softwood for the production of fluff. Unbleached kraft bamboo pulp was prepared using Kraft pulping. Pulping was done by applying 19 % chemical charge (as Na₂O) to get the desired kappa number (14.5) of unbleached pulp. The unbleached bamboo pulp was bleached through ECF (Elemental Chlorine Free) and TCF (Total Chlorine Free) bleaching sequences to assess the impact of bleaching chemicals on fluff properties. A Sprout Waldron lab disc refiner was used to hammer the bleached bamboo pulp into fluff. FE-SEM images clearly showed the difference in fibre morphology before and after hammering. The bamboo fluff was analyzed for various parameters and compared to softwood fluff. The results established the suitability of bamboo as a source of fibre for the production of fluff. Morphological characteristics of bamboo and softwood before and after refining were compared to check the impact on fibre properties. After hammering, the pulp fibre was shortened. ECF bleached pulp demanded more energy than TCF bleached pulp during hammering. The physical strength properties of both bamboo ECF fluff and bamboo TCF fluff pads were also determined and compared with softwood fluff.

本研究探讨了利用竹材竹竹代替软木生产绒毛。采用硫酸盐浆法制备了未漂白硫酸盐竹浆。用19% %的化学负荷量（如Na2O）制浆，得到未漂白纸浆所需的kappa值（14.5）。采用ECF （Elemental cl Free）和TCF （Total cl Free）两种漂白剂对未漂白竹浆进行漂白，考察漂白剂对竹浆绒毛性能的影响。采用斯普劳特-沃尔德伦实验室盘式精炼机对漂白后的竹浆进行锤炼成绒毛。FE-SEM图像清晰地显示了锤击前后纤维形态的差异。对竹材绒毛的各项参数进行了分析，并与软木绒毛进行了比较。研究结果表明，竹是生产绒毛的适宜原料。比较了竹材和软木精炼前后的形态特征，考察了其对纤维性能的影响。锤击后，纸浆纤维缩短。在锤击过程中，ECF漂白纸浆比TCF漂白纸浆需要更多的能量。测定了竹材ECF绒毛和竹材TCF绒毛垫的物理强度，并与软木绒毛进行了对比。

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引用次数: 0

Bioenergy potential of Kauayan tinik (Bambusa spinosa Roxb.) and Kauayan kiling (Bambusa vulgaris Schrad. ex J.C.Wendl): Culm height section analysis Kauayan tinik （Bambusa spinosa Roxb.）和Kauayan kiling （Bambusa vulgaris Schrad.）的生物能源潜力。例j.c.m endl): Culm高度剖面分析

Advances in Bamboo Science

Pub Date : 2025-06-17 DOI: 10.1016/j.bamboo.2025.100177

Celine Rose S. Jimenez, Anniver Ryan P. Lapuz, Amando Allan D.M. Bondad, Cheyenne R. Marqueses, Ma. Cecile B. Zamora

This study evaluated the energy potential of two Philippine bamboo species, Bambusa spinosa (known locally as Kauayan tinik) and Bambusa vulgaris (known as Kauayan kiling), by analyzing moisture content, relative density, proximate composition, ash basic oxide composition, gross calorific value and energy density across different culm height sections (bottom, middle and top). Moisture content significantly decreased from bottom to top, while relative density showed the opposite trend, with a strong negative correlation observed, particularly in B. spinosa. Proximate analysis revealed that the bottom and middle sections of both bamboo species had higher volatile matter and fixed carbon, along with lower ash content. In both bamboo species, the ash contained more CaO than MnO and Fe₂O₃, while the top section of the culm had the lowest levels of all identified basic oxide components. This top section also exhibited the highest energy density, suggesting greater potential suitability for biomass energy generation.

本研究通过分析不同竿高段（底部、中部和顶部）的水分含量、相对密度、近似组成、灰分碱性氧化物组成、总热值和能量密度，评估了两种菲律宾竹种竹（Bambusa spinosa）和竹（Bambusa vulgaris）的能量潜力。水分含量自上而下呈显著下降趋势，而相对密度呈相反趋势，且呈较强的负相关，尤以棘叶刺槐最为显著。近似分析表明，两种竹材底部和中部的挥发物和固定碳含量较高，灰分含量较低。两种竹的灰分中CaO含量均高于MnO和Fe2O3，而茎顶部分的碱性氧化物含量最低。顶部部分也显示出最高的能量密度，表明更适合生物质能发电。

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引用次数: 0

Nursery level bamboo plant species classification using Deep Learning 苗圃级竹子植物物种分类的深度学习方法

Advances in Bamboo Science

Pub Date : 2025-06-15 DOI: 10.1016/j.bamboo.2025.100175

Pranjali Prashant Joshi , Anant M. Bagade

Bamboos are of considerable value in farming and are considered as a multi-utility “Green Gold” resource. They also play a crucial role in supporting human life due to their environmental significance. Several bamboo species are difficult to classify manually using traditional methods. Due to the subtle differences in anatomy, their visual identification requires much field experience and expertise. This raises challenges for visual identification and suggests that the use of modern technologies could help with their identification. Accurate identification would assist in choosing the appropriate species for cultivation and would help ensure the appropriate species for various end-use applications. In this study, deep learning (DL) and machine learning (ML) were used for the automated identification of bamboos growing in nurseries. We created a bamboo image dataset comprising of 800 plant images and 4000 augmented images. These were categorized into four distinct species. We used transfer learning methods with and without image augmentation. The results revealed that DenseNet121, VGG16, VGG19 and MobileNetV2 could identify plants with an accuracy of 80.83 %, 82.92 %, 84.17 % and 76.67 %, respectively, without augmentation and with 83.37 %, 95.87 %, 96.37 % and 88.12 % accuracy, respectively, with augmentation. We introduced a Classifusion approach to classification which resulted in an accuracy rate of 97.37 % for augmented images. The results of this work should help farmers and novice users to identify species automatically at the nursery stage.

竹子在农业中具有相当大的价值，被认为是一种多用途的“绿色黄金”资源。由于它们的环境意义，它们在支持人类生活方面也起着至关重要的作用。一些竹种很难用传统方法进行人工分类。由于解剖结构的细微差异，它们的视觉识别需要大量的现场经验和专业知识。这对视觉识别提出了挑战，并表明使用现代技术可以帮助识别它们。准确的鉴定将有助于选择适当的种植品种，并有助于确保为各种最终用途提供适当的品种。本研究将深度学习（DL）和机器学习（ML）技术应用于苗圃竹材的自动识别。我们创建了一个由800个植物图像和4000个增强图像组成的竹图像数据集。它们被分为四个不同的种类。我们使用了带和不带图像增强的迁移学习方法。结果表明，DenseNet121、VGG16、VGG19和MobileNetV2在不增强的情况下，对植物的识别准确率分别为80.83 %、82.92 %、84.17 %和76.67 %；增强的情况下，识别准确率分别为83.37 %、95.87 %、96.37 %和88.12 %。我们引入了一种分类融合方法对增强图像进行分类，准确率达到97.37 %。这项工作的结果应该有助于农民和新手用户在苗圃阶段自动识别物种。

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引用次数: 0

Harnessing the potentials of bamboo as a sustainable feedstock for bioenergy production 利用竹子作为生物能源生产可持续原料的潜力

Advances in Bamboo Science

Pub Date : 2025-06-04 DOI: 10.1016/j.bamboo.2025.100173

Omojola Awogbemi , Dawood A. Desai

The rising global population, dwindling fossil-based energy reserves and grave environmental concerns have made the search for affordable, renewable and sustainable energy sources more compelling. Bioenergy has become one of the viable alternatives for fossil-based energy sources and a prominent part of the global energy mix. We review the application of bamboo as a feedstock for the generation of various forms of bioenergy. We give an overview of the global market size, cultivation, harvesting, pretreatment techniques, properties and characterization of bamboo as a promising lignocellulosic biomass for bioenergy production. The processes for the conversion of bamboo into pellets, briquettes, biochar, bioethanol, biooil, biobutanol, syngas, biogas and biomethane are highlighted. The deployment of bamboo as feedstock for bioenergy generation is cost-effective, sustainable, ensures high conversion efficiency and generates high bioenergy yield and quality. The limitations of deforestation, land allocation, water use concerns, scalability, lack of biomass bioenergy market and inconsistent policies can be solved through the institution and funding of more novel research and the enactment of appropriate policies and regulations. Further studies into the optimization of bamboo species, process parameters, reactor configurations, development of integrated pretreatment techniques, genetic modification of bamboo, life cycle and environmental impact assessments, and sustainability will advance bamboo bioenergy research. More innovative research and development, development of academia and industry players’ cooperation, enactment and implementation of ethical, legal, and regulatory frameworks, and incentivizing the bamboo bioenergy market are recommended to ameliorate the identified challenges limiting the development of bamboo bioenergy.

全球人口的增长、化石能源储量的减少以及严重的环境问题，使得寻找负担得起的、可再生的和可持续的能源变得更加迫切。生物能源已成为化石能源的可行替代品之一，是全球能源结构的重要组成部分。本文综述了竹子作为原料在各种生物能源生产中的应用。我们概述了全球市场规模，种植，收获，预处理技术，竹子作为一种有前途的木质纤维素生物质用于生物能源生产的特性和特征。重点介绍了将竹子转化为颗粒、压块、生物炭、生物乙醇、生物油、生物丁醇、合成气、沼气和生物甲烷的过程。利用竹子作为生物能源生产的原料具有成本效益，可持续性，确保高转换效率，并产生高生物能源产量和质量。砍伐森林、土地分配、用水问题、可扩展性、缺乏生物质生物能源市场和政策不一致的限制可以通过组织和资助更新颖的研究以及制定适当的政策和条例来解决。竹材品种优化、工艺参数优化、反应器配置优化、综合预处理技术开发、竹材基因改造、竹材生命周期和环境影响评价、竹材可持续性等方面的深入研究将推动竹材生物能源研究的发展。建议加强创新研究和开发，发展学术界和行业参与者的合作，制定和实施伦理、法律和监管框架，并激励竹生物能源市场，以改善限制竹生物能源发展的已知挑战。

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引用次数: 0

Physical and mechanical properties of highland bamboo (Oldeania alpina (K.Schum.) Stapleton) landraces and culm sections growing at Banja District, Northwest Ethiopia 高原竹（Oldeania alpina）的物理力学特性在埃塞俄比亚西北部巴尼亚地区生长的斯台普顿（Stapleton）长白草和秆类植物

Advances in Bamboo Science

Pub Date : 2025-05-31 DOI: 10.1016/j.bamboo.2025.100172

Zemenu Bantie , Abera Getahun Tegegne , Yohannis Gebremariam

Bamboo is the most versatile plant on the earth and is an important alternative construction material. Ethiopia has two native bamboo species (Oxytenanthera abyssinica and Oldeania alpina). O. alpina is the most important and widely distributed species. The landraces of this species are characterised by differing morphological and mechanical characteristics. Three O. alpina landraces in Banja district, Ethiopia, were used to investigate the effects of landraces and culm sections on the physical and mechanical properties of the culms. Nine culms from each of the three landraces were harvested to examine their physical and mechanical properties. Harvested culms were divided into three sections along the culm length, i.e., bottom, middle and top. Data were analysed with factorial two-way ANOVA and correlation tests. We conducted Tukey's honestly significant difference (HSD) test for parameters that were significant. We found an interaction effect of landraces and culm sections on moisture content and oven dry density. Culm density was highest in the top section the red landrace, followed by the top section of the black landrace, the middle section of the red landrace, the top section of the striped landrace, the middle section of the striped landrace, the bottom section of the striped landrace, the bottom section of the red landrace, the middle section of the black landrace and finally the bottom section of the black landrace. There was a significant difference in tangential and radial shrinkage between landraces and culm sections. There was also a significant interaction effect of compression strength between landraces and culm sections. The top section of the red landrace, the top section of the black landrace and the middle section of the red landrace had the highest to lowest compression strength, respectively. The effect of landrace and culm section on modulus of elasticity and modulus of rupture were significantly different. The strength of the bamboo culms was strongly correlated with their moisture contents. Moisture content was negatively correlated with compression energy, modulus of rupture and modulus of elasticity. We recommend that producers develop bamboo-based products based on their physical and mechanical properties to meet product standards.

竹子是地球上用途最广的植物，是一种重要的替代建筑材料。埃塞俄比亚有两种本地竹子（Oxytenanthera abyssinica和Oldeania alpina）。O. alpina是最重要且分布最广的一种。这个物种的地方品种具有不同的形态和机械特征。本文利用埃塞俄比亚巴尼亚地区的3个O. alpina地方品种，研究了地方品种和茎秆段对茎秆物理力学性能的影响。从三个地方品种中各收获九根茎，以检查其物理和机械特性。收获的茎秆沿茎秆长度分成三段，即底部、中部和顶部。数据分析采用因子双因素方差分析和相关检验。对有显著性的参数进行Tukey诚实显著性差异（HSD）检验。我们发现地方品种和茎段对含水量和烘箱干密度有交互作用。茎秆密度以红色地方品种顶部最高，其次为黑色地方品种顶部、红色地方品种中部、条纹地方品种顶部、条纹地方品种中部、条纹地方品种底部、红色地方品种底部、黑色地方品种中部和黑色地方品种底部。地方品种和茎段在切向和径向收缩方面存在显著差异。地方品种与茎段抗压强度的互作效应也显著。红白、黑白和红白的顶部、中部的抗压强度分别最高到最低。长、秆断面对弹性模量和断裂模量的影响有显著差异。竹竿的强度与其水分含量密切相关。含水率与压缩能、断裂模量和弹性模量呈负相关。我们建议生产商根据其物理和机械性能开发以竹子为基础的产品，以满足产品标准。

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引用次数: 0