Advances in Bamboo Science最新文献

Leaf biomass is a crucial parameter that influences forest growth and carbon exchange between ecosystems and the atmosphere. A clear understanding of the vertical distribution of leaf biomass is essential for accurate carbon sequestration estimations in Moso bamboo. We collected data on leaf biomass from each crown layer and the structural characteristics of 54 individual Moso bamboo plants. We then simulated the vertical distribution of normalized upward cumulative leaf biomass (CLBn) using three power functions. The first model (Model 1) estimates CLBn using unique and unadjustable parameters (a and b) of the power function. In the second model (Model 2), parameter ‘a’ was fixed at 1, and parameter ‘b’ was fitted for all samples. In the third model (Model 3), parameter b was adjusted based on the structural characteristics of each bamboo. Model 3 demonstrated the highest accuracy in estimating CLBn and normalized leaf biomass (LBn) in each layer, with RMSEr values of 20.34 % and 36.85 % for CLBn and LBn, respectively. When compared with Model 1 and Model 2, Model 3 reduced RMSEr by 12.27 % and 6.88 % for CLBn and 21.13 % and 10.49 % for LBn, respectively. However, uncertainty remained significant in low LBn estimates from Model 3. Variations in the vertical distribution of CLBn in individual bamboo plants were primarily explained by crown length, height to the lowest living branch, and age. This study proposes a viable method for elucidating the variation in CLBn among individual bamboo plants.

With respect to carbon neutrality, bamboo-based materials have attracted extensive attention in architectural design. However, the existing reviews typically focus on materials and structural components, and do not reach the level of architectural design. The aim of this review is to provide reasonable recommendations in response to these limitations with the following specific objectives: (1) identifying the research trends in bamboo architecture via a systematic review process and providing a mapping of the knowledge domains in this area; (2) summarizing the design strategies regarding bamboo architecture through a literature review, expert interviews, and field investigations using a meta-analysis method; and (3) identifying existing research directions and gaps for the recommendation of the future directions for bamboo architecture design. Through systematic synthesis and data visualization, this review contributes to the area of bamboo architecture design in terms of both scientific research trends and practical design strategies. More importantly, this work reviews not only articles but also typical case studies via expert interviews and field investigations. Finally, future directions for bamboo architecture design, including sustainability, cost, and comfort, are provided to achieve the research goals.

This work was undertaken to examine the compatibility of bamboo particles and their bonding with Portland cement for bamboo-reinforced cement-bonded particle board. Pozzolana Portland cement was used as a sizing agent. The amount of bamboo particles was taken on an air-dry basis of cement. Sodium silicate (Na₂SiO₃) and aluminium sulphate [Al₂(So₄)₃] were used to prevent the heat of hydration and increase the rate of cement setting, respectively. Different ratios of cement and bamboo particles were used to study the properties of the particle board. The physical and mechanical properties of Bambusa bambos bamboo reinforced cement bonded particle boards were evaluated. The density of the boards varied between 1.28 g/cm³ to 1.36 g/cm³ in 2.0:1.0 and 3.0:1.0 cement: particle ratios, respectively. The moisture content of the boards was 9.96 %, 6.98 % and 6.62 % for 2.0:1.0, 2.5:1.0 and 3.0:1.0 ratios of cement: particle, respectively. The physical properties of the board, such as density, moisture content, water absorption and thickness swelling decreased with an increase in the cement: bamboo particle ratio. The maximum MOR and MOE were 9.17 N/mm² and 4884 N/mm², respectively in 3.0:1.0 cement: bamboo particle ratios. The mechanical properties of the boards such as tensile strength, modulus of rupture (MOR), modulus of elasticity (MOE) and screw withdrawal were increased with an increase in the cement: bamboo particle ratios. The 2.5:1.0 and 3.0:1.0 cement: bamboo particle ratios performed best for cement-bonded particle boards and also passed the IS: 14276 standard. These cement-bonded particle boards can be used for partitioning, wall cladding, flooring, false sealing, kitchen cabinets and other purposes.

This study investigates the development of eco-composite panels using treated and untreated nonwoven polypropylene (PP) extracted from disposable medical face masks, reinforced with bamboo particles. Treated PP underwent a washing process with detergent. Panels were fabricated with varying PP-to-bamboo particle ratios of 100:0, 75:25, and 50:50. Fourier-transform infrared (FT-IR) spectroscopy analysis indicated minimal impact of washing on the intrinsic properties of the PP material, as confirmed by thermogravimetric analysis (TGA). Both analyses showed similar intensities of functional groups and thermal trends in treated and untreated recycled PP (rPP) samples. Energy-dispersive X-ray spectroscopy (EDX) confirmed the uniform integration of bamboo particles within the PP matrix by detecting silicon and potassium elements. Chemical interactions between bamboo fibres and the PP matrix were also evident in the form of reduced peak intensities in FT-IR spectra. Despite these interactions, limited adhesion between bamboo fibres and the PP matrix led to reduced stability and mechanical strength in the eco-composite panels. A direct correlation was observed between board thickness and the proportion of bamboo particles, with the 50:50 formulation showing the greatest thickness. Conversely, board strength decreased as bamboo particle concentration increased due to weak interfacial adhesion. Notably, panels made from treated rPP exhibited superior mechanical properties compared to those from untreated rPP, achieving a modulus of rupture (MOR) of 36.259 MPa and a modulus of elasticity (MOE) of 2048.215 MPa. These findings underscore the potential of utilizing nonwoven PP from disposable medical face masks, reinforced with bamboo fibre particles, to create eco-composite materials with enhanced sustainability and mechanical properties.

Landslide mitigation is one of the major challenges occurring in hilly and mountainous regions worldwide. Various civil construction-based options, such as constructing walls and making fences using wires and metallic mesh, are regularly employed in attempts to reduce the hazard, but these measures are temporary solutions to stop the movement of unstable soil. The problem of unstable soils could be solved by increasing the vegetation on the hilltops and mountains where soil erosion and mass movements are predominant. A bioengineering approach could resolve this problem in a sustainable way and without damaging the environment. Various methods and approaches have been adopted worldwide for landslide mitigation and are discussed and critically analyzed in this article. The effectiveness of bamboo plantations on the hilltops and the use of specific species as determined by the soil characteristics are discussed and elaborated. Some research gaps in the existing bioengineering aspects and scope of research are highlighted for further improvement and refinement.

This study compared the effectiveness of crude lake salt, a traditional preservative used by artisans in Uganda, and borax-boric acid, a conventional preservative, against fungal degradation. Using the European standard, an experiment was set up to determine the durability of Oxytenanthera abyssinica, Oldeania alpina and Bambusa vulgaris treated with 2 % and 6 % crude lake salt and borax-boric acid against Gloeophyllum trabeum, Coniophora puteana and Trametes versicolor. Mass loss comparisons between treated and untreated bamboo samples were made. Durability classes were assigned according to the amount of mass lost. Bamboo samples exposed to G. trabeum had lower surface hyphal coverage compared to those exposed to C. puteana and T. versicolor irrespective of the preservative used. Samples treated with borax-boric acid were in durability class I compared to those treated with crude lake salt that were between class II and III according to European standard. The lowest mass loss for bamboo treated with crude lake salt was 5.9 % in O. abyssinica exposed to G. trabeum. The highest mass loss for bamboo treated with crude lake salt was 14.24 % in B. vulgaris exposed to T. Versicolor. The study confirmed that while artisans use crude lake salt as a traditional preservative, it does not protect against white and brown rot while all concentrations of borax-boric acid provided protection against all fungi.

Moso bamboo is an essential forest resource in China, covering the largest area and stock of any bamboo species. Four provinces (Fujian, Hunan, Zhejiang, Jiangxi) each have more than 70 million hectares, collectively accounting for 80 % of the total area of Moso bamboo in China. We named these four provinces as the core area for Moso bamboo and the remaining area in other provinces as non-core area. There has been limited research on how climate, topography, and soil factors collectively affect Moso bamboo biomass in both the core and non-core areas. To better understand the variations, data on DBH and individual biomass were gathered from 348 plots from 25 literature sources and a total of 18 plots from four field surveys conducted in 2019. We found evidence that the above-ground biomass of Moso bamboo forests is influenced by a combination of climate, soil nutrients and topography, with different factors playing a more significant role in the core and non-core areas. Moso bamboo had higher individual above-ground biomass in the core area compared to the non-core area. In the core area, above-ground biomass of Moso bamboo was more influenced by climate than by soil nutrients. In this area, annual minimum temperature had a negative effect on above-ground biomass, while precipitation had a positive effect. In contrast, soil total nitrogen had the largest positive effect on above-ground biomass in non-core area. These findings may contribute to the development of a future biomass model for Moso bamboo forests.

Noodles, a ubiquitous and convenient dietary choice for millions, have become an integral part of the contemporary diet. As dietary preferences evolve and nutritional deficiencies persist, the necessity of fortifying noodles with essential nutrients has gained prominence. In the present study, the nutritional content of noodles fortified with a fiber rich powder of freeze-dried and oven-dried bamboo shoots was compared to the control. The noodles fortified with the powder had a maximum content of amino acid (1.15 g/100 g), proteins (7.14 g/100 g), carbohydrates (40.4 g/100 g), starch (71.1 g/100 g). Vitamin C and E contents of the fortified noodles were enhanced compared to control noodles, with fortified noodles containing a maximum vitamin C content of 2.91 mg/100 g and a maximum vitamin E content of 0.79 mg/100 g. The content of fat in the fortified noodles was lower than the control noodles (2.71 g/100 g), which will be beneficial for health conscious consumers. The antioxidant activity was highest in the fortified noodles (1420.6 µg/ml, IC₅₀ of DPPH), and the minimum antioxidant activity was observed in control noodles (IC₅₀ value of 2431.17 μg/ml). The sensory score for fortified noodles was greater for texture (7.5), taste (7.7), and overall acceptability (7.2) compared to the control noodles (7.4, 7.6, and 7.0 respectively). Fortifying noodles with essential nutrients is a promising way to improve the nutritional value of this popular food item. Bamboo shoots, being rich in micro- and macro-nutrients, could play a key role in improving the nutritional and health-enhancing properties of fortified products.

Dendrocalamus asper (giant bamboo) is a clumping type of bamboo belonging to the Poaceae family. Due to its economic and environmental value, demand for this species has increased tremendously. Conventional propagation methods have limitations due to low seed viability and the lack of healthy clumps. Therefore, an in vitro mass propagation protocol was developed to provide healthy plants for large-scale plantations. Seeds were used as the explant and they were surface sterilized and cultured on MS medium free of growth regulators. Nodal segments taken from in vitro germinated seedlings were used for shoot initiation. The best medium for shoot induction (MS medium supplemented with 0.0–2.5 mg/L BAP), best medium for multiple shoot induction (MS medium supplemented with 0.0–5.0 mg/L BAP), effect of shoot cluster size (shoot clusters containing 1–4 shoots) and effect of physical state of the medium (semisolid and liquid media) on multiple shoot induction were determined using shoots per node, mean shoot length and mean number of leaves per shoot after 6 weeks of incubation. Elongated shoots were transferred into a rooting medium and the best medium for root induction (MS medium supplemented with 0.0–5.0 mg/L IBA and IAA) and effect of cluster size (shoot clusters containing 1–4 shoots) on rooting were determined using the number of roots and root length after 6 weeks of incubation. All the cultures were maintained under a 16-hour photoperiod. Well-developed plantlets were transferred to coir pellets and after four weeks transferred into different potting mixtures containing different combinations of sand, compost and coir dust. Unless otherwise mentioned there were at least twenty replicates in all treatments. The highest mean number of shoots per node (16.87±0.52), mean shoot length (4.12±0.27 cm) and mean number of leaves per shoot (4.80±0.33) were observed in the MS medium supplemented with 1.0 mg/L BAP. The MS medium supplemented with 2.0 mg/L BAP was the best for multiple shoot induction, shoot cluster with 3 shoots was the best cluster size and the liquid medium had a better effect on shoot multiplication. The half-strength MS medium supplemented with 2.0 mg/L IBA was the best for in vitro root induction with the highest mean number of roots (7.15±0.77) and a mean root length of 10.79±1.11 cm. Shoot clusters with 3 shoots was the best cluster size for root induction. A sand: compost: coir dust (1:1:1) mixture was the best potting mixture giving 100% survival. These findings provide a reliable micropropagation protocol for D. asper, which holds great promise for meeting the growing demand for bamboo resources and promoting sustainable bamboo cultivation.

This review paper provides insights into bamboo fibre, covering its extraction methods, properties and various applications. The initial focus is on the different techniques used to extract bamboo fibre, including mechanical and chemical processes, with an exploration of the advantages and challenges associated with each method. The paper then highlights the unique properties of bamboo fibres, such as their strength, flexibility and sustainability. A thorough analysis of the applications of bamboo fibre is presented, encompassing a wide range of sectors such as textiles, clothing, home furnishings and technical textiles. The review encompasses both traditional uses in clothing and emerging applications in technical and functional textiles. Additionally, the paper addresses the challenges that arise in the utilization of bamboo fibre, including concerns regarding labelling accuracy and environmental claims.