2023 Vol. 42, No. 2

Display Method:
Research on Bamboo Furniture Form Design Based on Emotional Design
DONG Nian-ci, LI Zi-zheng, LI Hua, CHEN Wen-yi, CHEN Zu-jian
2023, 42(2): 1-14. doi: 10.12390/jbr2022117
Abstract(125) PDF(38)
Abstract:
【Objective】As the furniture industry develops rapidly,the application of bamboo in furniture is particularly important. With the continuous development of bamboo processing technology and advancement of bamboo modification technology,how to apply the bamboo furniture form more reasonably and effectively in furniture design is an urgent problem to be discussed. 【Method】 According to the principle of morphological composition,bamboo is divided into three parts,i.e. shape,color and texture,among which "shape" is composed of four parts:point,line,surface and body. Based on the principle of morphological composition of bamboo,this paper analyzes and considers different forms of bamboo from three emotional design levels:instinct,behavior and reflection. 【Result】On the basis of emotional design,the design of bamboo furniture should have breakthroughs in form,innovation in function and novelty in conception.【Conclusion】Finally,the design elements of bamboo furniture are originated from the morphological composition,providing a new idea for the modern design of bamboo furniture.
Evaluation of Uncertainty for Determination the Migration of Chromium in Bamboo Furniture's Material
GUO Fei-yan, CHEN Wei, GAN Mei-jiao, YANG Liu
2023, 42(2): 15-22. doi: 10.12390/jbr2023014
Abstract(84) PDF(43)
Abstract:
【Objective】 The uncertainty of migratable chromium is an important indicator for the confidence and accuracy of the test results. In order to master the method of testing the uncertainty in paint coatings on bamboo furniture,an evaluation technique for the uncertainty of migratable chromium was explored and established through the spectral analysis of ICP.【Method】 Through the comprehensive measurement of sample pretreatment,repeatability measurement,sample weighing and the test of the volume of hydrochloric acid,the concentration and dilution factor of the sample solution etc.,the study establishes an analytical mathematical model and evaluates the analytical uncertainty.【Result】 The results show that measurement repeatability and sample concentration are the main factors that cause uncertainty during the measurement process,especially in the fitting process of standard curves,the uncertainty generated has the greatest impact. 【Conclusion】 Measurement of migratable chromium needs to strictly follow the standard of solution preparation and standard curve fitting. At the same time,it's required to reduce the operation steps,increase the number of test repetition,and accordingly the uncertainty in the sample testing process will be reduced.
Shear Stress of Bamboo Scrimber-Strain Relationship and Extraction of Strength Characteristic Values
JIANG Feng-jiao, SHAO Wen-zhe, SHENG Ye, ZHANG Feng, WU Zhi-hong
2023, 42(2): 23-30. doi: 10.12390/jbr2022106
Abstract(111) PDF(29)
Abstract:
【Objective】 In order to comprehend the shear performance of bamboo scrimber and apply it to structure design safely and efficiently. 【Method】 Shear tests on three groups of small specimens of bamboo scrimber under different working conditions were carried out in this study,so as to study the mechanical properties and stress—strain relationship of the strength perpendicular to grain,parallel to grain and in plane shears of bamboo scrimber. 【Result】 The results showed that bamboo scrimber had the highest shear strength perpendicular to grain,the average value was 15.49 MPa,which was around 2.1 times that of shear parallel to grain strength and 2.7 times that of shear in plane. The specimens were classified according to the failure modes,and the relevant stress—strain expression was proposed. The calculation curve fit well with the test curve. 【Conclusion】 The test results were statistically analyzed by using both parametric and non-parametric methods. Based on the test values,the 5% quartile value and the parameter method tolerance limit (PTL) under the 75% confidence level were calculated,and the PTL is considered to better reflect the shearing mechanical characteristics of bamboo scrimber.
Study on Wettability and Permeability of Different Parts of Dendrocalamus giganteus
DONG Hao, HUANG Su-yong, YAO Kang, WAN Chun-min
2023, 42(2): 31-40. doi: 10.12390/jbr2022100
Abstract(104) PDF(40)
Abstract:
【Objective】In order to expand the available bamboo resources. 【Method】The surface wettability and overall permeability of different horizontal parts (bamboo green,bamboo flesh and bamboo yellow) and different longitudinal parts (root,middle and tip) of Dendrocalamus giganteus were studied by measuring the contact angle and volume permeability of D. giganteus timber with the aid of AFM and optical microscopy,providing a theoretical basis for the rational use of D. giganteus. 【Result】 The results showed that the overall permeability of the specimens after the removal of bamboo green and bamboo yellow increased by about 10% and the surface wettability increased by about 30%; the overall permeability and surface wettability of different longitudinal parts showed a trend of root > tip > middle,with the root being on an average of about 23% higher than the middle and 12% higher than the tip respectively. 【Conclusion】 The above data leads to the conclusion that D. giganteus, as a raw material,is suitable for the preparation of bamboo engineering materials for biomass construction.
Study on Surface Coating Process of Bamboo Scrimber
ZHONG Cheng-long, HOU Xian-feng, ZHUO Guang-wu, GAO Zhen-zhong, TU Deng-yun, HU Chuan-shuang
2023, 42(2): 41-47. doi: 10.12390/jbr2023012
Abstract(87) PDF(21)
Abstract:
【Objective】 As a new composite material in recent years,bamboo scrimber has excellent physical and mechanical properties and machining properties and has been used in many industries such as furniture and construction. The durability and physical properties of the material are reduced due to the complex use environment and the characteristics of moisture absorption and expansion of bamboo materials,which are also often exposed to the environment of high temperature,humidity and microbial diversity. To explore the influence of the surface coating process on the paint film performance of bamboo scrimber helps to solve the problem that the durability and physical properties of bamboo scrimber materials decrease in the complex environments. 【Method】 In this paper,we explored the changes in paint film properties of bamboo scrimber after coating in different process conditions,and mainly studied the effects of the sanding process,coating amount of polyurethane primer,spreading rate of nitrocellulose topcoat,drying conditions,and the number of coating times of nitrocellulose topcoat on the paint film properties during the coating process. 【Result】 The initial surface of bamboo scrimber was firstly sanded with 180-grit sandpaper and then 320-grit sandpaper;the coating amount of polyurethane primer was 120 g·m-2;on the basis that the coating amount of nitrocellulose paint upon the intermediate layer of was 250 g·m-2,the coating amount of nitrocellulose topcoat was 150 g·m-2,coated 1 time,and the film adhesion is grade 1,hardness is 2H,abrasion resistance grade is grade 1,gloss is 70.6,and water vapor resistance grade is grade 2. 【Conclusion】 This study has explored that the variation of the initial sanding process of bamboo scrimber,the amount of polyurethane primer coating,the amount of nitrocellulose topcoat coating,the drying conditions and the number of nitrocellulose topcoat coating have a great influence on the performance of the paint film,and the best coating process is:sand the surface of the bamboo scrimber with 180-grit sandpaper,then with 320-grit sandpaper,and then brush with 120 g·m-2 polyurethane paint,and dry it at room temperature for 1 hour. Lightly sand the surface with 320-grit sandpaper and brush it with 250 g·m-2 intermediate-layer nitrocellulose paint,and dry it at room temperature for 48 hours,lightly sand the surface with 320-grit sandpaper and brush the surface with 150 g·m-2 nitrocellulose topcoat and dry it at room temperature for 48 hours.
Effect of Storage Temperature on the Diversity of Endophytic Bacteria in Phyllostachys nuda Shoots
HUANG Zhi-yuan, MAO Chuan-liang, WAN Zhong, ZHANG Shu-han, LV Heng, MAO Wen-jun, ZHAO Xi-kai, LENG Li-song, BIAN Fang-yuan
2023, 42(2): 48-55. doi: 10.12390/jbr2023015
Abstract(74) PDF(23)
Abstract:
【Objective】 To investigate the effect of storage temperature on the diversity of endophytic bacteria of the harvested Phyllostachys nuda shoots so as to provide a theoretical basis for the further development of storage and preservation technology for the post-harvested Ph. nuda shoots. 【Method】 This paper takes Ph. nuda shoots as the object of study,the endophytic bacteria of Ph. nuda shoots were sequenced at different storage temperatures (-20 ℃,4 ℃ and 25 ℃) and the bioinformatics were analyzed by using high-throughput sequencing technology. 【Result】 The results showed that Ph. nuda shoots underwent different degrees of spoilage between various treatments after storage at different temperatures. Compared with storage at -20 ℃,less and more severe spoilage occurred at 4 ℃ and 25 ℃,respectively. In addition,the Alpha diversity of endophytic bacteria of the shoots changed significantly at different storage temperatures after harvesting,being characterized with an upward trend as the storage temperature increased;the Beta diversity also changed significantly,indicating that different storage temperatures significantly changed the community structure of endophytic bacteria in Ph. nuda shoots. With regard to the changes in the composition of endophytic bacteria communities in Ph. nuda shoots,at the phylum level,four phyla,Proteobacteria,Firmicutes,Cyanobacteria and Actinobacteria,showed the most significant changes in the composition of the endophytic community,with Proteobacteria being the most dominant phyla. Compared with storage at -20 ℃,storage at both 25 ℃ and 4 ℃ significantly increased the relative abundance of Firmicutes and significantly decreased the relative abundance of Proteobacteria;storage at 25 ℃ significantly increased the relative abundance of Actinobacteria and significantly decreased the relative abundance of Cyanobacteria,while 4 ℃ significantly increased the relative abundance of Cyanobacteria. At the genus level,the relative abundance of microorganisms in five genera,i.e. SerratiaPseudomonasErwiniaLactococcus and Lelliottia,showed more significant changes. Compared with storage at -20 ℃,both storage at 25 ℃ and 4 ℃ significantly increased the relative abundance of Lactococcus and Lelliottia,while storage at 4 ℃ also increased the relative abundance of Serratia and Erwinia. While storage at 25 ℃ increased the relative abundance of Pseudomonas. 【Conclusion】 Overall,the decrease in storage temperature significantly reduced the relative abundance of microorganisms in Actinobacteria,Firmicutes and Pseudomonas,among which the microorganisms usually promote the spoilage. Therefore,lowering storage temperature can effectively inhibit and slow down the spoilage effect of Ph. nuda shoots. This further explains that low-temperature storage can effectively prolong the freshness of bamboo shoots from the perspective of plant endophytic bacteria.
Study on Growth Characteristics of Lateral Rhizome Bud of Phyllostachys edulis
LI Jian-hua, LIN Xiao-yue, YUE Jin-jun, YUAN Jin-ling
2023, 42(2): 56-62. doi: 10.12390/jbr2023003
Abstract(148) PDF(50)
Abstract:
【Objective】 Research on the lateral rhizome bud differentiation and growth of Phyllostachys edulis is important for improving the yield of shoot and bamboo timber. 【Method】 The growth of rhizome lateral buds in on-year was studied by means of underground excavation and above-ground investigation. 【Result】 The results showed that rhizome lateral buds were 552 433 individual·hm-2,including 19 433 individual·hm-2 sprouted shoots,of which 3 543 individual·hm-2 shoots sprouted out of the ground and 1 479 individual·hm-2 have grown into bamboo. 20 550 individual·hm-2 sprouted shoots from mulched bamboo forests, and height of 75.80% of the abortive bamboo shoots was less than 30 cm,while the depth of the bamboo roots into the soil of 85.81% of the abortive bamboo shoots was within 10 cm,87.85% of the abortive bamboo shoots had fewer roots or no roots,and 12.15% abortive bamboo shoots had robust roots. 【Conclusion】 The bud differentiation of Ph. edulis is discontinuous and the germination rate is low. Mulching cultivation cannot significantly increase the number of lateral bud which differentiate,and the root plays a key role in the process of bamboo shoot formation. Therefore,inducing the lateral bud differentiation and increasing the root development can significantly improve the output of bamboo forests.
Study on Cultivation of Dictyophora echinovolvata by Using Mushroom Residue of Ganoderma lucidum
TIAN Su-kui, CHENG Liang, DING Min, LV Ming-liang, DU Ping-hai, JIANG Jun, DING Li-chao, LIU Kun
2023, 42(2): 63-67. doi: 10.12390/jbr2023006
Abstract(94) PDF(31)
Abstract:
【Objective】To explore the feasibility of reusing artificially cultivated substrate of edible fungi,so as to promote its low-carbon and environmentally friendly development. 【Method】The paper studied the cultivation feasibility of Dictyophora echinovolvata by using mushroom residue of Ganoderma lucidum and Moso bamboo (Phyllostachys edulis) chips. 【Result】 The results showed that cultivating D. echinovolvata by using waste Moso bamboo chips as a substrate had a yield of 12.59 kg·m-2;when 30% or 50% of the Moso bamboo chips were replaced by mushroom residue of G. lucidum,the yields were 13.08 kg·m-2 and 12.73 kg·m-2,respectively,there was no significant improvement in D. echinovolvata yields from the ones purely cultivated with bamboo chips,however,their budding time was delayed by 8 days and 11 days,and the harvest period was extended by 3 days and 7 days,respectively. Meanwhile,yield acromion of D. echinovolvata during the harvest decreased and the time range covering the main peak of production in the harvest period was expanded,which,to some extent,has slowed down the yield fluctuation of D. echinovolvata during the harvest period. 【Conclusion】 The cost of mushroom residue of G. lucidum is much lower than that of bamboo chips,take mushroom residue as the substrate batching for D. echinovolvata cultivation has a certain cost advantage compared with bamboo chips.
Investigation on Insect Pests of Bamboo Plants in Suichang and Their Occurence Dynamics of the Main Insects
HUANG Li-hua, ZHU Xu-hua, MIAO Guo-jun, LI Yong-xian, LIU Xi-dong, ZHANG Wei
2023, 42(2): 68-75. doi: 10.12390/jbr2022108
Abstract(99) PDF(24)
Abstract:
【Objective】With the changes of management model, the damage of bamboo pests becomes a serious problem in the healthy development of bamboo industry of Suichang county. Therefore, in order to provide a reference for the scientific pest control of bamboo in Suichang, the species of bamboo insect pests in Suichang were investigated systematically and comprehensively, and their occurrence dynamics were monitored. 【Method】From 2017 to 2021, the insects infested bamboo plants in Suichang were investigated and collected by comprehensive methods including random field survey, investigation of fixed sampling and light trap. 【Result】Totally, 111 species of bamboo insects were collected, of which nine species were the predominant insects such as Melanotus cribricollis, Hippotiscus dorsalis and Algedonia coclesalis. And the monitoring date showed the nine species were growing in population. 【Conclusion】Abundant pest insects infested bamboo plants are found in Suichang county, among which, the insects as defoliators, bamboo shoot feeders stinkbugs and aphids have occurred more and more seriously, it requires more and more attention.
Preliminary Study on the Construction and Operation Mode of Digital Service Platform of Carbon Sink Management for Bamboo Forest
CHAI Qing-hui, LENG Hua-nan, LIU Peng, WAN Zhong, WU Zhao-wei, LENG Li-song, YU Li-hua, ZHU Wei-rong, TANG Hui, HUANG Yun-feng
2023, 42(2): 76-80. doi: 10.12390/jbr2023017
Abstract(79) PDF(97)
Abstract:
【Objective】 In order to realize the standardized operation and management of bamboo forest for carbon sink and strengthen the guidance and service to the business entities of carbon sink projects. 【Method】 On the basis of analyzing the problems in the current bamboo forest carbon sink management,the author put forward the construction theory and component module of the digital service platform for bamboo forest carbon sink management and elaborated the operation mode of the platform from the following three elements,i.e. personnel management,operation management and fund management. 【Result】 Finally,a digital platform to support bamboo forest carbon sink management has been constructed. 【Conclusion】 The digital service platform of bamboo forest carbon sink management effectively fills up the gap of digital management and service of bamboo forest management for carbon sink,and provides an important reference for similar digital management of forestry carbon sink.
Three Dimensions of Bamboo Industry Development under the Background of Common Prosperity of Farmers and Rural Areas
XIAO Zhao-long, QIU Xi-yang, LI Zhi-chen
2023, 42(2): 81-86. doi: 10.12390/jbr2023018
Abstract(96) PDF(40)
Abstract:
【Objective】 The paper discusses the problems and development of bamboo industry through the industrial classification of three dimensions under the background of common prosperity of farmers and rural areas. 【Method】 Based on the characteristics of primary industry,secondary industry and tertiary industry,this paper analyzes the development status and problems of bamboo industry in China. 【Result】 At present,there are developmental problems of three dimensions in the bamboo industry:firstly,the production efficiency of bamboo resources is low and the protection foundation for the endangered species is weak;secondly,the industrial structure of bamboo products is single and the innovativeness is insufficient;thirdly,the traditional bamboo culture has not been sufficiently explored and the modernization transformation is weak. 【Conclusion】 In view of the above problems,first of all,we need to promote the bamboo forest compound management model,build an excellent bamboo seed resources bank,and enrich bamboo resources. Secondly,we need to develop bamboo forest carbon sink products,promote the structural reform of the supply side of bamboo products,and improve the supply quality of bamboo products. Finally,we need to carry forward the traditional bamboo culture and demonstrate cultural confidence. Therefore,we can fully spread and revitalize bamboo culture in the new era.
Long Bamboo Charm,on the Aesthetic Charm of the Bamboo Stone-paved Classical Garden in Yangzhou
LI Guo-xin, YANG Xu-fei, GAO Jing-ru
2023, 42(2): 87-92. doi: 10.12390/jbr2022128
Abstract(77) PDF(21)
Abstract:
The paper takes bamboo-the main plant morpheme as the breakthrough point,aiming to guide the readers,by appreciating 20 000 bamboo stands blending with the landscape,terrain,architecture in the garden and the aesthetic concept paved through the integration of spirits. Through visitors' objective feelings and subjective experience over the seasonal changes of the scenery,let the readers understand each unique aesthetic conception in Ge Garden. Having sorted out and studied the vigorous vitality of bamboo,many auspicious elements,rich historical and cultural materials and the code of Chinese civilization contained,the paper has roughly presented the civilization context of thousands of years of bamboo culture in China synthetically and sterically. By savoring the romance of bamboo culture,the paper guides the visitors to cultivate a bamboo-like steadfast sentiment,appreciate the auspicious wishes of peace reported by the bamboo (a family letter),so as to study and excavate the connotation of bamboo culture of the Chinese civilization. By the rich asthetic analysis of Ge Garden,we take this as the original point to radiate and extend the Chinese bamboo civilization fuller and more profound. The construction of Ge Garden contains the profound craftsmanship of thousands of years of Chinese bamboo civilization. The grass and trees in the garden are everywhere covered with aesthetic code of bamboo culture, making it a good place to experience and perceive bamboo civilization.