2021 Vol. 40, No. 1

Display Method:
The Status Quo and Trend of World Bamboo Forest Certification
XIA En-long, SU Hai-ying, YUAN Mei, LI Zhi-yong, YU Tian-fei
2021, 40(1): 1-5.
Abstract(500) PDF(100)
Abstract:
Bamboo resources, the most potential forest resources in the 21st century, are widely distributed in Asia, Africa and Latin America countries. The development of bamboo forest certification is of great significance in protecting global forest resources, tackling climate change and reducing regional poverty. However, the development of bamboo forest certification is slow in the world, and there exist many problems still in the authentication mechanism, market regulation and consumer guide, etc. This paper aims to analyze the development status quo of bamboo forest certification in the world, to explore its demand and potential, to summarize the existing problems, and to put forward the development trend and suggestions of bamboo forest certification in the future.
Research Progress in Waterborne Coating of Bamboo
LIN Xin-yu, ZHANG Qiu-hao, HUANG Quan-fei, ZHANG Wei, WEI Rong-jun, WENG Yu, HUANG Yan-hui, FEI Ben-hua
2021, 40(1): 6-10.
Abstract(663) PDF(75)
Abstract:
Waterborne coatings are environmentally friendly coatings with water as the solvent. It is widely used under the increasingly stringent environment protection policy. Due to the dense structure and poor permeability of bamboo, the adhesion ability of waterborne coating on bamboo is weak and the coating effect is poor. In this paper, the classification and performance of waterborne coating were reviewed, the combination mechanism of waterborne coating and bamboo was expounded, the factors affecting the coating of bamboo were pointed out, the research progress of waterborne coating on bamboo at present was summarized, and its development direction were proposed so as to promote the development of waterborne coating of bamboo.
Bambusa suijiangensis, A New Species of Bambusa from Guangdong, China
NI Jing-bo, NIU Zheng-yang, ZHENG Xi-rong, WU Guang-min, TONG Yi-hua
2021, 40(1): 11-15.
Abstract(759) PDF(110)
Abstract:
Bambusa suijiangensis, a new species from Guangdong, China, is described and illustrated. The new species is morphologically similar to B. albolineata, but differs in basal part of culm being straight and without stripes, culm leaf with larger and obviously wavy auricles and longer lemmas and anthers.
Effects of Chemical Pretreatment on the Growth of TiO2 Nanoparticles on the Bamboo Surface
LI Jing-peng, MA Ru-min, WU Zai-xing, BAO Yong-jie, CHEN Yu-he
2021, 40(1): 16-21.
Abstract(605) PDF(83)
Abstract:
Using NaOH,HCl,and NaCl as pretreatment reagents,under different solution concentrations (0.1%,1%,4%,8%),the main chemical components of bamboo before and after treatment were analyzed. The changes in the chemical composition and morphology of the bamboo before and after chemical pretreatment were characterized by Fourier transform infrared-attenuated total reflectance spectroscopy (FTIR-ATR),X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) to obtain the main change and mechanism. Furthermore, the influence of chemical pretreatment on the growth of TiO2 nanoparticles on the bamboo surface was investigated. The results showed that after 10 min treatments, compared with original bamboo,HCl and NaCl-treated bamboo,the characteristic peaks of NaOH-treated bamboo at 1 730 cm-1 and 1 238 cm-1 were changed significantly, decreasing gradually with the increase of NaOH solution concentration. According to the XPS results,the hydroxyl (-OH) on the bamboo surface can be completely replaced by Na ions after 4% NaOH treatment. Increasing the concentration to 8% will not continue to increase the Na content. In addition,the SEM and XPS results indicated that the NaOH pretreatment can promote the loading of TiO2 nanoparticles on the bamboo surface.
Plant Nutrition Status in Flowering Process of Bashania Fargesii—a Staple Food of the Gaint Pandas in Qinling Mt.
DU Xi-chun, ZHANG Jiu-dong, GUO Cheng-yuan, HE Xiang-bo, ZHAO Yin-ping
2021, 40(1): 22-26.
Abstract(527) PDF(66)
Abstract:
The leaf SPAD values of three Bashania Fargesii populations at different growth stages, i.e., vegetative growth, bud initiation and development, and flowering stage, were compared in this study. The average leaf weight, average mass and number of leaves per branch weight were measured at the same time. The results showed that the relative content of chlorophyll decreased by about 10% from the vegetative stage to the bud initiation and development stage, during flowering, the average weight of leaves decreased by 80%, especially the average weight ratio of leaves per branch weight decreased by 90%, resulting in a decrease of photosynthetic efficiency and assimilation ability. This indicated that the leaf nutrient status and morphological structure were closely related to the flowering process. The leaf average weight and the ratio of leaf weight to branch weight of Bashania Fargesii were sensitive morphological and structural indexes, which could be used as warning indexes for flowering. This study may enrich the theory of bamboo flowering and provide a decision-making basis for the conservation of the Giant Pandas.
Equilibrium Moisture Content and Dimensional Stability of Flattened Bamboo Softened by High Temperature Saturated Steam
YU Wen-jun, YING Wei-jun, ZHONG Jin-huan, ZHANG Wen-biao
2021, 40(1): 27-31.
Abstract(501) PDF(72)
Abstract:
In order to explore the water content, maintenance and balancing, and storage of flattened bamboo for the purpose of theoretical guidance to manufacture, the equilibrium moisture content in the absorption and desorption process of flattened bamboo softened by saturated steam at different temperature, and their volume shrinkage and expansion rates have been investigated. The results showed that (1) with the coordination effect of high temperature saturated steam softening and flattening influence, the equilibrium moisture content in the absorption and desorption process of flattened bamboo were significantly lower than that of wood counterparts under the same conditions. The optimal equilibrium moisture content of flattened bamboo softened at 160℃ and 180℃ was 65.17% and 62.40%, respectively, when in good ventilated condition, the appropriate time for curing and maintenance of bamboo material was set at 250-350 h; (2) equilibrium moisture content in the absorption and desorption process of bamboo flattening at 180℃ was higher than that at 160℃, the higher softening temperature, the lower equilibrium moisture content in the absorption and desorption process of the flattened bamboo; (3) volume shrinkage and expansion rates of flattened bamboo softened by saturated steam at 180℃ were lower than that of softened at 160℃, which demonstrated that high softening temperature contribute to the better dimensional stability.
Preparation of Bamboo Cellulose/Mg-Al LDH Composite Aerogel and Its Adsorption Performance for Chromium (CrO42-)
SHEN Xiao-yuan, DUAN Xin-peng, JIN Yang-bing, ZHANG Ping, WANG Zhe, JIN Chun-de
2021, 40(1): 32-37.
Abstract(568) PDF(87)
Abstract:
Magnesium-aluminum layered double hydroxide (Mg-Al LDH) and bamboo pulp paper were used as raw materials, and bamboo cellulose/Mg-Al LDH composite aerogels with adsorption function of CrO42- in water were prepared by the methods of ball milling assisted physical blending and one-step freezing. The effects of Mg/Al molecular ratio of Mg-Al LDH, dosage ratio of composites and pH value of water on the adsorption properties of bamboo cellulose/Mg-Al LDH composite aerogel CrO42- were studied in detail. The morphology and chemical structure of aerogel before and after adsorption were characterized by SEM, TEM, FT-IR, XRD and XPS, and the change of CrO42- concentration was tested by ICP-OES. The results showed that Mg-Al LDH grew well in the bamboo fiber skeleton channel and formed a three-dimensional hierarchical porous structure with a specific surface area of 203.4 m2·g-1. The adsorption performance of bamboo cellulose/Mg-Al LDH composite aerogel for CrO42- was obviously better than that of Mg-Al LDH, and it was stable in a wide range of pH (4:10), and the maximum adsorption capacity reached 28.60 mg·g-1.
Effects of Slow-Release Fertilizer and Its Application Method on the Photosynthetic Characteristics of Phyllostachys violascens
HU Jun-jing, HE Qi-jiang, HUA Jin-xin, TIAN Nan, LEI Yi-chen, CAI Ting, CHEN Li-hua
2021, 40(1): 38-43.
Abstract(430) PDF(61)
Abstract:
In order to study the effects of slow-release fertilizer and its application method on the photosynthetic characteristics of Phyllostachys violascens, the chlorophyll content and photosynthetic characteristics of Ph. violascens leaves were determined with three treatments, i.e. conventional fertilization, hole or furrow application of slow-release fertilizer. The results showed that the photosynthetic performance of Ph. violascens leaves under slow-release fertilizer treatment was significantly improved compared with conventional fertilization. The chlorophyll content, photosynthetic rate, stoma conductance, intercellular CO2 concentration and water use efficiency of Phyllostachys violascens leaves increased in different degrees compared with conventional fertilization, and the stomatal limitation decreased; the photosynthetic physiology of Phyllostachys violascens leaves had an obvious "age effect" in response to slow-release fertilizer application method; both 1-year-old and 2-year-old Phyllostachys violascens were significantly improved by furrow application of slow-release fertilizer. Therefore, it is recommended to use slow-release fertilizer by furrow application as the main method of external nutrient input in practice.
Rooting and Seedling Strengthening Techniques of Tissue Culture Seedlings of Pseudosasa japonica f. akebonosuji
GAO Hui-bin, ZHENG Ren-hong, ZHOU Guo-qiang, YANG Hai-Yun, YU Ying
2021, 40(1): 44-51.
Abstract(343) PDF(44)
Abstract:
The effects of NAA, IBA, 6-BA and TDZ on adventitious root induction and seedling strength of Pseudosasa japonica f. Akebonosuji were studied by using tissue culture seedlings as experimental materials. The results showed that NAA played a leading role in adventitious root induction, and the effect was better than that of IBA alone, much better than that of the combination of NAA, IBA and 6-BA. When the concentration of NAA was 0.5-2.0 mg·L-1, the rooting rate reached 100% in 50 days. Under the concentration of 0.5 mg·L-1, the rooting rate was 80% in 15 days and 100% in 30 days. The average rooting number was 6.95 and the average root length was 0.995cm. When NAA concentration was 0.2-0.5 mg·L-1, the seedling effect was good, the multiplication coefficient was up to 8.5, and the average new bud length amounted to 1.595cm.The addition of activated carbon, 6-BA or TDZ could inhibit rooting and proliferation.
Altitude on Effect of Leaf Characters and Allometric Scaling of Phyllostachys edulis
HU Rui-cai, XU Sen, CHENG Jian-xin, LAN Chun-bao, CHEN Shuang-lin, GUO Zi-wu
2021, 40(1): 52-58.
Abstract(378) PDF(44)
Abstract:
Phyllostachys edulis is an excellent bamboo species for shoot and timber production. In order to reveal the effect of altitude on the leaf characters and allometric scaling of Ph. edulis, and to provide a theoretical reference for efficient management of bamboo forests, the main leaf characters and allometric scaling of 1-3 age-class Ph.edulis leaves at three elevations, i.e., low altitude (230±10)m, middle altitude (570±10)m and high altitude (870±10)m, were measured and analyzed. The results showed that the leaf length, width, area, thickness and dry weight of Ph. edulis increased with the increase of age or altitude. With the increase of bamboo age, the specific leaf area decreased at the same altitude, while the AF values of leaf width and leaf area at high altitude increased at first and then decreased. The specific leaf area decreased with the increase of altitude, in which the specific leaf area of 2-3 age-class bamboos at low altitude was significantly higher than that at middle and high altitude, the leaf width AF of 2 age-class standing bamboo increased significantly, and the difference between low and high elevations was significant. The leaf area AF of 3 age-class standing bamboo decreased at first and then increased, and at the middle altitude it was significantly lower than that at the low and high elevations. There was an allometric scaling among leaf length, leaf width and leaf area at different altitude. With the increase of altitude, the slope of leaf length-leaf area decreased at first and then increased, and there were significant differences among different elevations. Leaf width-leaf area and leaf width-leaf length have a common slope, and their intercept generally increased with the increase of altitude. The results showed that altitude had a significant effect on the leaf characters and allometric scaling relationship of Ph. edulis. With the increase of altitude, the leaf showed a trend of enlargement and thickening, and the leaf length was sensitive to the change of altitude, but the ratio of leaf length to width changed little, and the leaf morphology was relatively stable. At middle altitude, Ph. edulis forest had relatively large leaf length, leaf width and leaf area, as well as relatively high production potential, so it is a suitable altitude for Ph. edulis forest cultivation.
Density Test of Powdered Bamboo Charcoal Based on Response Surface Methodology
YING Ning-ning, LI Wen-zhu, LI Xiao-qing, JIANG Wen-zheng, ZHANG Wen-biao
2021, 40(1): 59-63.
Abstract(392) PDF(43)
Abstract:
The density of powdered bamboo charcoal was measured by vibrating density method. The box Behnken response surface method was used to establish a quadratic mathematical model to analyze the influence of various factors and their interaction on density, in which, the particle size (mesh) of powdered bamboo charcoal, the rotation speed and vibration times of vibrating instrument were taken as investigation factors, and the density of bamboo charcoal was taken as response value. The results showed that under the model conditions, the optimal parameters of bamboo charcoal density test were as follows:powdered bamboo charcoal particle size 120-160 mesh, rotation speed 200 r·min-1 and vibration frequency 1 000 times, the predicted density was 0.498 g·cm-3, the average result of validation experiment was 0.483 g·cm-3, and the deviation from the predicted value was 0.015.
Parametric Construction and Integrated Application of Bamboo Weaving Structure
JIANG Xiao-bin, FU Gui-tao
2021, 40(1): 64-72.
Abstract(747) PDF(107)
Abstract:
The paper aims to study the parametric construction and integrated application of traditional bamboo weaving structure, in order to give full play to its structural characteristics and improve its comprehensive benefits. When combined with additive manufacturing, it can be used with better applicability. First, the elements of the traditional bamboo weaving structure were excavated, and then different functional values of various structures were summarized and analyzed. Next, the bamboo structure was constructed by Grasshopper program, and the multi-layer composite braided structure was reconstructed from different functional perspectives. Finally,the designed structure was applied to various modern products. Taking the sole structure as the main design object, through the research and redesign of the traditional bamboo structure, a new multi-layer composite braided structure was obtained by using the parametric design method from the perspectives of friction and cushioning support. By using grasshopper parametric method, the multi-layer composite braided structure was designed, which has broken through the shackles of traditional bamboo weaving, and made bamboo weaving structure more spacious to play and use, providing a new design idea for bamboo weaving structure products.
The Design Transformation of Dongyang Bamboo Weaving Cultural Gene-a Case Study of Bamboo Weaving Lamps
WU Yi-xiang, LI Jing-ping, ZHANG Hong-yang, LU Ling
2021, 40(1): 73-78.
Abstract(639) PDF(68)
Abstract:
The transformation of production paradigm and communication path in the agricultural era led to the decline of traditional bamboo weaving technology. In order to promote the activation and inheritance of Dongyang traditional bamboo weaving technology, this paper attempts to combine Dongyang traditional bamboo weaving technology with modern lamp design by using charm engineering theory. First of all, the charm factors of bamboo lamps were explore by the evaluation structure method, based on analysis and screening, it was found that the most representative user preference style was the beauty of simplicity, the beauty of light and shadow, the beauty of image. Then, the design strategies on the specific performance elements such as lamp shape modeling, bamboo pattern, light and shadow design, were put forward. Finally, the effectiveness of the design strategy was verified by the design practice. The results showed that the application of evaluation construction method can effectively establish the relationship between user preferences and specific design features of bamboo lamps, and develop bamboo lamps in line with modern life aesthetics, which can not only promote the modern transformation of Dongyang traditional bamboo weaving technology, but also provide some reference for the inheritance and development of other traditional handicrafts.
A Study on Bamboo Ware and Culture in Anji County
LI Guo-qing, ZHOU Chang-ping, HUANG Yun-feng
2021, 40(1): 79-81.
Abstract(588) PDF(55)
Abstract:
In this study, the local bamboo utensils and types in Anji County were collected and researched, and the historical documents and archaeological data were verified. Then, the historical origin and cultural characteristics of the folk use of bamboo in Anji were expounded.
Protective Development of Bamboo Culture Based Sports Resources under the Background of New Situation
DI Jing
2021, 40(1): 82-86.
Abstract(307) PDF(41)
Abstract:
Bamboo culture based sports resources are important natural resources, sports resources and intangible cultural heritage in China. This paper studied the protective development of bamboo culture and sports resources under the new situation background, and analyzed the types of bamboo culture based sports resources, including track and field, ball games, water sports, etc. The distribution of bamboo culture based sports resources in China was summarized, and the new situation of their development was analyzed. It is suggested that the protective development of bamboo culture based sports resources under the new situation should pay attention to the cultivation of inheritor, strengthen the importance of bamboo culture and sports in school physical education, and provide a modern communication platform for the protective development.
The Modern Inheritance and Regeneration of Traditional Bamboo Weaving Handicraft
MA Jing-zhao
2021, 40(1): 87-90.
Abstract(543) PDF(66)
Abstract:
The combination of traditional rural handicraft and contemporary people's leisure, entertainment and consumption is not only the basis for enhancing the competitiveness of traditional rural handicraft market, but also one of the important ways to realize rural revitalization and solve the problems of agriculture, rural areas and farmers. In this paper, the traditional bamboo weaving in rural areas was taken as the main research object, and the modern inheritance and regeneration ways of bamboo weaving were studied. The inheritance and development of traditional rural handicrafts in China were analyzed from the perspectives of diversified inheritance ways,characteristic transformation, brand management and technological innovation of bamboo weaving.