Analysis methods and characteristic parameters of wood microstructure

Qi Chusheng, Zhan Zhibin, Dai Lu

Abstract：

Wood is a multi-scale and highly anisotropic natural polymer material, which consists of cellulose, hemicellulose, lignin and other components of a complex three-dimensional network structure. These structures are the key factors affecting micro-macroscopic physical and mechanical properties of wood, and the microstructure and main characteristic parameters of wood are of great significance to the understanding of properties of wood as well as wood modification and processing and utilization. This paper comprehensively analyzes the methods of wood microstructure analysis and summarizes its main characteristic parameters. In terms of analytical methods, microscopic observation, X-ray radiography and diffraction analysis, computed tomography and other technologies were widely used, combined with data acquisition and two-dimensional and three-dimensional imaging methods, can reconstruct wood microstructural models, measure microstructural parameters, and reconstructed structural models revealed clearer micro-morphological features. The microstructural parameters of wood mainly include cellular structure parameters, porosity, cellulose microfilaments and other parameters of wood. At present, the observation and study of microstructure is mostly limited to the micron scale, and the analysis of nanoscale and smaller molecular scale structure is mainly based on theoretical simulation, and the structural analysis methods that can be directly observed and characterized need to be further studied in depth.

Bottleneck problems and their solutions in the industrialization process of Eucommia ulmoides

Kang Xiangyang

Abstract：

Eucommia ulmoides is a unique and multipurpose economic tree species endemic to China, possesses remarkable developmental potential due to its abundant Eucommia rubber (Eu-rubber) and various medicinal compounds in leaves, bark and other tissues. This paper provides a comprehensive review of the research and development history of Eucommia ulmoides industry in China over the past 60 years, identifying the persistently high costs of raw material production or extraction as a critical bottleneck hindering substantial advancements in the Eu-rubber industry. Particularly in the current era where traditional farmers are gradually disappearing, the labor-intensive arbor forest management model for leaf or fruit-oriented cultivation struggles to support large-scale, low-cost raw material production due to constraints in human resources and rising labor costs. To address this challenge, it is essential to develop high-yielding triploid Eucommia ulmoides varieties with enhanced Eu-rubber and medicinal properties, coupled with a raw material production model based on leaf forest cultivation and mechanized harvesting. This approach can shorten production cycles and reduce planting, management and harvesting costs. Additionally, adopting an organ-specific whole-plant processing and utilization model can help distribute raw material costs more evenly and improve economic efficiency. Consequently, the primary bottleneck restricting Eucommia ulmoides industrialization has shifted to the integration of capital and advanced technologies. We therefore suggest that governments and industry alliances leverage their organizational strengths to effectively consolidate resources such as capital, technology, talent and market access, fostering co-creation, shared responsibility, and mutual benefits. This will promote the linkage, integration, and sustainable development of the first and second industries in Eucommia ulmoides resource cultivation, processing and utilization.

Review on the evaluation of global forest carbon sink function

Fu Yujie, Tian Di, Hou Zhengyang, Wang Minggang, Zhang Naili

Abstract： “Forest is a carbon sink” vividly explains the strategic position of forests in ... [Review Detail]

Forest carbon sequestration potential in China under the background of carbon emission peak and carbon neutralization

Zhang Ying, Li Xiaoge, Wen Yali

Abstract： Objective Carbon reserves and value of forest resources in China should be calcu... [Review Detail]

Response of cone yield in clonal seed orchard of Larix kaempferi to long-term nitrogen, phosphorus and potassium formula fertilization

Hu Menghong, Lü Xun, Wu Chunyan, Xie Yunhui

Abstract： Objective This paper aims to reveal the effects of different proportions of nitr... [Review Detail]

Effects of super absorbent polymer dosage on growth, photosynthetic characteristics and stress-resistance physiology of Populus euphratica seedlings

Liu Chenyu, Ma Rui, Luo Wenjing, Han Lu, Wang Haizhen

Abstract： Objective This study examined the effects of polyaspartic acid (PASP) dosages on... [Review Detail]

Bioinformatics and stress response expression analysis of poplar HSF family genes

Wang Xueyi, Gu Yongmei, Zhang Xuemei, Jiang Tingbo, Liu Huanzhen

Abstract： Objective This paper aims to investigate the key role of heat shock transcriptio... [Review Detail]

Effects of low temperature stress on chlorophyll metabolism of Zoysia japonica

Li Lijing, Zhang Zhiwei, Xue Yun, Zhang Jiahang, Han Liebao, Xu Lixin

Abstract： Objective Zoysia japonica is a warm season lawn grass, which has many excellent ... [Review Detail]