Cheng Chih-Hsin, Lee Pei-Chen, Lee Hong-Rue, Chen Chiou-Pin, Menyailo Oleg V
School of Forestry and Resource Conservation, National Taiwan University, Taipei, 106, Taiwan.
NTU Experimental Forest, National Taiwan University, Taipei, 106, Taiwan.
Bot Stud. 2023 Jul 19;64(1):22. doi: 10.1186/s40529-023-00395-8.
Dendrometer bands have been proposed as an accurate method for measuring tree growth. However, the constrained observation window and the material used in them hamper long-term tree growth monitoring. This study devised a dendrometer band made from stainless steel and primarily extended the extension length of the band spring to yield ample space to monitor diameter increments long-term. A total of more than 500 individual trees, including both coniferous and broadleaf trees, were examined. We compared the dendrometer band's long-term performance with diameter tape for 5- and 10-year measurements. The results showed that the measurements of the two methods were highly correlated (R > 0.89) in both measuring periods. Differences between the two measurements for individual trees were typically less than 5 mm, and the mean differences at a stand level were less than 2 mm. These consistent observations suggested that the dendrometer band measurements were reliable for long-term measurement. Using the dendrometer bands, we further demonstrated the annual tree growths of diameter at breast height (DBH) and basal area (BA) for ten years of measurements. The size-dependent relationships between DBH/BA growth and initial DBH were also presented. Owing to their simple installation, low cost, and reliable measurement, these dendrometer bands would be helpful in forestry and forest ecology research.
树木测径带已被提议作为一种测量树木生长的精确方法。然而，其有限的观测窗口以及所使用的材料阻碍了对树木生长的长期监测。本研究设计了一种由不锈钢制成的树木测径带，并主要延长了带簧的伸展长度，以获得足够空间来长期监测直径增量。总共对500多棵单株树木进行了检测，包括针叶树和阔叶树。我们将树木测径带的长期性能与用于5年和10年测量的围尺进行了比较。结果表明，在两个测量期内，两种方法的测量结果高度相关（R＞0.89）。单株树木两种测量结果之间的差异通常小于5毫米，林分水平上的平均差异小于2毫米。这些一致的观测结果表明，树木测径带测量结果对于长期测量是可靠的。使用树木测径带，我们进一步展示了十年测量中胸径（DBH）和断面积（BA）的年树木生长情况。还呈现了DBH/BA生长与初始DBH之间的大小依赖关系。由于其安装简单、成本低且测量可靠，这些树木测径带将有助于林业和森林生态学研究。
