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• 方法与技术 • 上一篇    下一篇

利用GIS工具测定树木圆盘年轮的方法

孟盛旺,周光,于健,周华,刘琪璟*   

  1. (北京林业大学林学院, 北京 100083)
  • 出版日期:2017-06-10 发布日期:2017-06-10

Measuring stem disk rings using GIS tools.

MENG Sheng-wang, ZHOU Guang, YU Jian, ZHOU Hua, LIU Qi-jing*#br#   

  1. (College of Forestry, Beijing Forestry University, Beijing 100083, China).
  • Online:2017-06-10 Published:2017-06-10

摘要:

树木圆盘年轮宽度测定是研究树木生长过程、森林生产力的重要基础,也是测树学中至关重要的一项技能。为简洁高效地测定圆盘年轮宽度,本文介绍了3种借助图像处理软件测定年轮宽度的方法。该方法基于扫描或拍照后的圆盘图像,利用地理信息系统软件对年轮坐标信息进行提取,根据两点之间距离公式计算各年轮宽度。此法不仅可以提高测量精度,而且成本低廉,在不具备专业年轮测定仪器或软件时,更有利于发挥其作用。
 

关键词: 生态化学计量学, 根系去除, 土壤有机碳, 凋落物去除, 土壤物理性质

Abstract: Treering width measurement is not only an important basis for studying tree growth process and forest production, but also a crucial skill in forest measurement. The objective of this study was to propose three methods which take advantage of image processing software for measuring ring widths of stem disk. Based on highresolution image scanned or took by camera, coordinate information was extracted with the help of geographic information system (GIS). The ring widths were then computed as the distance between two points. This approach could not only improve the measuring accuracy, but also make the measurement more costeffective. In addition, it is especially practical when specialized instruments are not available.

Key words: litterfall removal, root removal, ecological stoichiometry, soil physical property, soil organic carbon