首页 | 本学科首页   官方微博 | 高级检索  
     

柳杉人工林单木材积生长模型的研究
引用本文:江希钿 林文清. 柳杉人工林单木材积生长模型的研究[J]. 福建林学院学报, 1995, 15(4): 380-385
作者姓名:江希钿 林文清
作者单位:福建林学院林学系,福建省宁德地区林业局,屏南县林业局,福鼎县后坪林场
基金项目:福建省林业厅科学研究基金
摘    要:本文将柳杉人工林单株木的林积生长量作为年龄、地位指数、竞争指数的函数,建立单木生长模型。研究结果表明:简单竞争指数优于竞争压力指数,而在简单竞争指数中,竞争木取6株和8株差别不大,均优于竞争木取4株。进一步的分析表明:在不受人为干扰的林分中,竞争木取6株和8株的简单竞争指数在一定时期内保持相对稳定的状态,与林分年龄和立地质量关系不密切,而与胸径之间存在着密切的相关关系。其值随着胸径的增大而减小,二者之间的关系用双曲线和幂函数拟合较为适宜,由此建立的简单竞争指数预估模型,扩大了单木生长模型的运用范围。在理论上和实践上均有重要的意义。

关 键 词:竞争指数,单木生长模型,竞争指数预估模型,柳杉

Study on Single Tree Volume Growth Model for Cryptomeria fortunei Plantation
Jiang Xidian. Study on Single Tree Volume Growth Model for Cryptomeria fortunei Plantation[J]. Journal of Fujian College of Forestry, 1995, 15(4): 380-385
Authors:Jiang Xidian
Abstract:Taking age, site index and competition index as arguments, the single tree volume growth model is established for Cryptomeria fortunei plantation in this paper. During modeling,It is the key to calculate competiton index,the calculating trsults indicate that selecting simple competition index is superior to competition suppressed index for establishing model.It is the better to select six competition trees adjacent to objective tree for calculating simple competition index.In undisturbed stands, simple competition index isn't relative to age and site index but relative to HD,that is decreasing with the DH increading, and it is the better for simulating this relationship with power function or hyperbola. Based on foregoing condition,the predicting model of simle competition index is established, that may enlarge the appliable range of the single tree volume growth model.
Keywords:competition index  single tree volume growth model   Cryptomeria fortunei
本文献已被 CNKI 维普 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号