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植物研究 ›› 2014, Vol. 34 ›› Issue (4): 547-553.doi: 10.7525/j.issn.1673-5102.2014.04.020

• 论文 • 上一篇    下一篇

基于树冠竞争因子的落叶松人工林单木生长模型

刘强;李凤日*;董利虎   

  1. 东北林业大学,哈尔滨 150040
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2014-07-20 发布日期:2014-07-20
  • 通讯作者: 李凤日
  • 基金资助:
     

Individual Tree Growth Model of Larch Plantation based on Crown Competition Factors

LIU Qiang;LI Feng-Ri*;DONG Li-Hu   

  1. Northeast Forestry University,Harbin 150040
  • Received:1900-01-01 Revised:1900-01-01 Online:2014-07-20 Published:2014-07-20
  • Contact: LI Feng-Ri
  • Supported by:
     

摘要: 基于黑龙江省佳木斯市孟家岗林场落叶松人工林14块固定标准地的两期调查数据(2007、2009年),通过分析树冠变量与林木生长的关系,构建了2个树冠竞争指数(CIaCIb),并将其作为单木竞争指标构建了落叶松人工林与距离有关的单木生长模型。研究结果表明:文中提出的二个树冠竞争指数优于Hegyi竞争指数(CI),落叶松各个竞争指数与林木断面积生长量相关性大小顺序为CIb>CIa>CI。随着对象木影响圈的扩大,竞争指数趋于稳定,对模型的拟合效果有所提高。林木大小是影响落叶松单木生长的主要因子,胸径越大,单木生长量越大。通过引入与距离有关的树冠竞争指数将单木模型的拟合优度提高了5.6%。本文构建的与距离有关的单木生长模型可以很好地预估人工落叶松单木的断面积生长量。

关键词: 落叶松人工林, 树冠竞争指数, 单木生长模型

Abstract: Based on the re-easured data between 2007-2009 from 14 permanent sample plots in larch plantations located in Mengjiagang Forest Farm, Jiamusi city of Heilongjiang province, the relationship between crown variables and increment of tree was analyzed and the distance-ependent individual tree growth model for larch plantation was developed by introducing two crown competition factors (CIa and CIb) as new competition index in this paper. The results showed that two crown competition factors (CIa and CIb) are better than the Hegyi competition index (CI). The correlation between various competition index with basal area increment of individual tree is CIb>CIa>CI for larch plantation. With enlargement of the competition influence zone of object tree, the competition index tends to be stable and the model fitting effect increases. Tee size is the main affecting factor for the individual tree growth for larch plantation. The basal area increment of individual tree increases as tree diameter at breast height increasing. The goodness of fit for individual tree growth model was improved 5.6% by introducing new distance-ependent crown competition index. The distance-ependent individual tree growth model developed in this paper can be suitable for predicting basal area increment of individual tree for larch plantation.

Key words: larch plantation, crown competition factor, individual tree growth model

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