塞罕坝国家森林公园华北落叶松单木冠幅预测模型  

Prediction Model of Single Tree Crown Width of Larix principis-rupprechtii in Saihanba National Forest Park

作　　者：孙朝辉 SUN Chaohui(Saihanba Mechanical Forest Farm of Hebei Province,Chengde 068450)

机构地区：[1]河北省塞罕坝机械林场,河北承德068450

出　　处：《林业勘查设计》2023年第5期88-94,共7页Forest Investigation Design

摘　　要：基于河北省塞罕坝国家森林公园华北落叶松纯林4块标准地458株华北落叶松样木数据,构建了华北落叶松单木冠幅预测模型。通过分析华北落叶松冠幅变化规律以及冠幅与林木竞争因子的关系,从6种常用的线性和非线性冠幅模型的基础模型中选取最优模型,加入其他树木变量和林分变量,构建华北落叶松单木冠幅预测模型,并对所构建的模型进行评价。华北落叶松冠幅与冠长率(CR)成正相关,与高径比(HD)成负相关;包含树木变量和竞争因子的华北落叶松冠幅模型拟合冠幅的Ra2分别为0.4845;包含树木变量(CR)、竞争因子(HD)的华北落叶松模型具有较好的拟合效果及预测精度。研究所构建的冠幅模型对华北落叶松的冠幅预测能力较好,为进一步研究华北落叶松树冠结构提供了基础。Based on the data of 458 Larix principis-rupprechtii like trees in four standard plots of pure Larch Forest in Saihanba National Forest Park,Hebei Province,this paper constructs a single-wood canopy prediction model for Larix principis-rupprechtii.By analyzing the variation law of the crown width of Larix principis-rupprechtii and the relationship between crown width and tree competition factors,the optimal model was selected from the basic models of six commonly used linear and nonlinear crown width models,and other tree variables and forest stand variables were added to construct a single tree crown width prediction model of Larix principis-rupprechtii,and the constructed model was evaluated.The crown width of Larch in North China is positively correlated with the crown length rate(CR)and negatively correlated with the high diameter ratio(HD).The Ra2 of the Larix principis-rupprechtii crown width model fitted with tree variables and competitive factors was 0.4845,respectively.The Larix principis-rupprechtii model containing tree variables(CR)and competition factors(HD)has good fitting effect and prediction accuracy.Therefore,the crown width model constructed by this institute has good predictive ability to predict the crown width of Larix principis-rupprechtii,which provides a basis for further study of the canopy structure of Larix principis-rupprechtii.

关 键 词：华北落叶松 冠幅 冠长率 单木模型 国家森林公园 河北塞罕坝 

分 类 号：S759.91[农业科学—森林经理学] S791.22[农业科学—林学] S758.5S711