文献类型：期刊文献

中文题名：基于简单竞争指数的杉木人工林树冠形状模拟

英文题名：Canopy Shape Simulation of Chinese Fir Plantation Based on Simple Competition Index

作者：覃阳平[1] 张怀清[1] 陈永富[1] 蒋娴[1] 李永亮[1]

第一作者：覃阳平

机构：[1]中国林业科学研究院资源信息研究所

年份：2014

卷号：27

期号：3

起止页码：363-366

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家自然科学基金(31170590);国家863计划课题(2012AA102002);林业公益性行业科研专项(201104028)

语种：中文

中文关键词：杉木人工林;树冠形状;简单竞争指数;模拟

外文关键词：Chinese fir plantation; canopy shape; simple competition index;simulation

分类号：S757

摘要：以湖南省株洲市攸县黄丰桥国有林场杉木中龄林为研究对象,用逐步回归的方法建立以单木大小、单木竞争指标为自变量,冠幅、冠长为因变量的函数估算模型,实现林木树冠形状的模拟。研究结果显示:在杉木树冠形状模拟时,与竞争有关的冠幅模型、冠长模型的判定系数R2分别为0.771、0.872,显著高于与竞争无关的冠幅模型、冠长模型的调整的判定系数0.729、0.811,这说明竞争对树冠生长影响的作用是显著的。
The middle-aged Chinese fir stands of Huangfengqiao State - owned Forest Farm in Youxian County of Hunan Province were studied. In order to simulate the shape of individual tree canopy, stepwise regression method was used to build an estimation model. In the model, a function taking individual tree size and individual tree competition index as variables, the crown width and crown length as dependent variables was involved. The result showed that when simulating the shape of Chinese fir canopy, the determination coefficient （R2 ） of competition - re- lated crown width model and competition-related crown length model were 0. 771 and 0. 872, which were significantly higher than that of competition-unrelated model （which were 0. 729 and 0. 811 ）, which indicated that the competition had a significant effect on the growth of canopy.