[1]欧建德. 基于简单竞争指数的南方红豆杉人工林树冠形状模拟[J].西北林学院学报,2020,35(5):110-115.[doi:10.3969/j.issn.1001-7461.2020.05.17]
　OU Jian-de. Crown Shape Simulation of Taxus chinensis var. mairei Plantation Based on Simple Competition Index[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2020,35(5):110-115.[doi:10.3969/j.issn.1001-7461.2020.05.17]
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 基于简单竞争指数的南方红豆杉人工林树冠形状模拟()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第35卷
期数:
2020年第5期
页码:
110-115
栏目:
出版日期:
2020-09-30

文章信息/Info

Title:
 Crown Shape Simulation of Taxus chinensis var. mairei Plantation Based on Simple Competition Index
文章编号:
1001-7461(2020)05-0110-06
作者:
 欧建德
 (福建明溪县林业局，福建 三明 365200)
Author(s):
 OU Jian-de
 (Forestry Bureau of Mingxi County,Sanming 365200,Fujian,China)
关键词:
 ; 南方红豆杉; 竞争指数; 树冠形状; 模拟; 优化
Keywords:
Taxus chinensis var. mairei;  competition index;  crown shape;  simulation;  optimization
分类号:
S791.49
DOI:
10.3969/j.issn.1001-7461.2020.05.17
文献标志码:
A
摘要:
 以福建省明溪县南方红豆杉人工林为对象，用逐步回归方法建立以单木大小、单木竞争指数为自变量，南方红豆杉冠幅、冠长、冠形率和树冠率等为因变量的树冠形状数学模型，并根据数学模型的判定系数，筛选出树冠形状优化模型。采用独立样本的检验方法，对优选南方红豆杉树冠形状模型进行t检验与偏差检验。结果表明，导入简单竞争指数自变量后的南方红豆杉冠幅、冠长和树冠率模型的判定系数明显高于与竞争无关的相应树冠形状模型，且当选南方红豆杉树冠形状优化模型。竞争对南方红豆杉冠幅、冠长生长有着显著的抑制作用，竞争对南方红豆杉冠形率有明显的促进作用，降低单木竞争指数可显著促进南方红豆杉冠幅、冠长生长。优选的南方红豆杉树冠形状模型均通过t检验，且偏差检验结果均较理想，可以用于生产中的树冠形状预测。
Abstract:
 Taking the Taxus chinensis var. mairei plantation in Mingxi County of Fujian Province as research object,the estimation mathematical models of crown shape were built by using the method of stepwise regression,in which a function taking individual tree size and individual tree competition index as variables,the crown width,crown length,crown shape rate and crown rate as dependent variables was involved,the optimal crown shape model was selected according to the decision coefficient of the mathematical model.T-test and deviation test were carried out on the optimal model of the T.chinensis var. mairei crown shape by using the test method of independent samples.The results showed that after introducing variables of simple competition index,the determination coefficients of crown width,crown length and crown rate models were significantly higher than those of competition-unrelated model,and those models were selected as the optimal crown shape models.Competition had significant inhibiting effects on the crown width,crown length growth and crown rate,but the competition had no significant effect on the crown shape rate.Those optimal crown shape models passed the t-test,and the deviation test results were satisfactory,which can be used to predict the crown shape in production.Reducing the simple competition index can significantly promote the crown width,crown length growth and crown rate of T.chinensis var. mairei.

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备注/Memo

备注/Memo:
 收稿日期：2019-11-29修回日期：2019-12-23
基金项目：国家小微企业双创城市示范项目（2017（72）号）；中央财政林业科技推广示范项目［标准化示范（2014）2号］。
作者简介：欧建德，教授级高工。研究方向；林木育种，森林培育、森林生态、森林经理。E-mail:smmxojd@163.com
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