| 小叶杨生长规律的研究 |
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| 引用本文： | 张连翔,梅秀艳,姜镇荣. 小叶杨生长规律的研究[J]. 防护林科技, 2001, 0(2): 10-12,33 |
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| 作者姓名： | 张连翔 梅秀艳 姜镇荣 |
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| 作者单位： | 辽宁省干旱地区造林研究所, |
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| 摘 要： | 应用Logistic模型和有序样品聚类法对小叶杨的生长规律进行了定量研究 ,将胸径和树高2个表现生长过程科学地划分为前慢期、速生期和后慢期 3个阶段 ,实现了胸径和树高二维有序样品的聚类 ,不仅反映出小叶杨生长的综合节奏性 ,更为龄组划分提供了依据 ,此外 ,本文还以Logis tic模型为基础 ,以时间因子为媒介 ,推导出一个能准确地描述小叶杨D -H关系的新模型———Lo gistic衍生模型
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| 关 键 词： | 小叶杨 生长规律 Logistic模型 有序样品聚类 Logistic衍生模型 |
| 文章编号： | 1005-5212(2001)02-0010-03 |
STUDY ON GROWTH LAW OF POPULUS SIMONII CARR |
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| ZGANG Liam-xiang,MEI Xiu-yan,JIANG Zhen-rong. STUDY ON GROWTH LAW OF POPULUS SIMONII CARR[J]. Protection Forest Science and Technology, 2001, 0(2): 10-12,33 |
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| Authors: | ZGANG Liam-xiang MEI Xiu-yan JIANG Zhen-rong |
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| Abstract: | In this paper,quantitative study of growth law of Populus simonii Carr.,was carried out using logistic model and ordered sample cluster.Growths of breast diameter and tree height were divided into 3 periods—first slow,fast growing and latter slow.Taking the logistic model as a basis,time as mediator,a new derived model was obtained,which can accurately describe D-H relation of Populus simonii Carr.This study is valuable for raising intensive production level of Populus simonii and science and technology contents. |
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| Keywords: | Populus simonii Carr. growth law Logistic model ordered sample cluster Logistic derived model |
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