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短轮伐期桉树林分树冠生长的阶跃函数模型(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2006年02期
Page:
59-62
Column:
研究论文
publishdate:
2006-02-20

Article Info:/Info

Title:
The Unit Step Function Model for Crown Diameter of Short Rotation Eucalyptus
Article ID:
1000-2006(2006)02-0059-04
Author(s):
ZHOU Yuan-man1 XIE Zheng-sheng2 LIU Su-qing1 LIU Xin-tian1
1. Agronomy College Guangdong Ocean University, Zhanjiang 524088, China; 2. Forest College South China Agriculture University, Guangzhou, 510642, China
Keywords:
Eucalyptus Unit step function Crown Growth curve Short rotation
Classification number :
S753.5
DOI:
10.3969/j.jssn.1000-2006.2006.02.014
Document Code:
A
Abstract:
According to the crown growth characteristics in industrial Eucalyptus stand of short rotation, the unit step function model was put forward for the process with changing point of short rotation Eucalyptus clones U6 based on the survey practical stands. The biology signification of the parameter of the model was analyzed by solving the coefficient. The analyzable conclusions of the regression model between crown diameter and age show that the utility of unit step function model in the crown growth process with the changing point is better than the usual regression methods, and the unit step function model can solve discontinuance on the changing point. The optimizing model results show that the power model is the best one in all models tested.

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Last Update: 2013-05-20