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Position: Home > Articles > A Mathematical Model for the Diameter Growth of 9-year-old Tectona grandis Journal of West China Forestry Science 2018 (6) 45-49

9年生柚木干径生长规律及其数学模型

作  者：
石文革;许党;李军;张荣贵
单  位：
云南省红河州林业科学研究所
关键词：
柚木;干径解析;生长量;逻辑斯蒂模型
摘  要：
应用逻辑斯蒂(Logistic)生长模型,对9年生柚木干径解析及生长回归分析,以了解幼龄柚木干径生长规律,结果表明:幼龄柚木生长过程可以用逻辑斯蒂模型方程y=115. 751 3/(1+e~(2. 186 1-0.543 688x))来定量描述和预估生长趋势; 9年生柚木仍处于快速生长期,9年干径达到112. 67mm,干径平均年生长量12. 52mm/a,第2年进入快速生长期,第4年生长达到高峰18. 26mm/a,进入速生期早、生长快,是一种速生的热带珍贵树种; 9年生柚木南半轴生长显著高于其它3个半轴,东、西两半轴生长曲线一致,基本重合。南、北两个半轴在前3年生长一致,从第4年后两者差距逐渐拉大。干径年生长量总体呈下降趋势,但各年差异较大,生长量变化曲线呈波浪状。
译  名：
A Mathematical Model for the Diameter Growth of 9-year-old Tectona grandis
作  者：
SHI Wen-ge;XU Dang;LI Jun;ZHANG Rong-gui;Forestry Research Institute of Honghe Prefecture;
单  位：
SHI Wen-ge%XU Dang%LI Jun%ZHANG Rong-gui%Forestry Research Institute of Honghe Prefecture
关键词：
Tectona grandis;;diameter analysis;;growth volume;;Logistic model
摘  要：
Through the application of Logistic growth model,the analysis of diameter growth and regression analysis of 9-year-old teak showed that the growth process could be described and predicted by Logistic model equation:y = 115. 751 3/( 1 + e~(2. 186 1-0. 543 7 x)),and the 9-years-old teak was still in rapid growth,the diameter reached112. 67 mm,the average annual growth of diameter was 12. 52 mm/a. Tectona grandis entered the rapid growth period in the second years,and reached the peak of growth 18. 26 mm/a in the fourth year. The growth of the south half axis of 9-years-old Tectona grandis was significantly higher than that of the other three half axises,and the growth curve of the east and west half axises are consistent and basically superpositions. The half axis of South and North grow in the same way in the first 3 years,but the difference between them gradually increasing from the fourth years. The annual growth of diameter growth volume generally showed a downward tendency. The growth volumecurve showed a wavy line.

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