摘要
应用Ｌｏｇｉｓｔｉｃ曲线方程模拟Ｉ—７２／５８、Ｉ—６９／５５、Ｉ—６３／５１三种杨树生长进程，把它们的生长进程划分为３个阶段，估测了它们的年生长速率最大点和速生期。经拟合验证，相关系数均达到０．９９以上。同时又用Ｖｅｒｈｕｌｓｔ模型建立树高值、胸径预测模型。
Using Logistic curve, growth processes of three kinds of poplar were simulated, and maximum points of annual growth rate and fast - growing stage were estimated. Each process could be divided into three phases. The correlation coefficients of height and diameter were 0. 9990 and 0. 9951 respectively when the growth models were fitted and tested with the original data of poplar No. 1-72/58. Also forecasting models of height and diameter for poplar No.I-72/58, No. I-69/55 and No. I--63/51 were set up by means of the Verhulst model.
出处
《西北林学院学报》
CSCD
1994年第2期82-86,共5页
Journal of Northwest Forestry University
关键词
杨树
生长
动态分析
poplar
growth
dynamic analysis
Logistic curve
forecasting model
