三倍体毛白杨生长量数学模型建立及验证

Establishment and Verification of Growth Mathematical Model of Triploid Populus Tomentosa

为了探索三倍体毛白杨生长节律和预测生长趋势,通过对汉中市林研所院内18年生三倍体毛白杨标准木各生长量的解析,并运用线性和非线性回归分析对比,初步建立了幼林期材积、胸径、树高生长量的最佳数学模型。结果表明,最佳材积总生长量数学模型为:v=0009a^(2.318),最佳胸径总生长量数学模型为:D=-0.0186a^2+1.9145a+0.1943,最佳树高总生长量数学模型为:H=2.9392a^(0.7459)。研究结果为预测三倍体毛白杨的生长趋势提供科学依据。

In order to study the growth rules and to predict growth tendency of triploid Populus Tomentosa, the optimal growth mathematical models based on timber volume, diameter at breast height and tree height were established using linear and nonlinear regression analysis on growth of 18-year -old triploid Populus Tomentosa sample trees located in Forestry Institute of Hanzhong. The results showed that the optimal total growth mathematical models were v=0009a^2.318 for timber volume, D= -0.0186a^2＋1. 9145a＋0. 1943 for diameter at breast height and ： H=2. 9392a^0.7459 for tree height, which provided a scientific basis for predicting growth of triploid Populus Tomentosa.