现代设计立木和林木的生长模型,其特点是广泛地应用数学方法和电子计算机。不同的作者曾经提出过多种形式的生长函数,但为此目的至今还没有一个被普遍采用的分析表达式;而有的则完全是凭经验获得的,很难对其参数给予详细的说明。 The modern model for the growth of standing trees and trees is characterized by the extensive application of mathematical methods and electronic computers. Different authors have proposed various forms of growth functions, but so far no analytical expression has been universally adopted for this purpose; while others are derived empirically and it is difficult to give detailed descriptions of their parameters.