关键词: 生长和产量预测, 模型系统, 系统模型

Abstract:

In this paper, the five main factors, site index, stand age, stand density, habitat type, and stand structure, markedly influencing stand growth and yield, were described, specially about habitat type and stand structure. Some representative model systems of stand growth and yield prediction were introduced, classified as the three model systems, e.g. whole stand model systems, stand class model systems, and individual tree model systems. Some typical growth and mortality models were also introduced. Tree and stand are two different level ecosystems. Based on ecosystem attributes, such as integrality and simultaneous feature of systems, intercross correlation among components, and so on, systematizing models were proposed. The reality and precsion of stand growth and yield prediction models will be improved by establishing simultaneous equation system and by fitting its regression parameters with three-stage least-squares method.

Key words: Growth and yield prediction, Model system, Systematizing model