摘要
对林木生长规律的分析往往借助于数学方法给予定量化描述。灰色系统自70年代末以来已发展成为一门新兴学科。它已在国家经济建设决策方面取得突破性进展,正在受到国内外学术界的关注。在林业上对有关树种的产量预测(以灰色建模为基础)已开始应用。为了探讨灰色模型在揭示林木生长动态规律中适合程度及不同模型的表现,我们选用4个常用灰色模型,并取S型回归模型作为对照,这有利于将灰色系统方法引入林业研究中。现将结果报道如下。
The seedling dynamic procedures of growth of some tree species, such as Pinus massoniana, P. elliottii, P. taeda, Camellia oleifera, Aleurites montana,A.fordii have been modeled with grey model and Stype curve model. The results show that there are different dynamic models of growth in the seedling stage of different tree species. GM(1,1) and S type curve models have broad adaptability in modeling growth of trees in seedling stage. There are different results for height growth of different tree species when using GM(1,1) and S type curve models. GM(1,1) model is preferable to S type curve model in the modeling for the thick growth near ground. GM(2,1) and GM(1,N) can been used unwillingly for modeling some tree species. The modeling results by using Verhulst model are the worst of seedling modeling for all tree species with grey model and S type curve model.
出处
《林业科学研究》
CSCD
北大核心
1991年第2期211-216,共6页
Forest Research
