摘要
一、问题的提出及意义吉良龙夫(1953)发现草本植物的密度与生长存在明显的数量关系。林学家们以林木为对象进行了研究。安藤贵、尹泰龙等做了进一步推导,编制了林分密度控制图。由于密度控制图编制简便、应用广泛,因此,广泛编制几乎包括我国所有主要用材树种,并对数学模型及编制方法做了有益的探讨,但仍存在明显不足,且繁杂。我们认为,这些编制方法正确性及准确程度。
M=a_1H_t^(b_1c_1) and M=a_2D^(b_2)N^(c_2). are regarded as the binary mathematical models for the equiheight line and equidiameter line respectively, and M = a_3D^(b_2)H^(c_2)N^(d_2) as the cubic mathematical model for the complex equiheight-equidiameter line, which can fully reflect the relation among stand density and amount of volume and its changing rule precisely. It is proved that the bases and method for drawing up the models are significant widely.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1992年第3期282-286,共5页
Scientia Silvae Sinicae
关键词
等树高线
等直径线
最大密度线
Equiheight line
Equidiameter line
Methematical model
The maximum density line
Plots in order
