摘要
分析青海云杉的胸径、胸高断面积、树高、材积、形数5个主要生长指标而进行连年生长模型的研究,结果表明:青海云杉生长到30年和80年,其树高生长量有显著的变化;同时可建立树高与胸径生长数学模型,通过对生长模型的建立和分析,可正确地反映林木生长的动态,在林业生产实践中具有一定的应用价值。
Analyze normal diameter, normal area ,height, volume ,shape that are five main growth indexes of picea crassifolia and research the model of growth in a year. The result shows that growth of picea crassifolia in 30 or 80 years old are significantly different, and set up a model between height and normal diameter .Through for establish and analysis of the growth modal ,the dynamic state of forest growth is rightly estimated and there are some application value in forest planting.
出处
《河西学院学报》
2003年第5期83-86,共4页
Journal of Hexi University
关键词
青海
云杉
生长指标
林业
祁连山
picea crassifolia
model of growth
QiLian mountains
