摘要
采用正交试验设计在秦岭太白山设置了12个太白红杉林分,用样方方法对太白红杉种群进行了调查,用正交分析法和"DataProcessingSystem"数据处理软件对影响太白红杉林分布的5个生态因子进行了分析。结果表明:5个生态因子中,海拔梯度的变化是影响太白红杉林分布的主导因子,5个生态因子在影响太白红杉林分布中的作用地位是:海拔>坡度>土壤厚度>坡向>风向。并对描述太白红杉林的5个指标进行了主成分分析,并对高山林线进行了定量描述,胸高直径是描述太白红杉林的主要成分,海拔3400m是太白山太白红杉郁闭林的上限。
At Taibai Qinling Mountain 12 Larix chinensis population stands were set up using the idea of the Orthogon experimental design.Stands were investigated by sampling method.5 ecological factors influencing forest's distribution were analyzed by Orthogon analytic approach and 'Data Processing System' data processing software.The results showed that the change of the altitude gradient is the leading factor influencing the forest's distribution of Larix chinensis and their function position in affecting the distribution of Larix chinensis forest is the altitude>slope gradient>soil thickness>slope aspect>wind direction.This paper also analyzed the 5 index in describing Larix chinensis forest and quantificationally described the alpine timberline at Taibai Mountain.The breast-height diameter is a main composition of describing the forest of Larix chinensis,3 400 m altitude is the upper limit of the closing Larix chinensis forest of Taibai Mountain.
出处
《西北植物学报》
CAS
CSCD
北大核心
2005年第5期968-972,共5页
Acta Botanica Boreali-Occidentalia Sinica
基金
教育部留学回国人员科研项目启动基金"秦岭太白山林线森林更新与气候变化耦合规律的研究"(2003-2004)
关键词
太白红杉
正交分析
生态因子
主成分
高山林线
Larix chinensis
Orthogon analysis
ecological factor
main composition
alpine timberline
