冀北山地山杨林胸径生长规律研究  

Study on the growth pattern of DBH of Populus davidiana forest in mountain regions in northern Hebei

作　　者：尤立权 陈继东[1] 黄选瑞[2] 李校[1] 许中旗[2] 

机构地区：[1]河北省木兰围场国有林场管理局,河北围场068400 [2]河北农业大学林学院,河北保定071000

出　　处：《河北林果研究》2013年第1期35-37,40,共4页Hebei Journal of Forestry and Orchard Research

基　　金：国家"十二五"科技支撑计划项目(2012BAD22B0304);河北省科技厅科技支撑项目(10236728)

摘　　要：以山杨为研究对象,在调查山杨胸径生长过程的基础上,探究了冀北山地山杨林的生长规律。结果表明:抛物线方程拟合其立木株数生长过程随年龄变化效果最好,对数方程拟合其胸径生长过程效果最好。山杨天然次生林中,50年生的胸径总生长量为13.3cm,年平均生长量0.27cm/年。胸径连年生长量和平均生长量5年生达到高峰,为0.80cm/年。该地区山杨天然次生林林分生长高峰到来早,中后期生长速度慢,总生长量较低,需要进行合理经营。In this paper, aspen（Populus davidiana） startds were used as the research materi- als to study their growth patterns based on the investigation of aspen tree DBH growth process in the mountainous regions of northern Hebei province. Results showed that the par- abolic equation fitted the stem number growth process best, logarithmic equation fitted the DBH growth best. For the 50 year-old natural secondary aspen stands, the total DBH in- crease was 13.3 cm, the average annual growth rate was 0.27cm. DBH volume and average growth rate reached the peak at the age of five years with the figure of 0.80 cm/a. The aspen stands in this reached growth peak early, but slowed down in stand growth in the following middle and late periods featured with low total biomass increase. Therefore, the natural sec- ondary aspen stands here need to be managed rationally.

关 键 词：山杨 胸径 生长规律 

分 类 号：S758[农业科学—森林经理学]