西藏昌都地区川西云杉林木生长规律研究  

Growth Regularity of Picea likiangensis var.balfouriana in Changdu of Tibet

作　　者：白文斌[1] 廖超英[2] 康乐[1] 张晓芳[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨陵712100 [2]西北农林科技大学资源环境学院,陕西杨陵712100

出　　处：《西北林学院学报》2012年第5期158-162,共5页Journal of Northwest Forestry University

基　　金：国家自然科学基金项目(30670339)

摘　　要：以昌都地区川西云杉解析木资料为基础进行回归分析,确定川西云杉林木胸径、树高、材积的最优生长模型,用样地调查实测数据验证模型预测精度,并绘制胸径、树高、材积连年生长量和平均生长量曲线,对其生长过程进行分析。结果表明,最优模型能够很好的反映其生长规律。树龄<25a时,即幼龄林时期川西云杉的生长速率相对较快;25a后胸径、树高及材积的生长相对稳定,但仍维持了较高生长速率。其胸径的连年生长量在第30年生长最快,平均生长量在第45年最高;树高连年生长量和平均生长量的最高点一般比胸径相应的推迟20a。从材积生长规律上来看,川西云杉的平均和连年生长量仍有上升的趋势。鉴于其数量成熟龄出现较晚,在生产经营中应适时的采取间伐抚育,以保证林分的最大生产力。The growth regularities of DBH, height and volume of Picea lileiangensis var. balfouriana growing in Changdu, Tibet, China, were investigated to provide references for predicting its growth could fit the growth process precisely. The growth rate was relatively high when the trees were less than 25 years old. After that, the growth of DBH, height and volume remained relatively stabile, but also within the range of high growth rate. The current annual increment of DBH increased apparently at the year of 30, and reached at its highest point at 45. The highest values of current annual increment and aver- age increment of the height growth were approximately 20 years later than that of DBH growth. Among the growth regularities of volume, the average increment and current annual increment still exhibited a ris- ing trend. In the view of its late quantitative maturity, it was suggested that thinning measures should be implemented in order to enhance the net primary productivity of the Picea likiangensis forest.

关 键 词：川西云杉 生长分析 生长模型 西藏昌都 成熟龄 

分 类 号：S791.180.6[农业科学—林木遗传育种]