摘要
本文在对享有“蜀南竹海”之称的长宁县楠竹林分进行全面调查的基础上,运用多元统计分析方法,把与楠竹林分生长有密切相关的立地因子、林分結构因子和生产力重要值(SI_w)、新竹(1—3度)株数、秆材重量等能全面反映楠竹生长的生产力指标进行了数量化分析。借助电子计算机进行方程参数求解,编制出了楠竹林分立地、林分结构因子三个生产力指标数量化查定表。同时,对楠竹林分立地质量进行了数量评价,用主导因子逐级控制综合分类方法将四川长宁县楠竹林分划分出七个立地类型。另外,文中还首次提出了生产力重要值概念,并确定了该值的求算方法。
Based on the overall surveying to the phyllostachys pubescens stands famous for 'Shunan Bamboo Forest sea' in Changhing county, Sichuan Province, China, author analysed quantatively the following productivity indexes that Correlated closely, echoed and weighted comprehensively the growth Condition of Ph. pubescens by method of the multivariate statistical analysis: site factor, Structure factor of stands, importance value of productivity, number of new Culm (2—6 ages) and weigh of culm timber Parameter equation was resolved by computer, the quantative table of the productivity indexes consisting of the site and Structure factor of the Ph. pubescens stands was determined and compiled Meanwhile, the site of the stands was evaluted quantatively, and divided into 7 site-types by multistage classification controlled important factors. In addition, the concept about importance value of productivity was presented for the first time, and the method of calculating it was stipulated, too.
出处
《竹子研究汇刊》
北大核心
1991年第3期49-60,共12页
Journal of Bamboo Research
关键词
毛竹
林分
立地质量
立地类型
Phyllostachys pubescens stands
Importance Ualue of productwity
Site quality
Site type
