摘要
本文用聚集度指标(C;I;1_δ;x~*和C_A等)及x~*-x,log S^2-log x的回归等测定方法研究了毛竹在杉木与毛竹的混交林中的空间分布型。研究结果表明,在总体上毛竹的空间分布型是呈聚集分布图式(α>0,β=1);分布的基本成份是个体群(α>0);个体群的分布近似随机的(β=1)。根据Iwao的x~*与x的回归方程,得出不同立竹度和允许误差下的抽样面积。如毛竹密度为1000株/公顷,应抽取0.124公顷的样地,其精确度才达到90％。
This paper presents the distribution pattern of bamboo in mixed forest of Chinese fir-bamboo using aggregate indices (c, I, I_δ, x~*, C_A) and the methods of Iwao's (x~*-x) regression and Taylor's (log s^2-1og x) regression. The results showed that the distribution pattern of bamboo was an aggregated pattern in population (α>0, β=1), and the basic component of distribution was proved to be 'individual group' (α>0), which approached to be random distribution (β=1). According to Iwao's(x~*-x) regression equation, the theoretical sampling area of forest survey was analysed and calculated under different stocking percent of bamboo and allowing error.
出处
《竹子研究汇刊》
北大核心
1990年第2期56-64,共9页
Journal of Bamboo Research
关键词
空间分布
毛竹
聚集度指标
distribution pattern
bamboo
aggregate index
