摘要
对陕北黄土区森林地带的侧柏种群结构和动态进行了探讨。结果表明：（１）侧柏种群是本区森林次生演替过程中的先锋乔木种群之一，在裸岩陡坡等特殊生境中亦能形成稳定的群落；（２）侧柏种群大小结构分初始增长型、增长型、稳定型、下降型、极度下降型、残留型及偏途顶极型等７种类型，并随演替的进行呈现由初始增长型过渡到残留型的变化；（３）侧柏种群密度随时间变化呈现负增长，且与乔木层盖度、侧柏种群年龄及土壤含水量呈显著负相关。
This paper deals with the structure and dynamics of Platycladus orientalis population at the forest area in loess plateau of northern Shaanxi Province. The results are as follows: 1. Platycladus orientalis is a pioneer species of the forest succession in this rigion. But the population at rocky steep slopes or ridges may develop into stationary community.2. The size structures are classified into seven types: initial growing;growing-stational;stational;declining;extremely declining;residual and disclimax types.3. The population density tends to decrease with the population and succession development,and ,has significant negative correlation with coverage of arbor layer,age of Platycladus orientalis population and moisture of soil.
出处
《武汉植物学研究》
CSCD
1995年第3期231-239,共9页
Journal of Wuhan Botanical Research
关键词
陕北黄土区
森林地带
侧柏
种群
Loess plateau of Northern Shaanxi Province, Forest area, Platycladus orientalis, Population
