摘要
用常规方法对山东半岛赤松次生林天然更新状况进行了为期４年的观测研究。运用电子计算机对原始数据进行了通径分析程序运算。结果表明，林分郁闷度、灌草层总盖度对赤松更新幼树数量的影响最大，二者都以直接效应为主，是影响赤松次生林天然更新最重要的因子。坡度与土层厚度代表地形和土壤条件；对赤松更新幼树的数量的影响小于郁闲度和群落总盖度，二者主要通过影响其它因子而间接作用于赤松次生林的天然更新。赤松林木密度与赤松更新幼树数量的关系不密切，对赤松次生林天然更新的作用较小。赤松林地一般无裸岩，故裸岩面积所占百分比对赤松地树数量的作用不显著。通径分析能够表明变量之间作用的因果关系，更深刻地揭示变量之间的关系。
The natural regeneration of the forest in Shandong peninsula was measured using a routine method from 1990 to 1994 and the original data was analyzed with method of Path Analysis using computer. The results show that the effects of crown density and the percentage vegetation cover on the sapling quantity were the largest. Both were the most important among the six factors affecting the regeneration. The forest regeneration was indirectly affected by slope and soil thickness, which represent topography and soil fertility of the forest, to a smaller extent as compared to the two factors mentioned above. The forest tree density was not significantly related to the sapling quantity and influenced the regeneration to a small extent. Bare rock percentage had little importance in multiplication of saplings because there were not many bare rocks in the forests, in general. Path Analysis could uncover the causality in interaction among variables, thus more could reveal the further relationship among variables.
出处
《植物生态学报》
CAS
CSCD
北大核心
1996年第4期348-354,共7页
Chinese Journal of Plant Ecology
关键词
赤松
赤松次生林
天然更新
幼树数量
通径分析
Secondary forest of Japanese red pine, Natural regeneration, Sapling quantity, Path Analysis
