摘要
对不同密度4年生大叶相思Acacia auriculiformis林分的竞争指数进行研究,以便为合理管理和利用大叶相思人工林提供理论依据。结果表明,随着密度的降低,大叶相思林的各器官竞争指数呈减小趋势。在同一密度条件下,地上竞争指数明显大于地下竞争指数。由于地下生长与地上生长的相互作用,各竞争指数之间具有明显的相关性。通径分析表明,地上竞争对总竞争的直接作用明显大于地下竞争对总竞争的直接作用。
The competition index was studied in Acacia auriculiformis stands with different densitiesto provide theory basis for rational utilization and management of the stands. The results showed thatcompetition index of all the organs in the A. auriculiformis stands tended to decrease with decreasingdensity. At the same density level, competition index of above-ground was greater than that ofbelow-ground. Significant correlation was found among below-ground, above-ground, and totalcompetition. Coefficients of path analysis, in three densities levels, indicated that the direct influenceintensity of above-ground competition on total competition was greater than below-ground competition.
作者
列志旸
许松葵
薛立
LIE Zhi-yang;XU Song-kui;XUE Li(College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, Guangdong China)
出处
《亚热带植物科学》
2016年第2期127-130,共4页
Subtropical Plant Science
基金
广东省林业厅项目"林分改造优良乡土阔叶树种筛选"(粤财农2015-159号)
关键词
大叶相思
竞争密度
相关分析
通径分析
Acacia auriculiformis
competition density
correlation analysis
path analysis
