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当前位置: 首页 > 文章 > 天然和人工种植胡杨植冠的构型分析 生态学杂志 2016,35 (1) 32-40
Position: Home > Articles > Architectural analysis of crown geometry of Populus euphratica in original and artificial habitats Chinese Journal of Ecology 2016,35 (1) 32-40

天然和人工种植胡杨植冠的构型分析

作  者：
于秀立;吕新华;刘红玲;李桂芳;庄丽
单  位：
石河子大学生命科学学院;石河子大学农学院;石河子大学师范学院
关键词：
枝系构型;天然胡杨;人工种植胡杨;准噶尔盆地南缘
摘  要：
研究准噶尔盆地南缘荒漠植物天然胡杨和人工种植胡杨的枝系构型特征,可为荒漠植物的生态适生性和进化机制及防风林的配置提供理论上的依据。本文研究了天然胡杨和人工种植胡杨的枝系构型特征值(分枝长度、分枝角度、枝径比和分枝率等),并对比研究了它们的构型差异,探究了荒漠植物形态-功能特性及其对生境的反应与适应机制。结果表明:植冠构型不同层次格局中,天然胡杨各级分枝长度和分枝角度从冠层顶部到基部均表现为逐渐变大的趋势,而人工种植胡杨各级分枝长度则表现为先增加再减小的趋势,且分枝角度表现为逐渐增大的趋势;各级分枝长度为人工种植胡杨<天然胡杨(P<0.05),从当年生到3级分枝长度为天然胡杨>人工种植胡杨,且它们枝条的伸展能力从第3级到当年生分枝呈现相对减弱的趋势;各分枝角为天然胡杨<人工种植胡,从当年生到第3级枝条分枝角呈现逐渐增加的趋势;各级枝径比为人工种植胡杨>天然胡杨(P<0.05),即人工种植胡杨枝条的承载能力显著高于天然胡杨;人工种植胡杨分枝率大于天然胡杨(P<0.05);人工种植胡杨的整体构型呈现为"半椭球"型,而天然胡杨的整体构型呈现为"金字塔"型。
译  名：
Architectural analysis of crown geometry of Populus euphratica in original and artificial habitats
作  者：
YU Xiu-li;LV Xin-hua;LIU Hong-ling;LI Gui-fang;ZHUANG Li;Agricultural College,Shihezi University;College of Life Science,Shihezi University;Normal College,Shihezi University;
关键词：
branch system configuration;;natural Populus euphratica;;planted Populus euphratica;;south edge of Junnger Basin
摘  要：
Studies on the branching architecture characteristics of Populus euphratica in original and artificial habitats at the south edge of Junnger Basin can better understand ecological adaptation and evolutionary mechanisms of desert plants and provide theoretical basis for windbreaks configuration. The plant architecture characteristics( branching length,branching angle,ratio of branch diameter,bifurcation ratio) of natural and planted P. euphratica were studied. At different levels of plant configuration,the branching length and branching angle of natural P. euphratica increased gradually from top to low canopy,while the branching length of planted P. euphratica firstly increased and then decreased,and the branching angle increased gradually. The branching length of planted P. euphratica at various levels was significantly lower than that of natural P. euphratica( P < 0. 05),and the bran-ching length from current-year branch to third class of natural P. euphratica was greater than that of planted P. euphratica. The branch stretching ability of natural and planted P. euphratica was weakened from third class to current-year branch. The branching angle of natural P. euphratica was lower than that of planted P. euphratica,and the branching angle from current-year branch to third class increased gradually. The ratio of branch diameter at various levels of planted P. euphratica was greater than that of natural P. euphratica,and the carrying capacity of the branches of planted P. euphratica was higher than that of natural P. euphratica( P< 0. 05). The bifurcation ratio in original habitat was greater than in artificial habitat( P < 0.05). As a whole,the architecture of planted P. euphratica exhibited a "half spheroid-ellipse"type,while natural P. euphratica was in "pyramid"type.

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