生态学杂志2025，Vol.44Issue(12)：3906-3914,9.DOI:10.13292/j.1000-4890.202512.038
磷添加对石漠化区飞机草与两种本地植物生长和竞争的影响
Effects of phosphorus addition on the growth and competition of Chromolaena odorata and two native spe-cies in rocky desertification area
摘要
Abstract
Phosphorus is a key resource influencing alien plant invasion.To investigate the effects of phosphorus addition on the invasion of Chromolaena odorata in karst rocky desertification area,we conducted a pot experiment to examine the growth and competitive responses of the invasive plant C.odorata and the native plants Eupatorium chinense and Vitex negundo under three phosphorus addition levels(0,50,and 100 mg·kg-1).The results showed that phosphorus addition significantly increased plant height and biomass in both C.odorata and E.chinense,but did not affect V.negundo.When grown in competition with E.chinense,C.odorata consistently dem-onstrated greater biomass across all treatments.Under high-phosphorus conditions,C.odorata exhibited significantly higher root mass ratio(RMR)and root-to-shoot ratio(R/S)than E.chinense.Moreover,its competitive indices-the relative interaction intensity(RII)and relative dominance index(RDI)showed significant increases.When grown in competition with V.negundo,plant biomass showed no significant differences between C.odorata and V.negundo across all phosphorus levels.Phosphorus addition did not affect growth parameters in either species.Both species exhibited negative RII values under all treatments.Furthermore,there was no difference in either RII(ex-cept low phosphorus treatment)or RDI between the two species.Phosphorus addition enhanced the competitive ad-vantage of C.odorata over E.chinense,but did not alter the competition between C.odorata and V.negundo.These findings demonstrate that phosphorus-mediated effects on invasion success depend critically on the identity of native competitor.This research provides novel insights into the mechanisms driving C.odorata invasion in rocky desertifi-cation areas and provides a scientific basis for developing management strategies.关键词
磷元素/竞争关系/飞机草/本地植物/外来入侵植物Key words
phosphorus/competitive relation/Chromolaena odoratum/native plant/alien invasive plant引用本文复制引用
潘玉梅,唐赛春,李象钦,韦春强,韦宇静,殷福临..磷添加对石漠化区飞机草与两种本地植物生长和竞争的影响[J].生态学杂志,2025,44(12):3906-3914,9.基金项目
广西自然科学基金项目(2023GXNSFAA026115)、国家自然科学基金项目(31960282)和广西植物研究所基本科研业务费项目(桂植业23010)资助. （2023GXNSFAA026115）
