三峡库区消落带香附子对水陆生境变化的响应  

Responds of Cyperus rotundus to flooding-drying habatate changes in Three Gorges Reservoir hydro-fuctuation belt

作　　者：洪明[1] 郭泉水[1] 聂必红 康义[1] 裴顺祥[3] 

机构地区：[1]中国林业科学研究院森林生态环境与保护研究所,国家林业局森林生态环境重点实验室,北京100091 [2]重庆市巫山县林业局,重庆巫山404700 [3]中国林业科学研究院华北林业实验中心,北京102300

出　　处：《河北农业大学学报》2011年第3期77-84,共8页Journal of Hebei Agricultural University

基　　金：十一五林业科技支撑计划课题(2006BAD03A313),十二五林业科技支撑计划(2011BAD38B04)

摘　　要：在三峡水库巫山段消落带植被建设试验示范区,按照海拔梯度设置监测样带,定位观测香附子的形态性状、种群密度及种群生物量变化,并揭示其对消落带水陆生境变化的生态适应性及形成机制,结果表明：消落带中浅水位区（海拔155~170 m）香附子的植株高度、叶片长度等均显著高于深水位区（海拔155 m以下）和未淹区（海拔170 m以上）;香附子植株高度、叶片长度的相对生长速率、根系长度、根系数量、块状茎分蘖植株数量、种群密度、种群生物量等总体呈现深水位区〉中浅水位区〉未淹区的变化趋势,表现出对消落带水陆生境变化超常的适应能力。香附子能够通过快速恢复生长,种群密度调节,地上与地下生物量分配调整等多种方式对消落带水陆不断变化的生境做出快速反应,这可能是香附子对消落带变化生境的一种生态适应对策。According to different elevation,we set located monitoring sample plots in vegetation construction experiment and demonstration area of Three gorges reservoir fluctuation zone in Wushan section to observe the ecological adapation and the formation machanism of Cyperus rotundus on morphological tiaits,population density and biomass to flooding-drying habatate changes.The results showed that,plant heignt,leaf length of Cyperus rotundus in the shallow water area（altitude 155-170 m） was significantly higher than in the deep water area（below altitude 155 m） and in the no flooded area（above altitude172 m）.Relative growth rate of plant height and leaf length,root length,root number,number of massive stem sprouted plants,population density and biomass showed a trend of in the deep water areain the shallow water areain the no flooded area,which indicated Cyperus rotundus had extraordinary ability to flooding-drying habatate changes.Rapid revoverry growth,population density adjustment,biomass allocation adjustment maybe the ecological adaption strategiey to flooding-drying habatate changes.

关 键 词：香附子 形态性状 种群密度 生物量 生态适应性 三峡库区消落带 

分 类 号：Q948.4[生物学—植物学]