外来入侵杂草田菁的构件生物量分配与异速生长分析  

Biomass Partitioning in Modules and Allometric Growth of Alien Invasive Weed Sesbania cannabina

作　　者：邓美菁 张忠华 莫秋丽 胡聪 徐超昊 胡刚 DENG Mei-jing;ZHANG Zhong-hua;MO Qiu-li;HU Cong;XU Chao-hao;HU Gang(School of Environmental and Life Sciences,Nanning Normal University,Nanning 530100,China)

机构地区：[1]南宁师范大学环境与生命科学学院,广西南宁530100

出　　处：《杂草学报》2023年第1期35-42,共8页Journal of Weed Science

基　　金：广西自然科学基金(编号:2021GXNSFFA196005、2021GXNSFAA196024);国家自然科学基金(编号:31960275、31760128)。

摘　　要：田菁(Sesbania cannabina)是我国华南、华中和华东等地区危害严重的外来入侵杂草,通过测定其构件(根、茎、叶、花、果)生物量和植株高度等数据,分析其构件生物量分配特征及其与异速生长的关系,以期掌握该入侵杂草的生长发育规律。结果表明:田菁的构件生物量分配关系表现为茎>叶>果>根>花,而其变异系数从大到小为果>茎>叶>根>花,其地上与地下以及生殖与营养构件间的生物量均表现出极显著的差异性。此外,田菁各构件之间以及株高与构件间均为异速生长关系,株高与各构件生物量间呈极显著正相关性。田菁种群各构件间的异速生长关系以及较高的地上构件生物量与其较强的入侵性有密切联系,该结果对评估田菁的入侵机制具有重要价值。Sesbania cannabina is a serious alien invasive weed in South China,Central China and East China.This study measured the data such as biomass partitioning in modules(root,stem,leaf,flower and fruit)and plant height,analyzed the characteristics of biomass partitioning in modules and its relationship with allometric growth so as to understand the regulation of growth and development of this alien invasion weed.Results showed that biomass partitioning in modules presented with stem>leaf>fruit>root>flower,and their coefficients of variation were fruit>stem>leaf>root>flower.Meanwhile,there were very significant difference between biomass partitioning in reproductive and nutritional modules or aboveground and underground modules(P<0.01).In addition,all the biomass partitioning in modules were the allometric growth relationships,so were they and plant heightwith highly significant positive correlation(P<0.01).Allometric growth and higher biomass in underground modules of S.cannabina were closely related to its strong invasiveness.The results was of great value to evaluate the invasion mechanism of S.cannabina.

关 键 词：田菁 外来入侵杂草 构件生物量分配 异速生长 

分 类 号：Q944[生物学—植物学] S451[农业科学—植物保护]