湖南农业大学学报（自然科学版）2017，Vol.43Issue(6)：604-609,6.DOI:10.13331/j.cnki.jhau.2017.06.005
不同情景增温对假臭草生长竞争的影响
Effect of simulated warming on growth and competition of Eupatorium catarium
摘要
Abstract
In order to investigate the growth characteristics and understand the survival strategies and invasiveness of invasive plant under the climate warming conditions, the invasive plant Eupatorium catarium was mixed cropping with its accompanying plant Lagedium sibiricum, three simulated warming patterns (increase 2℃in the daytime of 07:00-19:00, increase 2℃ in the nighttime of 19:00-07:00 and increase 2℃ in the daytime of 07:00-19:00 and in the nighttime of 19:00-07:00) were conducted and the plant height, root length, leaf number, module biomass and the interspecific competition of Eupatorium catarium were measured. The main results were as follows: the increasing of temperature had not only promoted the stem height and root length of Eupatorium catarium obviously, but also increased its leaf number and leaf area. Daily warming (07:00-19:00, 2 ℃) had the most effect on its growth and morphological features. When mixed with Lagedium sibiricum, the plant height, the total biomass, the relative yield, the total relative yield of Eupatorium catarium were much higher than those of the monoculture. The interspecific competitiveness of Eupatorium catarium was enhanced with the increasement of the mix ratio of Eupatorium catarium and Lagedium sibiricum, which showed a certain dependency to the the mix ratio. Under the condition of warming and normal temperature, the interspecific competitiveness of Eupatorium catarium with low mix ratio was less than zero and independent the environment. It manifested that Eupatorium catarium had strong morphological plasticity which affected the invasion ability, and might rapidly colonize and expansion by adapting climate warming environment.关键词
假臭草/山莴苣/增温/竞争/生物量分配Key words
Eupatorium catarium/Lagedium sibiricum/warming/competition/biomass allocation分类
农业科技引用本文复制引用
刘小文,齐成媚,曾丽亚,刘永昌,廖海兵,袁志辉,何福林,胡克坚..不同情景增温对假臭草生长竞争的影响[J].湖南农业大学学报（自然科学版）,2017,43(6):604-609,6.基金项目
国家自然科学基金项目(31601696) （31601696）
国家重点研发计划项目(2017YFD0201600) （2017YFD0201600）
湖南省重点研发计划项目(2017NK23601) （2017NK23601）
湖南省重点实验室开放基金(XNZW15C16) （XNZW15C16）
江西省持久性污染物控制与资源循环利用重点实验室开放基金项目(ES201780289) （ES201780289）
湖南科技学院科学研究项目(2015XKY007) （2015XKY007）
