增温加氮对两种不同来源加拿大一枝黄花子一代生长的影响  

Effects of Warming and Nitrogen-addition on the Growth of F1 Generation of Solidago canadensis

作　　者：高苑苑 车路璐 彭培好[1] 李景吉[1] Gao Yuanyuan;Che Lulu;Peng Peihao;Li Jingji(Chengdu University of Technology,Chengdu 610059,P.R.China)

机构地区：[1]成都理工大学,成都610059

出　　处：《东北林业大学学报》2021年第8期51-55,共5页Journal of Northeast Forestry University

基　　金：国家自然科学青年科学基金项目(41501060)。

摘　　要：为探讨模拟气候变暖(增温2℃)和大气氮沉降(4 g·m^(-2)·a^(-1))对入侵植物子代生长的影响,以中国和北美两种来源的加拿大一枝黄花子一代为研究对象,研究了子一代幼苗的生长和生物量分配的响应。结果表明:(1)增温降低中国来源加拿大一枝黄花的地上生物量,但提高其根冠比,增温降低北美来源加拿大一枝黄花的根冠比;(2)与北美来源加拿大一枝黄花相比,加氮对中国来源加拿大一枝黄花叶片数、地下生物量和总生物量的促进作用更大;(3)加氮促进加拿大一枝黄花地上生物量、地下生物量和总生物量的积累,但增温减缓了这种促进作用。这些结果表明,气候变暖可能会部分抵消氮沉降对加拿大一枝黄花子一代幼苗生长的促进作用。In order to address how simulated climate warming(2℃above the ambient)and atmospheric N deposition(4 g·m^(-2)·a^(-1))influence the growth of offspring of invasive plants,we selected the F1 generation of Solidago canadensis from China and North America study the effects of three manipulations(i.esource,warming,and N addition)on their growth and root/shoot.Warming reduced the aboveground biomass of S.canadensis from China,and increased its root/shoot;warming reduced the root/shoot ratio of S.canadensis from North America.Compared to S.canadensis from North America,N addition had a stronger effect on the leaf number,belowground biomass,and total biomass of S.canadensis from China.Naddition significantly promoted the accumulation of aboveground biomass,below ground biomass,and total biomass in S.canadensis,but this facilitationwas mitigated by warming.These findings suggest that climate warming might alleviate the facilitative effect of N deposition on the seedling growth of the first generation of S.canadensis in the future.

关 键 词：子代幼苗生长 生物量 加拿大一枝黄花 气候变暖 氮沉降 

分 类 号：S682.1[农业科学—观赏园艺] Q945.3[农业科学—园艺学]