Effects of warming and nitrogen-addition on the growth of F1 generation of Solidago canadensis.
In order to address how simulated climate warming (2°C 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.e source, 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. N addition significantly promoted the accumulation of aboveground biomass, below ground biomass, and total biomass in S. canadensis, but this facilitation was 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.