Nitrogen (N) deposition has increased globally and has profoundly influenced the structure
and function of grasslands. Previous studies have discussed how N addition affects
aboveground biomass (AGB), but the effects of N addition on the AGB of different functional
groups in grasslands remain unclear. We conducted a meta-analysis to identify the
responses of AGB and the AGB of grasses (AGBgrass) and forbs (AGBforb) to N addition
across global grasslands. Our results showed that N addition significantly increased AGB …