Canopy and understory nitrogen addition have different effects on fine root dynamics in a temperate forest: implications for soil carbon storage

Elucidating the effects of atmospheric nitrogen (N) deposition on fine root dynamics and potential underlying mechanisms is required to understand changes in belowground aboveground carbon storage. However, research these forests has mostly involved direct understory addition N ignored canopy interception processing N. Here, we conducted a field experiment comparing (CAN) with those (UAN) at three N-addition rates (0, 25 50 kg ha–1 yr–1) temperate deciduous forest. Fine production biomass were significantly higher CAN than UAN. At same rate, increases least two-fold greater high rate relative control, was increased by (by 23.5%) but decreased UAN 12.2%). Our results indicate that traditional may underestimate responses forest ecosystems. Canopy processes should be considered for more realistic assessments forests.