Realistic rates of nitrogen addition increase carbon flux rates but do not change soil carbon stocks in a temperate grassland.

ABSTRACT: Changes in the biosphere carbon (C) sink are of utmost importance given rising atmospheric CO₂ levels. Concurrent global changes, such as increasing nitrogen (N) deposition, are affecting how much C can be stored in terrestrial ecosystems. Understanding the extent of these impacts will help in predicting the fate of the biosphere C sink. However, most N addition experiments add N in rates that greatly exceed ambient rates of N deposition, making inference from current knowledge difficult. Here, we leveraged data from a 13-year N addition gradient experiment with addition rates spanning realistic rates of N deposition (0, 1, 5, and 10 g N m^-2  year^-1 ) to assess the rates of N addition at which C uptake and storage were stimulated in a temperate grassland. V

SUBMITTER: Wilcots ME 

PROVIDER: S-EPMC9545222 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature