Long-term nutrient addition increased CH₄ emission from a bog through direct and indirect effects.

ABSTRACT: Peatlands are globally significant sources of atmospheric methane (CH₄). While several studies have examined the effects of nutrient addition on CH₄ dynamics, there are few long-term peatland fertilization experiments, which are needed to understand the aggregated effects of nutrient deposition on ecosystem functioning. We investigated responses of CH₄ flux and production to long-term field treatments with three levels of N (1.6-6.4 g m^-2 yr^-1 as NH₄NO₃), potassium and phosphorus (PK, 5.0 g P and 6.3 g K m^-2 yr^-1 as KH₂PO₄), and NPK in a temperate bog. Methane fluxes were measured in the field from May to August in 2005 and 2015. In 2015 CH₄ flux was higher in

SUBMITTER: Juutinen S 

PROVIDER: S-EPMC5832806 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature