Improved isotopic model based on ¹⁵ N tracing and Rayleigh-type isotope fractionation for simulating differential sources of N₂ O emissions in a clay grassland soil.

ABSTRACT:

Rationale

Isotopic signatures of N₂ O can help distinguish between two sources (fertiliser N or endogenous soil N) of N₂ O emissions. The contribution of each source to N₂ O emissions after N-application is difficult to determine. Here, isotopologue signatures of emitted N₂ O are used in an improved isotopic model based on Rayleigh-type equations.

Methods

The effects of a partial (33% of surface area, treatment 1c) or total (100% of surface area, treatment 3c) dispersal of N and C on gaseous emissions from denitrification were measured in a laboratory incubation system (DENIS) allowing simultaneous measurements of NO, N₂ O, N₂ and CO₂ over a 12-day incubation period. To determine the source of N

SUBMITTER: Castellano-Hinojosa A 

PROVIDER: S-EPMC6492082 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature