Large nitrous oxide emissions from arable soils after crop harvests prior to sowing.

ABSTRACT: Global agriculture is the largest anthropogenic source for nitrous oxide (N₂O) emissions. During crop rotations, periods with arable soils without crops, thereafter called "bare soils" are often impossible to avoid after the crop is harvested, prior to sowing of the next crop. However, such periods are underrepresented in studies focussing on N₂O emissions. Here, we present continuous, high-temporal-resolution N₂O fluxes during bare soil periods after four major crops, using the eddy-covariance technique at two sites in Switzerland. Overall, periods with bare soil were net sources for N₂O as well as for carbon dioxide (CO₂) and methane (CH₄). Daily average sums of N₂O emissions varied between 10 ± 2 and 38 ± 5 g N

SUBMITTER: Maier R 

PROVIDER: S-EPMC11950146 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature