Claim · model-written summary
In-season split nitrogen did not significantly change area-scaled nitrous oxide emissions in any year versus pre-season nitrogen.
- Treatment
- in-season split N applicatione0
- Outcome
- area- or yield-scaled N2O emissionse0
- Comparator
- pre-seasone0
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shifting from pre-season to in-season split N application did not significantly affect area- or yield-scaled N2O emissions in any year”
t0“rainfed maize”
Title
Giovani Preza-Fontes; Laura E. Christianson; Kristin Greer; et al. Agriculture Ecosystems & Environment 2021. doi:10.1016/j.agee.2021.107813
Other claims from this paper (7)
- Intervention effect In-season split nitrogen did not significantly change yield-scaled nitrous oxide emissions in any year versus pre-season nitrogen.
- Observation The in-season nitrogen plus cereal rye treatment produced high nitrous oxide spikes after side-dress nitrogen in all years.
- Observation Those spikes did not produce consistently higher cumulative nitrous oxide emissions.
- Intervention effect In-season nitrogen plus cereal rye increased area-scaled nitrous oxide emissions by about 50% in one of three years relative to both nitrogen-only treatments.
- Intervention effect In-season nitrogen plus cereal rye increased yield-scaled nitrous oxide emissions by about 50% in one of three years relative to both nitrogen-only treatments.
- Mechanism The authors suggest that high soil nitrogen, warm wet soil and cover crop decomposition contribute to elevated nitrous oxide emissions.
- Recommendation The authors recommend assessing both nitrous oxide emissions and crop yield when evaluating these conservation practices.