Modelling global annual N2O and NO emissions from fertilized fields

A.F. Bouwman, L.J.M. Boumans, N.H. Batjes

Research output: Contribution to journalArticleAcademicpeer-review

573 Citations (Scopus)

Abstract

Information from 846 N2O emission measurements in agricultural fields and 99 measurements for NO emissions was used to describe the influence of various factors regulating emissions from mineral soils in models for calculating global N2O and NO emissions. Only those factors having a significant influence on N2O and NO emissions were included in the models. For N2O these were (1) environmental factors (climate, soil organic C content, soil texture, drainage and soil pH); (2) management-related factors (N application rate per fertilizer type, type of crop, with major differences between grass, legumes and other annual crops); and (3) factors related to the measurements (length of measurement period and frequency of measurements). The most important controls on NO emission include the N application rate per fertilizer type, soil organic-C content and soil drainage. Calculated global annual N2O-N and NO-N emissions from fertilized agricultural fields amount to 2.8 and 1.6 Mtonne, respectively. The global mean fertilizer-induced emissions for N2O and NO amount to 0.9% and 0.7%, respectively, of the N applied. These overall results account for the spatial variability of the main N2O and NO emission controls on the landscape scale
Original languageEnglish
Pages (from-to)1080
Number of pages9
JournalGlobal Biogeochemical Cycles
Volume16
Issue number4
DOIs
Publication statusPublished - 2002

Keywords

  • nitrous-oxide emissions
  • agricultural soils
  • rice soil
  • inventory
  • fallow
  • budget
  • cycle

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