Greenhouse gas emissions from a wheat-maize double cropping system with different nitrogen fertilization regimes

X.K. Hu, F. Su, X.T. Ju, B. Gao, O. Oenema, P. Christie, B.X. Huang, R.F. Jiang, F.S. Zhang

Research output: Contribution to journalArticleAcademicpeer-review

173 Citations (Scopus)

Abstract

Here, we report on a two-years field experiment aimed at the quantification of the emissions of nitrous oxide (N2O) and methane (CH4) from the dominant wheat maize double cropping system in North China Plain. The experiment had 6 different fertilization strategies, including a control treatment, recommended fertilization, with and without straw and manure applications, and nitrification inhibitor and slow release urea. Application of N fertilizer slightly decreased CH4 uptake by soil. Direct N2O emissions derived from recommended urea application was 0.39% of the annual urea-N input. Both straw and manure had relatively low N2O emissions factors. Slow release urea had a relatively high emission factor. Addition of nitrification inhibitor reduced N2O emission by 55%. We conclude that use of nitrification inhibitors is a promising strategy for N2O mitigation for the intensive wheat maize double cropping systems. (C) 2013 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)198-207
JournalEnvironmental Pollution
Volume176
DOIs
Publication statusPublished - 2013

Keywords

  • north china plain
  • 3,4-dimethylpyrazole phosphate dmpp
  • temperate forest soils
  • oxide emissions
  • agricultural soils
  • n2o emissions
  • nitrification inhibitor
  • field experiments
  • calcareous soil
  • organic-carbon

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