Fertilization practices and soil variations control nitrogen oxide emissions from tropical sugar cane

P. A. Matson, C. Billow, Sharon Hall, J. Zachariassen

Research output: Contribution to journalArticle

88 Citations (Scopus)

Abstract

Nitrogen (N) fertilization of agricultural systems is thought to be a major source of the increase in atmospheric N2O; NO emissions from soils have also been shown to increase due to N fertilization. While N fertilizer use is increasing rapidly in the developing world and in the tropics, nearly all of our information on gas emissions is derived from studies of temperate zone agriculture. Using chambers, we measured fluxes of N2O and NO following urea fertilization in tropical sugar cane systems growing on several soil types in the Hawaiian Islands, United States. On the island of Maui, where urea is applied in irrigation lines and soils are mollisols and inceptisols, N2O fluxes were elevated for a week or less after fertilization; maximum average fluxes were typically less than 30 ng cm-2 h-1. NO fluxes were often an order of magnitude less than N2O. Together, N2O and NO represented from 0.03 to 0.5% of the applied N. In fields on the island of Hawaii, where urea is broadcast on the surface and soils are andisols, N2O fluxes were similar in magnitude to Maui but remained elevated for much longer periods after fertilization. NO emissions were 2-5 times higher than N2O through most of the sampling periods. Together the gas losses represented approximately 1.1-2.5% of the applied N. Laboratory studies indicate that denitrification is a critical source of N2O in Maui, but that nitrification is more important in Hawaii. Experimental studies suggest that differences in the pattern of N2O/NO and the processes producing them are a result of both carbon availability and placement of fertilizer and that the more information-intensive fertilizer management practice results in lower emissions.

Original languageEnglish (US)
Pages (from-to)18533-18545
Number of pages13
JournalJournal of Geophysical Research: Atmospheres
Volume101
Issue number13
StatePublished - Aug 20 1996
Externally publishedYes

Fingerprint

sugar cane
Sugar cane
fertilization
nitrogen oxides
soils
Nitric Oxide
fertilizers
Fluxes
urea
Fertilizers
Soils
ureas
fertilizer
Urea
soil
Andisol
Mollisol
Inceptisol
Tropics
irrigation

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Atmospheric Science
  • Astronomy and Astrophysics
  • Oceanography
  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Fertilization practices and soil variations control nitrogen oxide emissions from tropical sugar cane. / Matson, P. A.; Billow, C.; Hall, Sharon; Zachariassen, J.

In: Journal of Geophysical Research: Atmospheres, Vol. 101, No. 13, 20.08.1996, p. 18533-18545.

Research output: Contribution to journalArticle

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