Nitrous oxide emissions following application of residues and fertiliser under zero and conventional tillage

Elizabeth Baggs, M. Stevenson, M. Pihlatie, A. Regar, H. Cook, G. Cadisch

Research output: Contribution to journalArticle

215 Citations (Scopus)

Abstract

Emissions of N2O were measured following combined applications of inorganic N fertiliser and crop residues to a silt loam soil in S. E. England, UK. Effects of cultivation technique and residue application on N2O emissions were examined over 2 years. N2O emissions were increased in the presence of residues and were further increased where NH4NO3 fertiliser (200 kg N ha(-1)) was applied. Large fluxes of N2O were measured from the zero till treatments after residue and fertiliser application, with 2.5 kg N2O- N ha(-1) measured over the first 23 days after application of fertiliser in combination with rye ( Secale cereale) residues under zero tillage. CO2 emissions were larger in the zero till than in the conventional till treatments. A significant tillage/residue interaction was found. Highest emissions were measured from the conventionally tilled bean ( Vicia faba) (1.0 kg N2O- N ha(-1) emitted over 65 days) and zero tilled rye (3.5 kg N2O-N ha(-1) over 65 days) treatments. This was attributed to rapid release of N following incorporation of bean residues in the conventionally tilled treatments, and availability of readily degradable C from the rye in the presence of anaerobic conditions under the mulch in the zero tilled treatments. Measurement of N-15-N2O emission following application of N-15-labelled fertiliser to microplots indicated that surface mulching of residues in zero till treatments resulted in a greater proportion of fertiliser N being lost as N2O than with incorporation of residues. Combined applications of N-15 fertiliser and bean residues resulted in higher or lower emissions, depending on cultivation technique, when compared with the sum of N2O from single applications. Such interactions have important implications for mitigation of N2O from agricultural soils.

Original languageEnglish
Pages (from-to)361-370
Number of pages9
JournalPlant and Soil
Volume254
DOIs
Publication statusPublished - 2003

Keywords

  • combined residue and fertiliser application
  • conventional tillage
  • nitrous oxide
  • soil nitrogen
  • zero tillage
  • AGRICULTURAL SOILS
  • REDUCED TILLAGE
  • CROP RESIDUES
  • DENITRIFICATION
  • MINERALIZATION
  • DECOMPOSITION
  • POPULATIONS

Cite this

Nitrous oxide emissions following application of residues and fertiliser under zero and conventional tillage. / Baggs, Elizabeth; Stevenson, M.; Pihlatie, M.; Regar, A.; Cook, H.; Cadisch, G.

In: Plant and Soil, Vol. 254, 2003, p. 361-370.

Research output: Contribution to journalArticle

Baggs, Elizabeth ; Stevenson, M. ; Pihlatie, M. ; Regar, A. ; Cook, H. ; Cadisch, G. / Nitrous oxide emissions following application of residues and fertiliser under zero and conventional tillage. In: Plant and Soil. 2003 ; Vol. 254. pp. 361-370.
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T1 - Nitrous oxide emissions following application of residues and fertiliser under zero and conventional tillage

AU - Baggs, Elizabeth

AU - Stevenson, M.

AU - Pihlatie, M.

AU - Regar, A.

AU - Cook, H.

AU - Cadisch, G.

PY - 2003

Y1 - 2003

N2 - Emissions of N2O were measured following combined applications of inorganic N fertiliser and crop residues to a silt loam soil in S. E. England, UK. Effects of cultivation technique and residue application on N2O emissions were examined over 2 years. N2O emissions were increased in the presence of residues and were further increased where NH4NO3 fertiliser (200 kg N ha(-1)) was applied. Large fluxes of N2O were measured from the zero till treatments after residue and fertiliser application, with 2.5 kg N2O- N ha(-1) measured over the first 23 days after application of fertiliser in combination with rye ( Secale cereale) residues under zero tillage. CO2 emissions were larger in the zero till than in the conventional till treatments. A significant tillage/residue interaction was found. Highest emissions were measured from the conventionally tilled bean ( Vicia faba) (1.0 kg N2O- N ha(-1) emitted over 65 days) and zero tilled rye (3.5 kg N2O-N ha(-1) over 65 days) treatments. This was attributed to rapid release of N following incorporation of bean residues in the conventionally tilled treatments, and availability of readily degradable C from the rye in the presence of anaerobic conditions under the mulch in the zero tilled treatments. Measurement of N-15-N2O emission following application of N-15-labelled fertiliser to microplots indicated that surface mulching of residues in zero till treatments resulted in a greater proportion of fertiliser N being lost as N2O than with incorporation of residues. Combined applications of N-15 fertiliser and bean residues resulted in higher or lower emissions, depending on cultivation technique, when compared with the sum of N2O from single applications. Such interactions have important implications for mitigation of N2O from agricultural soils.

AB - Emissions of N2O were measured following combined applications of inorganic N fertiliser and crop residues to a silt loam soil in S. E. England, UK. Effects of cultivation technique and residue application on N2O emissions were examined over 2 years. N2O emissions were increased in the presence of residues and were further increased where NH4NO3 fertiliser (200 kg N ha(-1)) was applied. Large fluxes of N2O were measured from the zero till treatments after residue and fertiliser application, with 2.5 kg N2O- N ha(-1) measured over the first 23 days after application of fertiliser in combination with rye ( Secale cereale) residues under zero tillage. CO2 emissions were larger in the zero till than in the conventional till treatments. A significant tillage/residue interaction was found. Highest emissions were measured from the conventionally tilled bean ( Vicia faba) (1.0 kg N2O- N ha(-1) emitted over 65 days) and zero tilled rye (3.5 kg N2O-N ha(-1) over 65 days) treatments. This was attributed to rapid release of N following incorporation of bean residues in the conventionally tilled treatments, and availability of readily degradable C from the rye in the presence of anaerobic conditions under the mulch in the zero tilled treatments. Measurement of N-15-N2O emission following application of N-15-labelled fertiliser to microplots indicated that surface mulching of residues in zero till treatments resulted in a greater proportion of fertiliser N being lost as N2O than with incorporation of residues. Combined applications of N-15 fertiliser and bean residues resulted in higher or lower emissions, depending on cultivation technique, when compared with the sum of N2O from single applications. Such interactions have important implications for mitigation of N2O from agricultural soils.

KW - combined residue and fertiliser application

KW - conventional tillage

KW - nitrous oxide

KW - soil nitrogen

KW - zero tillage

KW - AGRICULTURAL SOILS

KW - REDUCED TILLAGE

KW - CROP RESIDUES

KW - DENITRIFICATION

KW - MINERALIZATION

KW - DECOMPOSITION

KW - POPULATIONS

U2 - 10.1023/A:1025593121839

DO - 10.1023/A:1025593121839

M3 - Article

VL - 254

SP - 361

EP - 370

JO - Plant and Soil

JF - Plant and Soil

SN - 0032-079X

ER -