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Nitrous oxide emission from soils after incorporating crop residues
Author(s) -
Baggs E.M.,
Rees R.M.,
Smith K.A.,
Vinten A.J.A.
Publication year - 2000
Publication title -
soil use and management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.709
H-Index - 81
eISSN - 1475-2743
pISSN - 0266-0032
DOI - 10.1111/j.1475-2743.2000.tb00179.x
Subject(s) - nitrous oxide , arable land , plough , crop residue , soil water , tillage , environmental science , agronomy , grassland , agriculture , crop , residue (chemistry) , human fertilization , chemistry , soil science , biology , ecology , biochemistry , organic chemistry
. Emissions of N 2 O were measured from different agricultural systems in SE Scotland. N 2 O emissions increased temporarily after fertilization of arable crops, cultivation of bare soil, ploughing up of grassland and incorporation of arable and horticultural crop residues, but the effect was short‐lived. Most of the emission occurred during the first two weeks, returning to ‘background’ levels after 30–40 days. The highest flux was from N‐rich lettuce residues, 1100 g N 2 O‐N ha −1 being emitted over the first 14 days after incorporation by rotary tillage. The magnitude and pattern of emissions was strongly influenced by rainfall, soil mineral N, cultivation technique and C∶N ratio of the residue. Comparatively large emissions were measured after incorporation of material with low C∶N ratios. Management practices are recommended that would increase N‐use efficiency and reduce N 2 O emissions from agricultural soils.