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Nitrous oxide emission from permanent grass swards
Author(s) -
Webster Colin P.,
Dowdell Rodney J.
Publication year - 1982
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740330304
Subject(s) - nitrous oxide , loam , lysimeter , soil water , agronomy , irrigation , environmental science , nitrogen , silt , nitrate , chemistry , zoology , soil science , geology , biology , paleontology , organic chemistry
Emissions of nitrous oxide from permanent grass swards growing on monoliths of clay (Salop series) or silt loam (Bromyard series) soils contained in lysimeters (80 cm diameter, 135 cm deep), were measured between October 1977 and August 1980. With no added fertiliser nitrous oxide emissions were small (equivalent to 10–30 μg N m −2 h −1 ), but after application of nitrate fertiliser (400 kg N ha −1 year −1 ) during the spring and summer months, emissions increased to peak values ca 1000 μg N m −2 h −1 . The peaks were associated with nitrogen applications and rainfall/irrigation events, but persisted only for 3–7 days. Nitrous oxide production in the soil was mostly restricted to the upper 30 cm of the soil profile. Total annual nitrous oxide losses amounted to 6–8 kg N ha −1 from the Salop clay soil and 4–6 kg N ha −1 from the Bromyard silt loam.