Nitrous oxide and methane emissions following application of animal manures to grassland

Journal Article · Tue Feb 01 04:00:00 EST 2000 · Journal of Environmental Quality

DOI:https://doi.org/10.2134/jeq2000.00472425002900010035x· OSTI ID:20075833

Chadwick, D R; Pain, B F; Brookman, S K.E.

Nitrous oxide (N{sub 2}O) and methane (CH{sub 4}) emissions were measured from grassland following manure applications at three times of the year. Pig (Sus scrofa) slurry and dairy cow (Bos taurus) slurry were applied in April, at equal rates of ammoniacal-N (NH{sub 4}{sup +}-N), and in July, at equal volumetric rates (50 m{sup 3}ha{sup {minus}1}). In October, five manure types were applied to grassland plots at typical application rates: pig slurry, dilute diary cow effluent, pig farm yard manure (FYM), beef FYM and layer manure. Emissions were measured for 20, 22, and 24 d, respectively. In April, greater cumulative emissions of N{sub 2}O-N were measured following application of dairy cow slurry (1.51 kg ha{sup {minus}1}) than pig slurry (90.77 kg ha{sup {minus}1}). Cumulative CH{sub 4} emissions following application in April were significantly greater from the dairy cow slurry treatment (0.58 kg ha{sup {minus}1}) than the pig slurry treatment (0.13 kg ha{sup {minus}1}) (P < 0.05). In July, significantly greater N{sub 2}O-N emissions resulted from pig slurry-treated plots (0.57 kg ha{sup {minus}1}) than dairy cow slurry-treated plots (0.34 kg ha{sup {minus}1}). Cumulative net CH{sub 4} emissions were very low following July applications (<10 g ha{sup {minus}1}). In October, the lowest N{sub 2}O-N emission resulted from application of dilute dairy effluent, 0.15 kg ha{sup {minus}1}, with the greatest net emission from the application of pig slurry, 0.74 kg ha{sup {minus}1}. Methane emissions were greatest from the plots that received pig FYM, resulting in a mean cumulative net emission of 2.39 kg ha{sup {minus}1}.

• Research Organization: Inst. of Grassland and Environmental Research, North Wyke, Okehampton, Devon (GB)
• OSTI ID: 20075833
• Journal Information: Journal of Environmental Quality, Journal Name: Journal of Environmental Quality Journal Issue: 1 Vol. 29; ISSN JEVQAA; ISSN 0047-2425
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
AGRICULTURAL WASTES
EMISSION
ENVIRONMENTAL IMPACTS
GROUND DISPOSAL
MANURES
METHANE
NITROUS OXIDE
SOILS
WASTE MANAGEMENT
WASTE PRODUCT UTILIZATION