N₂O fluxes in soils of contrasting textures fertilized with liquid and solid dairy cattle manures

Abstract

N. 2008. N 2 O fluxes in soils of contrasting textures fertilized with liquid and solid dairy cattle manures. Can. J. Soil Sci. 88: 175Á187. Manure is known to increase soil N 2 O emissions by stimulating nitrification and denitrification processes. Our objective was to compare soil-surface N 2 O emissions following the application of liquid and solid dairy cattle manures to a loamy and a clay soil cropped to silage maize. Manures were applied in 2 consecutive years at rates equivalent to 150 kg total N ha(1 and compared with a control treatment receiving an equivalent rate of synthetic N. Soil-surface N 2 O fluxes, soil temperature, and soil water, nitrate and ammonium contents were monitored weekly in manured and control plots. From 60 to 90% of seasonal N 2 O emissions occurred during the first 40 d following manure and synthetic fertilizer applications, indicating that outside that period one or several factors limited N 2 O emissions. The period of higher emissions following manure and fertilizer application corresponded with the period when soil mineral N contents were highest (up to 17 g NO 3 ( -N m

A novel and effective technology for mitigating nitrous oxide emissions from land-applied manures

“…Nitrous oxide emissions steadily decreased over the 2-month gas emission measurement period, which accords well with emission trends for land-applied manures reported in the literature (Lessard et al 1996;Chadwick et al 2000;Sherlock et al 2002;Ginting et al 2003;Amon et al 2006;Rochette et al 2008).…”

Green waste compost reduces nitrous oxide emissions from feedlot manure applied to soil

“…This confirms the findings of Akiyama et al (2004), who found that N 2 O emission rate increased with increasing moisture, up to 80% WFPS. Similarly, Rochette et al (2008) observed increase in N 2 O emission rates when both NO 3 -N concentration and WFPS were high in soil.…”

Long-term effects of cropping system on N2O emission potential

“…Within arable agriculture, short-term N 2 O emissions are stimulated by manure and fertilizer application (Röver et al, 1998;Rochette et al, 2008;Chantigny et al, 2010) and residue incorporation (Aulakh et al, 1991;Petersen et al, 2011). However, a significant part of annual N 2 O emissions may not derive from recent amendments, but from soil organic matter (SOM) turnover, and occur partly outside the main growing season, for example after rainfall or, in mid-latitude regions, in connection with freezing and thawing cycles (Sexstone et al, 1985;Teepe et al, 2001;Matzner and Borken, 2008).…”