Low-disturbance manure incorporation effects on ammonia and nitrate loss

Journal of Environmental Quality
C J DellD Beegle

Abstract

Low-disturbance manure application methods can provide the benefits of manure incorporation, including reducing ammonia (NH3) emissions, in production systems where tillage is not possible. However, incorporation can exacerbate nitrate (NO3⁻) leaching. We sought to assess the trade-offs in NH3 and NO3⁻ losses caused by alternative manure application methods. Dairy slurry (2006-2007) and liquid swine manure (2008-2009) were applied to no-till corn by (i) shallow (<10 cm) disk injection, (ii) surface banding with soil aeration, (iii) broadcasting, and (iv) broadcasting with tillage incorporation. Ammonia emissions were monitored for 72 h after application using ventilated chambers and passive diffusion samplers, and NO3⁻ leaching to 80 cm was monitored with buried column lysimeters. The greatest NH3 emissions occurred with broadcasting (35-63 kg NH3-N ha⁻), and the lowest emissions were from unamended soil (<1 kg NH-N ha⁻¹). Injection decreased NH-N emissions by 91 to 99% compared with broadcasting and resulted in lower emissions than tillage incorporation 1 h after broadcasting. Ammonia-nitrogen emissions from banding manure with aeration were inconsistent between years, averaging 0 to 71% that of broadcasting. Annual NO3⁻ leach...Continue Reading

References

Aug 15, 2002·Journal of Environmental Quality·R B Thompson, J J Meisinger
Jun 18, 2003·Journal of Environmental Quality·Martin N HansenNiels P Madsen
Apr 28, 2011·Journal of Environmental Quality·J M PowellT H Misselbrook

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Citations

Oct 30, 2016·Journal of Environmental Management·M G Mostofa AminMette Laegdsmand
Apr 12, 2016·Journal of Environmental Quality·Chris PrattMaren Westermann
Oct 4, 2016·Journal of Environmental Quality·William JokelaJason Cavadini
Feb 9, 2017·Journal of Environmental Quality·E W DuncanD B Beegle
Jan 21, 2015·Journal of Environmental Quality·C Alan RotzRichard H Grant

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