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Manure and Inorganic Nitrogen Affect Trace Gas Emissions under Semi-Arid Irrigated Corn
Manure and Inorganic Nitrogen Affect Trace Gas Emissions under Semi-Arid Irrigated Corn
- Source :
- Journal of Environmental Quality. 45:906-914
- Publication Year :
- 2016
- Publisher :
- Wiley, 2016.
-
Abstract
- Dairy manure is often applied to cropped soils as a substitute for inorganic N fertilizers, but the impacts of manure on soil trace gas fluxes, yields, and soil N are uncertain in the semiarid western United States. Soil carbon dioxide (CO-C), methane (CH-C), nitrous oxide (NO-N), and ammonia (NH-N) emissions were monitored using surface chambers from five N treatments: (i) partially composted solid dairy manure (DM) (412 kg N ha), (ii) DM + AgrotainPlus (DM+AP), (iii) enhanced efficiency N fertilizer (SuperU [SU]) (179 kg N ha), (iv) urea (179 kg N ha), and (v) check (no N applied), to determine their effect on growing season (GS) and nongrowing season emissions from a tilled clay loam soil under irrigated, continuous corn production for 3 yr. SuperU and AgrotainPlus contain urease and nitrification inhibitors. Averaged over years, GS soil CO-C emissions were greater for DM and DM+AP than for urea, SU, and check treatments due to the large amount of C added with the manure; CH-C emissions did not vary among N treatments; and NO-N emissions decreased in the order urea = DM = DM+AP > SU > check. AgrotainPlus added to the DM did not reduce NO-N emissions compared with DM. Cumulative NH-N emissions after manure application decreased in the order urea > SU > check, with no significant differences between SU, DM, and DM+AP. Dairy manure provided slow-release N with nitrate intensities lower than urea and NO-N emissions similar to urea. These results highlight the importance of best-management practices such as immediate irrigation after N application and use of urease and nitrification inhibitors to minimize N losses.
- Subjects :
- Environmental Engineering
Urease
Nitrogen
Nitrous Oxide
010501 environmental sciences
Management, Monitoring, Policy and Law
Zea mays
01 natural sciences
Soil
chemistry.chemical_compound
Fertilizers
Waste Management and Disposal
0105 earth and related environmental sciences
Water Science and Technology
Nitrates
biology
Soil chemistry
04 agricultural and veterinary sciences
Soil carbon
Pollution
Manure
Agronomy
chemistry
Loam
Soil water
040103 agronomy & agriculture
Urea
biology.protein
0401 agriculture, forestry, and fisheries
Nitrification
Subjects
Details
- ISSN :
- 00472425
- Volume :
- 45
- Database :
- OpenAIRE
- Journal :
- Journal of Environmental Quality
- Accession number :
- edsair.doi.dedup.....55aebdc4b6e1b1d613a656b933410ce9
- Full Text :
- https://doi.org/10.2134/jeq2015.08.0426