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Tytuł pozycji:

Greenhouse gas emissions from dairy manure management in a Mediterranean environment.

Tytuł :
Greenhouse gas emissions from dairy manure management in a Mediterranean environment.
Autorzy :
Owen JJ; Department of Environmental Science, Policy & Management, University of California, Berkeley, California, 94720, USA.
Silver WL; Department of Environmental Science, Policy & Management, University of California, Berkeley, California, 94720, USA.
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Źródło :
Ecological applications : a publication of the Ecological Society of America [Ecol Appl] 2017 Mar; Vol. 27 (2), pp. 545-559. Date of Electronic Publication: 2017 Feb 22.
Typ publikacji :
Journal Article; Research Support, Non-U.S. Gov't
Język :
English
Imprint Name(s) :
Publication: Washington, D.C. : Ecological Society of America
Original Publication: Tempe, AZ : The Society, 1991-
MeSH Terms :
Dairying*
Greenhouse Gases/*analysis
Manure/*analysis
Waste Management/*methods
California ; Carbon/analysis ; Nitrogen/analysis
Contributed Indexing :
Keywords: Mediterranean*; agriculture*; climate change*; dairy*; emissions*; greenhouse gas*; livestock*; manure*; methane*; nitrous oxide*
Substance Nomenclature :
0 (Greenhouse Gases)
0 (Manure)
7440-44-0 (Carbon)
N762921K75 (Nitrogen)
Entry Date(s) :
Date Created: 20161119 Date Completed: 20190722 Latest Revision: 20190722
Update Code :
20210210
DOI :
10.1002/eap.1465
PMID :
27859918
Czasopismo naukowe
Livestock agriculture is a major source of anthropogenic greenhouse gas (GHG) emissions, with a substantial proportion of emissions derived from manure management. Accurate estimates of emissions related to management practices and climate are needed for identifying the best approaches to minimize, and potentially mitigate, GHG emissions. Current emissions models such as those of the IPCC, however, are based on emissions factors that have not been broadly tested against field-scale measurements, due to a lack of data. We used a diverse set of measurements over 22 months across a range of substrate conditions on a working dairy to determine patterns and controls on soil-based GHG fluxes. Although dairy soils and substrates differed by management unit, GHG fluxes were poorly predicted by these or climate variables. The manure pile had the greatest GHG emissions, and though temperature increased and O 2 concentration decreased following mixing, we detected almost no change in GHG fluxes due to mixing. Corral fluxes were characterized by hotspots and hot moments driven by patterns in deposition. Annual scraping kept the soil and accumulated manure pack thin, producing drier conditions, particularly in the warm dry season. Summed over area, corral fluxes had the greatest non-CO 2 global warming potential. The field had net CH 4 consumption, but CH 4 uptake was insufficient to offset N 2 O emissions on an area basis. All sites emitted N 2 O with a similar or greater climate impact than CH 4 . Our results highlight the importance of N 2 O emissions, a less commonly measured GHG, from manure management and present potential opportunities for GHG emissions reductions.
(© 2016 by the Ecological Society of America.)

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