Exploring variability in methods and data sensitivity in carbon footprints of feed ingredients

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MARC

van Middelaar, Corina EverardaWageningen University, The Netherlands (author)

Exploring variability in methods and data sensitivity in carbon footprints of feed ingredients

Article/chapterEnglish2013

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2012-10-30
Springer Science and Business Media LLC,2013
printrdacarrier

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LIBRIS-ID:oai:DiVA.org:ri-8742
https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-8742URI
https://doi.org/10.1007/s11367-012-0521-9DOI
https://research.chalmers.se/publication/195520URI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

Purpose: Production of feed is an important contributor to life cycle greenhouse gas emissions, or carbon footprints (CFPs), of livestock products. Consequences of methodological choices and data sensitivity on CFPs of feed ingredients were explored to improve comparison and interpretation of CFP studies. Methods and data for emissions from cultivation and processing, land use (LU), and land use change (LUC) were analyzed. Method: For six ingredients (maize, wheat, palm kernel expeller, rapeseed meal, soybean meal, and beet pulp), CFPs resulting from a single change in methods and data were compared with a reference CFP, i.e., based on IPCC Tier 1 methods, and data from literature. Results and discussion: Results show that using more detailed methods to compute N2O emissions from cultivation hardly affected reference CFPs, except for methods to determine leaching (contributing to indirect N2O emissions) in which the influence is about -7 to +12 %. Overall, CFPs appeared most sensitive to changes in crop yield and applied synthetic fertilizer N. The inclusion of LULUC emissions can change CFPs considerably, i.e., up to 877 %. The level of LUC emissions per feed ingredient highly depends on the method chosen, as well as on assumptions on area of LUC, C stock levels (mainly aboveground C and soil C), and amortization period. Conclusions: We concluded that variability in methods and data can significantly affect CFPs of feed ingredients and hence CFPs of livestock products. Transparency in methods and data is therefore required. For harmonization, focus should be on methods to calculate leaching and emissions from LULUC. It is important to consider LUC in CFP studies of food, feed, and bioenergy products.

Subject headings and genre

LANTBRUKSVETENSKAPER Lantbruksvetenskap, skogsbruk och fiske Livsmedelsvetenskap hsv//swe
AGRICULTURAL SCIENCES Agriculture, Forestry and Fisheries Food Science hsv//eng
NATURVETENSKAP Geovetenskap och miljövetenskap hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences hsv//eng
LANTBRUKSVETENSKAPER Annan lantbruksvetenskap hsv//swe
AGRICULTURAL SCIENCES Other Agricultural Sciences hsv//eng
Food Engineering
Carbon footprint
Feed ingredients
Feed production
Inventory data
Livestock products
Methods
Livsmedelsteknik

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Cederberg, Christel,1959RISE,SIK – Institutet för livsmedel och bioteknik(Swepub:cth)chrced (author)
Vellinga, Th V.Wageningen UR Livestock Research, The Netherlands (author)
Van Der Werf, Hayo M. G.INRA, France; Agrocampus Ouest, France (author)
De Boer, Imke J. M.Wageningen University, The Netherlands (author)
Wageningen University, The NetherlandsSIK – Institutet för livsmedel och bioteknik (creator_code:org_t)

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In:The International Journal of Life Cycle Assessment: Springer Science and Business Media LLC18:4, s. 768-7820948-33491614-7502

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