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Methane production in dairy cows

individual cow variability in methane production

Cabezas Garcia, Edward Hernando (2017). Methane production in dairy cows. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2017:43
ISBN 978-91-576-8859-0
eISBN 978-91-576-8860-6
[Doctoral thesis]

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Abstract

Enteric methane (CH4) emissions vary between individual cows, and this variation is attributed to both animal and dietary factors. In addition, measurement technique of in vivo CH4 emissions from individual animals still represents a major challenge for successful emissions mitigation strategies. This thesis investigated the contribution of different factors to between-animal variation in CH4 production, in order to improve the current knowledge of its biological basis. In a study comparing on-farm systems for measuring CH4 emissions from large numbers of animals and the variation between individual animals, the GreenFeed system was used as the normal set-up (flux method) or modified to mimic gas analysers systems based on CH4 concentrations (sniffer system) to measure CH4 emissions. Measurements taken by the GreenFeed system proved be more reliable than those made by the simulated sniffer method. The GreenFeed data were consistent with literature values determined in respiration chambers, while the sniffer method were poorly correlated to flux method values and were not significantly related to either feed intake or milk yield. Despite GreenFeed being a spot sampling method, it proved to be a promising tool for ranking cows as high and low CH4 emitters. A meta-analysis based on an individual cow dataset investigating the effects of between-cow variation and related animal variables on predicted CH4 emissions from dairy cows. Between-cow variation in fermentation pattern are not likely be the major factor influencing predicted in vivo CH4 emissions. Variation and repeatability for volatile fatty acid concentrations were greater for ruminal concentrations than molar proportions, indicating strong control by the individual cow. Digestion kinetics variables were more repeatable than rumen fermentation or microbial synthesis, as a result of variations in passage rate. In studies in which late-cut silage and rolled barley were gradually replaced with early-cut silage in the diet of dairy cows, production responses and in vivo CH4 emissions were studied in 16 intact lactating cows and possible physiological mechanisms were assessed in four rumen-cannulated cows. Improvements in forage quality by graded addition of early-cut silage was an effective strategy to reduce concentrate supplementation, without compromising performance or increasing CH4 emissions in lactating dairy cows. Differences in intake between treatments were partly compensated by differences in silage digestibility.

Authors/Creators:Cabezas Garcia, Edward Hernando
Title:Methane production in dairy cows
Subtitle:individual cow variability in methane production
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :2017
Depositing date:2017
Volume:2017:43
Number of Pages:94
Papers/manuscripts:
NumberReferences
IHuhtanen, P., E. H. Cabezas-Garcia, S. Utsumi, and S. Zimmerman (2015). Comparison of methods to determine methane emissions from dairy cows in farm conditions. Journal of Dairy Science 98, 3394–3409.
IICabezas-Garcia, E. H., S. J. Krizsan, K. J. Shingfield, and P. Huhtanen. (2017). Between-cow variation in digestion and rumen fermentation variables associated with methane production. Journal of Dairy Science 100, 1–16 (In Press).
IIICabezas-Garcia, E. H., S. J. Krizsan, K. J. Shingfield, and P. Huhtanen. (2017). Effects of replacement of late-harvested grass silage and barley with early-harvested silage on milk production and methane emissions. Journal of Dairy Science (In Press).
IVCabezas-Garcia, E. H., S. J. Krizsan, K. J. Shingfield, X. Dai, and P. Huhtanen. (2017). Effects of replacement of late-harvested grass silage and barley with early-harvested silage on ruminal digestion efficiency in dairy cows (Manuscript).
Place of Publication:Uppsala
Publisher:Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-576-8859-0
ISBN for electronic version:978-91-576-8860-6
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L02 Animal feeding
L Animal production > L51 Animal physiology - Nutrition
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 402 Animal and Dairy Science > Animal and Dairy Science.
Agrovoc terms:dairy cows, methane emissions, yields, animal feeding, digestion, individuals, methods
Keywords:dairy cattle, methane yield, between-cow variation, repeatability
URN:NBN:urn:nbn:se:slu:epsilon-e-4094
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4094
ID Code:14234
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(NL, NJ) > Dept. of Agricultural Research for Northern Sweden
(VH) > Dept. of Agricultural Research for Northern Sweden
Deposited By: Edward Hernando Cabezas Garcia
Deposited On:11 Apr 2017 10:52
Metadata Last Modified:11 Apr 2017 10:52

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