Format

Send to

Choose Destination
See comment in PubMed Commons below
J Dairy Sci. 2012 Jun;95(6):3181-9. doi: 10.3168/jds.2011-4606.

Variation among individual dairy cows in methane measurements made on farm during milking.

Author information

1
The University of Nottingham, School of Biosciences, Sutton Bonington Campus, Loughborough LE12 5RD, UK. Phil.Garnsworthy@nottingham.ac.uk

Abstract

The objective of this study was to quantify on-farm variation between and within cows in methane emissions measured during milking, and to determine which factors are related to this variation. Methane emission rate during milking (MERm) was recorded at milking using methane analyzers installed in automatic (robotic) milking stations for 215 cows over a period of 5 mo. Between-cow variation in MERm (mean 2.07, SD 0.629 g/min), was greater than within-cow variation and was related to variation in body weight, milk yield, parity, and week of lactation. Estimation of daily methane emissions from MERm data, using an equation derived from comparisons with respiration chamber data, produced estimates that ranged from 278 to 456 g of CH₄/d and were commensurate with values predicted from metabolizable energy requirements for observed body weight and milk yield. It is concluded that methane emissions vary considerably between dairy cows housed under commercial conditions. This variation needs to be taken into account when performing inventories or testing mitigation strategies, but it might offer opportunities for genetic selection.

PMID:
22612953
DOI:
10.3168/jds.2011-4606
[Indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center