Effects of daytime or night-time grazing on animal performance, diurnal behaviour and enteric methane emissions from dairy cows at high latitudes

Sammanfattning

This study compared animal performance and enteric methane (CH4) emissions from dairy cows in a part-time grazing (PTG) system in northern Sweden. Twenty-four Nordic Red dairy cows were allocated to one of two treatments: DAY (10 h daytime pasture access) or NIGHT (12 h night-time pasture access). The cows in each treatment received the same ad libitum partial mixed ration (PMR) indoors and ad libitum herbage allowance. Methane was recorded using two linked GreenFeedTM emissions monitoring (GEM) units, on pasture and indoors. Day or night grazing showed no statistical differences in estimated grass or PMR intake, milk production or daily enteric CH4 emissions. There was a rapid decrease in diurnal CH4 emissions (28%) when the cows were moved from indoors to pasture in both grazing treatments. Using two GEM units (indoor, outdoor) in combination improved the diurnal assessment of enteric CH4 emissions during PTG conditions in the mixed feeding system.

Nyckelord

Part-time grazing; access time; mixed ration; behaviour; pasture; intake; diurnal pattern

Publicerad i

Acta Agriculturae Scandinavica, Section A - Animal Science
2024, Volym: 73, nummer: 1-2, sidor: 28-42
Utgivare: TAYLOR AND FRANCIS AS

SLU författare

• Lardy, Quentin

  • Institutionen för tillämpad husdjursvetenskap och välfärd, Sveriges lantbruksuniversitet
    
  • Norsk Institutt for Biookonomi (NIBIO)

• Ramin, Mohammad

  • Institutionen för tillämpad husdjursvetenskap och välfärd, Sveriges lantbruksuniversitet
    

• Hetta, Mårten

  • Institutionen för tillämpad husdjursvetenskap och välfärd, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Husdjursvetenskap


Publikationens identifierare

DOI: https://doi.org/10.1080/09064702.2023.2249907

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/123769