PMID- 26486922
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20151021
LR  - 20201001
IS  - 2076-2615 (Print)
IS  - 2076-2615 (Electronic)
IS  - 2076-2615 (Linking)
VI  - 2
IP  - 2
DP  - 2012 Jun 8
TI  - Methane Emission and Milk Production of Dairy Cows Grazing Pastures Rich in 
      Legumes or Rich in Grasses in Uruguay.
PG  - 288-300
LID - 10.3390/ani2020288 [doi]
AB  - Understanding the impact of changing pasture composition on reducing emissions of 
      GHGs in dairy grazing systems is an important issue to mitigate climate change. 
      The aim of this study was to estimate daily CH(4) emissions of dairy cows grazing 
      two mixed pastures with contrasting composition of grasses and legumes: L pasture 
      with 60% legumes on Dry Matter (DM) basis and G pasture with 75% grasses on DM 
      basis. Milk production and CH(4) emissions were compared over two periods of two 
      weeks during spring using eight lactating Holstein cows in a 2 x 2 Latin square 
      design. Herbage organic matter intake (HOMI) was estimated by chromic oxide 
      dilution and herbage organic matter digestibility (OMD) was estimated by faecal 
      index. Methane emission was estimated by using the sulfur hexafluoride (SF6) 
      tracer technique adapted to collect breath samples over 5-day periods. OMD (0.71) 
      and HOMI (15.7 kg OM) were not affected by pasture composition. Milk production 
      (20.3 kg/d), milk fat yield (742 g/d) and milk protein yield (667 g/d) were 
      similar for both pastures. This may be explained by the high herbage allowance 
      (30 kg DM above 5 cm/cow) which allowed the cows to graze selectively, in 
      particular in grass sward. Similarly, methane emission expressed as absolute 
      value (368 g/d or 516 L/d) or expressed as methane yield (6.6% of Gross Energy 
      Intake (GEI)) was not affected by treatments. In conclusion, at high herbage 
      allowance, the quality of the diet selected by grazing cows did not differ 
      between pastures rich in legumes or rich in grasses, and therefore there was no 
      effect on milk or methane production.
FAU - Dini, Yoana
AU  - Dini Y
AD  - Facultad de Agronomia, Universidad de la Republica, Av. Garzon 780, Montevideo 
      12900, Uruguay. yoad@fagro.edu.uy.
FAU - Gere, Jose
AU  - Gere J
AD  - IFAS, Facultad de Ciencias Exactas, UNCPBA, CONICET, Pinto 399, Tandil 7000, 
      Argentina. jgere@exa.unicen.edu.ar.
FAU - Briano, Carolina
AU  - Briano C
AD  - Facultad de Agronomia, Universidad de la Republica, Av. Garzon 780, Montevideo 
      12900, Uruguay. caro_briano@yahoo.com.ar.
FAU - Manetti, Martin
AU  - Manetti M
AD  - INFQC, Universidad de Cordoba, CONICET, Av. Haya de la Torre s/n, Ciudad 
      Universitaria, Cordoba 5000, Argentina. mmanetti@fcq.unc.edu.ar.
FAU - Juliarena, Paula
AU  - Juliarena P
AD  - IFAS, Facultad de Ciencias Exactas, UNCPBA, CONICET, Pinto 399, Tandil 7000, 
      Argentina. pjuliarena@exa.unicen.edu.ar.
FAU - Picasso, Valentin
AU  - Picasso V
AD  - Facultad de Agronomia, Universidad de la Republica, Av. Garzon 780, Montevideo 
      12900, Uruguay. vpicasso@fagro.edu.uy.
FAU - Gratton, Roberto
AU  - Gratton R
AD  - IFAS, Facultad de Ciencias Exactas, UNCPBA, CONICET, Pinto 399, Tandil 7000, 
      Argentina. rgratton@rec.unicen.edu.ar.
FAU - Astigarraga, Laura
AU  - Astigarraga L
AD  - Facultad de Agronomia, Universidad de la Republica, Av. Garzon 780, Montevideo 
      12900, Uruguay. astigarr@fagro.edu.uy.
LA  - eng
PT  - Journal Article
DEP - 20120608
PL  - Switzerland
TA  - Animals (Basel)
JT  - Animals : an open access journal from MDPI
JID - 101635614
PMC - PMC4494323
OTO - NOTNLM
OT  - SF6
OT  - dairy cows
OT  - digestibility
OT  - grazing
OT  - intake
OT  - methane
EDAT- 2012/01/01 00:00
MHDA- 2012/01/01 00:01
PMCR- 2012/06/08
CRDT- 2015/10/22 06:00
PHST- 2012/05/09 00:00 [received]
PHST- 2012/05/31 00:00 [revised]
PHST- 2012/06/06 00:00 [accepted]
PHST- 2015/10/22 06:00 [entrez]
PHST- 2012/01/01 00:00 [pubmed]
PHST- 2012/01/01 00:01 [medline]
PHST- 2012/06/08 00:00 [pmc-release]
AID - ani2020288 [pii]
AID - animals-02-00288 [pii]
AID - 10.3390/ani2020288 [doi]
PST - epublish
SO  - Animals (Basel). 2012 Jun 8;2(2):288-300. doi: 10.3390/ani2020288.