Enteric methane emissions from low– and high–residual feed intake beef heifers measured using GreenFeed and respiration chamber techniques

2017 ◽  
Vol 95 (8) ◽  
pp. 3727 ◽  
Author(s):  
A. W. Alemu ◽  
D. Vyas ◽  
G. Manafiazar ◽  
J. A. Basarab ◽  
K. A. Beauchemin
Keyword(s):  
Feed Intake ◽  
Residual Feed Intake ◽  
Methane Emissions ◽  
Beef Heifers ◽  
Respiration Chamber ◽  
Enteric Methane ◽  
Enteric Methane Emissions

The impact of breeding to reduce residual feed intake on enteric methane emissions from the Australian beef industry

2006 ◽  
Vol 46 (7) ◽  
pp. 813 ◽  
Author(s):  
A. R. Alford ◽  
R. S. Hegarty ◽  
P. F. Parnell ◽  
O. J. Cacho ◽  
R. M. Herd ◽  
...  
Keyword(s):  
Gene Flow ◽  
Feed Intake ◽  
Residual Feed Intake ◽  
Methane Emissions ◽  
Beef Industry ◽  
Enteric Methane ◽  
Beef Herd ◽  
The Individual ◽  
The Impact ◽  
Enteric Methane Emissions

The expected reduction in methane emissions from the Australian beef herd resulting from using bulls identified as being more feed efficient as a result of having a lower residual feed intake (RFI) was modelled, both in a single herd in southern Australia and in the national herd. A gene flow model was developed to simulate the spread of improved RFI genes through a breeding herd over 25 years, from 2002 to 2026. Based on the estimated gene flow, the voluntary feed intakes were revised annually for all beef classes using livestock populations taken from the Australian National Greenhouse Gas Inventory (NGGI). Changes in emissions (kg methane/animal.year) associated with the reduction in feed intake were then calculated using NGGI procedures. Annual enteric methane emissions from both the individual and national herd were calculated by multiplying the livestock numbers in each beef class by the revised estimates of emissions per animal. For an individual adopting herd, the annual methane abatement in year 25 of selection was 15.9% lower than in year 1. For the national herd, differential lags and limits to adoption were assumed for northern and southern Australia. The cumulative reduction in national emissions was 568 100 t of methane over 25 years, with annual emissions in year 25 being 3.1% lower than in year 1. It is concluded that selection for reduced RFI will lead to substantial and lasting methane abatement, largely as a consequence of its implementation as a breeding objective for the grazing beef herd.

79 Comparison of enteric methane emissions between Holstein heifers and steers using respiration chamber data

2021 ◽  
Vol 12 (1) ◽  
pp. 58
Author(s):  
Xianjiang Chen ◽  
Christopher Reynolds ◽  
Les Crompton ◽  
Huiru Zheng ◽  
Haiying Wang ◽  
...  
Keyword(s):  
Methane Emissions ◽  
Respiration Chamber ◽  
Enteric Methane ◽  
Enteric Methane Emissions

The effects of fresh forages and feed intake level on digesta kinetics and enteric methane emissions from sheep

2014 ◽  
Vol 193 ◽  
pp. 32-43 ◽  
Author(s):  
K.J. Hammond ◽  
D. Pacheco ◽  
J.L. Burke ◽  
J.P. Koolaard ◽  
S. Muetzel ◽  
...  
Keyword(s):  
Feed Intake ◽  
Methane Emissions ◽  
Intake Level ◽  
Enteric Methane ◽  
Enteric Methane Emissions

490 Estimating enteric methane emission from beef heifers with different residual feed intake using greenfeed and respiration chambers

2017 ◽  
Vol 95 (suppl_4) ◽  
pp. 239-240
Author(s):  
A. W. Alemu ◽  
D. Vyas ◽  
G. Manafiazar ◽  
J. A. Basarab ◽  
K. A. Beauchemin
Keyword(s):  
Methane Emission ◽  
Feed Intake ◽  
Residual Feed Intake ◽  
Beef Heifers ◽  
Enteric Methane
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