Limits...
A Greenhouse Gas and Soil Carbon Model for Estimating the Carbon Footprint of Livestock Production in Canada.

Vergé XP, Dyer JA, Worth DE, Smith WN, Desjardins RL, McConkey BG - Animals (Basel) (2012)

Bottom Line: The payback period was defined as the number of years required for a GHG reduction to equal soil carbon lost from the associated land use shift.Displacing beef cattle with hogs resulted in a surplus area of forage.Agricultural GHG mitigation policies will inevitably involve a trade-off between production, land use and GHG emission reduction.

View Article: PubMed Central - PubMed

Affiliation: AAFC Consultant, Ottawa, ON, K2A 1G6, Canada. Xavier_vrg@yahoo.fr.

ABSTRACT
To assess tradeoffs between environmental sustainability and changes in food production on agricultural land in Canada the Unified Livestock Industry and Crop Emissions Estimation System (ULICEES) was developed. It incorporates four livestock specific GHG assessments in a single model. To demonstrate the application of ULICEES, 10% of beef cattle protein production was assumed to be displaced with an equivalent amount of pork protein. Without accounting for the loss of soil carbon, this 10% shift reduced GHG emissions by 2.5 TgCO₂e y(-1). The payback period was defined as the number of years required for a GHG reduction to equal soil carbon lost from the associated land use shift. A payback period that is shorter than 40 years represents a net long term decrease in GHG emissions. Displacing beef cattle with hogs resulted in a surplus area of forage. When this residual land was left in ungrazed perennial forage, the payback periods were less than 4 years and when it was reseeded to annual crops, they were equal to or less than 40 years. They were generally greater than 40 years when this land was used to raise cattle. Agricultural GHG mitigation policies will inevitably involve a trade-off between production, land use and GHG emission reduction. ULICEES is a model that can objectively assess these trade-offs for Canadian agriculture.

No MeSH data available.


Chart of the generalized computational flow of the Greenhouse Gas (GHG) emission budgets of the four major Canadian livestock industries.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
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animals-02-00437-f001: Chart of the generalized computational flow of the Greenhouse Gas (GHG) emission budgets of the four major Canadian livestock industries.

Mentions: Figure 1 presents the generalized computational flow of the set of calculations for quantifying the GHG emission budgets for Canadian livestock production. Only the functions common among all four livestock industries are illustrated. The yields, areas, and fertilizer application rates for each crop and population for each livestock type are shown as computational inputs. The resulting GHG emission categories and totals are shown at the bottom of the chart. Although ULICEES addresses the question of how to measure the carbon footprint of all food of animal origin in Canada [8], this chart does not show interactions among commodities and it only considers changes in soil CO2 emissions under a land use change. All of the GHGs associated with animal housing [19] were also taken into account in ULICEES.


A Greenhouse Gas and Soil Carbon Model for Estimating the Carbon Footprint of Livestock Production in Canada.

Vergé XP, Dyer JA, Worth DE, Smith WN, Desjardins RL, McConkey BG - Animals (Basel) (2012)

Chart of the generalized computational flow of the Greenhouse Gas (GHG) emission budgets of the four major Canadian livestock industries.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4494297&req=5

animals-02-00437-f001: Chart of the generalized computational flow of the Greenhouse Gas (GHG) emission budgets of the four major Canadian livestock industries.
Mentions: Figure 1 presents the generalized computational flow of the set of calculations for quantifying the GHG emission budgets for Canadian livestock production. Only the functions common among all four livestock industries are illustrated. The yields, areas, and fertilizer application rates for each crop and population for each livestock type are shown as computational inputs. The resulting GHG emission categories and totals are shown at the bottom of the chart. Although ULICEES addresses the question of how to measure the carbon footprint of all food of animal origin in Canada [8], this chart does not show interactions among commodities and it only considers changes in soil CO2 emissions under a land use change. All of the GHGs associated with animal housing [19] were also taken into account in ULICEES.

Bottom Line: The payback period was defined as the number of years required for a GHG reduction to equal soil carbon lost from the associated land use shift.Displacing beef cattle with hogs resulted in a surplus area of forage.Agricultural GHG mitigation policies will inevitably involve a trade-off between production, land use and GHG emission reduction.

View Article: PubMed Central - PubMed

Affiliation: AAFC Consultant, Ottawa, ON, K2A 1G6, Canada. Xavier_vrg@yahoo.fr.

ABSTRACT
To assess tradeoffs between environmental sustainability and changes in food production on agricultural land in Canada the Unified Livestock Industry and Crop Emissions Estimation System (ULICEES) was developed. It incorporates four livestock specific GHG assessments in a single model. To demonstrate the application of ULICEES, 10% of beef cattle protein production was assumed to be displaced with an equivalent amount of pork protein. Without accounting for the loss of soil carbon, this 10% shift reduced GHG emissions by 2.5 TgCO₂e y(-1). The payback period was defined as the number of years required for a GHG reduction to equal soil carbon lost from the associated land use shift. A payback period that is shorter than 40 years represents a net long term decrease in GHG emissions. Displacing beef cattle with hogs resulted in a surplus area of forage. When this residual land was left in ungrazed perennial forage, the payback periods were less than 4 years and when it was reseeded to annual crops, they were equal to or less than 40 years. They were generally greater than 40 years when this land was used to raise cattle. Agricultural GHG mitigation policies will inevitably involve a trade-off between production, land use and GHG emission reduction. ULICEES is a model that can objectively assess these trade-offs for Canadian agriculture.

No MeSH data available.