Predictions of enteric methane emissions for various summer pasture and winter feeding strategies for cow calf production

Legesse, Getahun; Small, J. A.; Scott, Shannon L.; Crow, G. H.; Block, H. C.; Alemu, Aklilu W.; Robins, Clayton; Kebreab, E.

doi:10.1016/j.anifeedsci.2011.04.082

Cited by 12 publications

(4 citation statements)

References 31 publications

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“…On the Mongolian Plateau, native grassland is commonly used for grazing cattle and sheep and other activities related to livestock production [1]. Traditional livestock production on the Mongolian Plateau involves grazing in summer and hay feeding in winter [17]. The major constraint on livestock production is the shortage of high-quality feed in winter.…”

Section: Chemical Composition Of Inner Mongolian Native Grass Silagementioning

confidence: 99%

Dynamic changes and characterization of the protein and carbohydrate fractions of native grass grown in Inner Mongolia during ensiling and the aerobic stage

Na²,

et al. 2020

Asian-Australas J Anim Sci

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Objective: To improve the utility of native grass resources as feed in China, we investigated the dynamics of protein and carbohydrate fractions among Inner Mongolian native grasses, during ensiling and the aerobic stage, using the Cornell Net Carbohydrate and Protein System.Methods: Silages were prepared without or with lactic acid bacteria (LAB) inoculant. We analyzed the protein and carbohydrate fractions and fermentation quality of silages at 0, 5, 15, 20, 30, and 60 d of ensiling, and the stability at 0.5, 2, 5, and 10 d during the aerobic stage.Results: Inner Mongolian native grass contained 10.8% crude protein (CP) and 3.6% water-soluble carbohydrates (WSC) on a dry matter basis. During ensiling, pH and CP and WSC content decreased (p<0.05), whereas lactic acid and ammonia nitrogen (N) content increased (p<0.05). Non-protein N (PA) content increased significantly, whereas rapidly degraded true protein (PB1), intermediately degraded true protein (PB2), total carbohydrate (CHO), sugars (CA), starch (CB1), and degradable cell wall carbohydrate (CB2) content decreased during ensiling (p<0.05). At 30 d of ensiling, control and LAB-treated silages were well preserved and had lower pH (<4.2) and ammonia-N content (<0.4 g/kg of fresh matter [FM]) and higher lactic acid content (>1.0% of FM). During the aerobic stage, CP, extract ether, WSC, lactic acid, acetic acid, PB1, PB2, true protein degraded slowly (PB3), CHO, CA, CB1, and CB2 content decreased significantly in all silages, whereas pH, ammonia-N, PA, and bound true protein (PC) content increased significantly.Conclusion: Control and LAB-treated silages produced similar results in terms of fermentation quality, aerobic stability, and protein and carbohydrate fractions. Inner Mongolian native grass produced good silage, nutrients were preserved during ensiling and protein and carbohydrate losses largely occurred during the aerobic stage.

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Section: Chemical Composition Of Inner Mongolian Native Grass Silagementioning

confidence: 99%

Dynamic changes and characterization of the protein and carbohydrate fractions of native grass grown in Inner Mongolia during ensiling and the aerobic stage

Na²,

et al. 2020

Asian-Australas J Anim Sci

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“…gross energy intake in IPCC Tier 2; IPCC, 2006) or several variables (e.g. Kirchgessner, 1995) to more complex mechanistic and stochiometric models that require significantly more detailed data (e.g feed data like digestion rate and content of soluble carbohydrates (Legesse et al, 2011)). Simple regression equations are more user-friendly and included in many whole-farm models for calculating GHG emissions as well as used in LCA/CF studies.…”

Section: Livestock and Manurementioning

confidence: 99%

An LCA researcher's wish list – data and emission models needed to improve LCA studies of animal production

Cederberg

Henriksson

Berglund

2013

Animal

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The last decade has seen an increase in environmental systems analysis of livestock production, resulting in a significant number of studies with a holistic approach often based on life-cycle assessment (LCA) methodology. The growing public interest in global warming has added to this development; guidelines for carbon footprint (CF) accounting have been developed, including for greenhouse gas (GHG) accounting of animal products. Here we give an overview of methods for estimating GHG emissions, with emphasis on nitrous oxide, methane and carbon from land use change, presently used in LCA/CF studies of animal products. We discuss where methods and data availability for GHGs and nitrogen (N) compounds most urgently need to be improved in order to produce more accurate environmental assessments of livestock production. We conclude that the top priority is to improve models for N fluxes and emissions from soils and to implement soil carbon change models in LCA/CF studies of animal products. We also point at the need for more farm data and studies measuring emissions from soils, manure and livestock in developing countries.

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“…However, the use of simulation models to estimate the effect of the inclusion of feed additives in livestock production cycles, both at the level of total emissions and at the level of economic variables', is scarce ( 24 ). Then, as Legesse et al ( 25 ) pointed out, a need exists to include evaluation of the contribution of various feeding systems to GHG emissions that can be covered through simulation models.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Feed Strategies and Changes of Stocking Rate to Decrease the Carbon Footprint in a Traditional Cow-Calf System: A Simulation Model

Toro-Mújica

2021

Front. Vet. Sci.

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One of the main production challenges associated with climate change is the reduction of carbon emissions. Increasing the efficiency of resource utilization is one way to achieve this purpose. The modification of production systems through improved reproductive, genetic, feed, and grazing management practices has been proposed to increase technical–economic efficiency, even though the “environmental viability” of these modifications has not always been evaluated. The objective of this study was to evaluate the use of feeding and management strategies on the carbon footprint (CF) and economic variables in the traditional cow–calf system in southern Chile using a simulation model. The modifications evaluated corresponded to combinations of stocking rate, use of creep feeding practices with different supplementation levels, and the incorporation of feed additives to the supplement, using factorial experiments. Additionally, the scenarios were evaluated with and without carbon sequestration. The CF for the baseline scenarios was 12.5 ± 0.3 kg of CO2−eq/kg of live weight (LW) when carbon sequestration was considered and 13.0 ± 0.4 kg of CO2−eq/kg of LW in the opposite case. Changes in stocking rate, supplementation level, and consideration of carbon sequestration in pasture and soil had a significant effect on the CF in all simulated scenarios. The inclusion of additives in the supplement did not have a significant effect on production costs. With regard to reducing greenhouse gas (GHG) emissions, incorporating canola oil presented the best average results. The model developed made the selection of environmentally viable feed strategies or management adaptations possible.

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Predictions of enteric methane emissions for various summer pasture and winter feeding strategies for cow calf production

Cited by 12 publications

References 31 publications

Dynamic changes and characterization of the protein and carbohydrate fractions of native grass grown in Inner Mongolia during ensiling and the aerobic stage

Dynamic changes and characterization of the protein and carbohydrate fractions of native grass grown in Inner Mongolia during ensiling and the aerobic stage

An LCA researcher's wish list – data and emission models needed to improve LCA studies of animal production

Evaluation of Feed Strategies and Changes of Stocking Rate to Decrease the Carbon Footprint in a Traditional Cow-Calf System: A Simulation Model

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