Towards Sustainable Livestock Production: Estimation of Methane Emissions and Dietary Interventions for Mitigation

Pragna, Prathap; Chauhan, Surinder S.; Leury, Brian J; Cottrell, Jeremy J.; Dunshea, Frank R.

doi:10.3390/su13116081

Cited by 9 publications

(11 citation statements)

References 170 publications

(174 reference statements)

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“…Another possible reason for the decrease in CH 4 from the WD and BD-fed animals could be attributed to the higher propionate concentration in the WD-and BD-fed animals compared with the MD-fed animals and the decreased concentration of butyrate in the BD-fed animals than the WD and MD-fed sheep. The increased propionate production and decreased butyrate production in the rumen of BD-fed sheep could have freely available hydrogen in the rumen that would otherwise be used by methanogens to reduce CO 2 to produce CH 4 [15].…”

Section: Discussionmentioning

confidence: 99%

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Effects of Feeding a Commercial Starch Binding Agent during Heat Stress on Enteric Methane Emission, Rumen Volatile Fatty Acid Contents, and Diet Digestibility of Merino Lambs

et al. 2023

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Twenty-four Merino lambs were allocated to three dietary treatment groups to determine the effects of a dietary starch and protein binding agent and heat stress on methane (CH4) emissions and rumen parameters. The diets were a wheat-based diet (WD), a 2% Bioprotect™ (Bioprotect™, RealisticAgri, Rutland, UK) treated wheat-based diet (BD), and a maize-based diet (MD) for 3 periods of 1-week duration. During Period 1 (P1) the lambs were maintained under thermoneutral conditions and at a 1.7 × Maintenance (M) level. During P2 and P3, the lambs were maintained under cyclic heat stress conditions and fed at 1.7 × M and 2.0 × M, respectively. Total CH4 production was lower for the BD diet than the WD diet, which in turn was lower than the MD diet (p < 0.001). Total CH4 production was lower during P2 than P1 with P3 intermediate (p = 0.04). Rumen total volatile fatty acid (TVFA) concentrations were higher for the WD diet than the MD diet with the BD diet intermediate (p = 0.01). Rumen TVFA concentrations were lower during heat stress than under thermoneutral conditions (p < 0.001). Whole tract starch digestibility was higher for the BD and WD diets than the MD diet (p < 0.001). In conclusion, feeding Merino lambs the BD diet reduces CH4 emissions without reducing starch digestibility.

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Section: Discussionmentioning

confidence: 99%

“…Ruminants' contribution to global warming is one of the most contentious topics of the 21st century and the emissions are mainly in the form of enteric methane (CH 4 ) [15]. The CH 4 alone accounts for 47% of the livestock sector's total GHG emissions and 17.3% of global GHG emissions [16,17].…”

Section: Introductionmentioning

confidence: 99%

Effects of Feeding a Commercial Starch Binding Agent during Heat Stress on Enteric Methane Emission, Rumen Volatile Fatty Acid Contents, and Diet Digestibility of Merino Lambs

et al. 2023

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“…Mitigation strategies that do not hinder production while effectively reducing CH 4 emissions in cattle are necessary. In practice, sustainable cattle production should be economically viable, ensuring high efficiency and low emissions per unit of production [20]. Previous studies have demonstrated that increased livestock production contributes to higher CH 4 emissions unless effective strategies to mitigate GHG emissions in livestock systems are implemented [21].…”

Section: Introductionmentioning

confidence: 99%

Explaining Global Trends in Cattle Population Changes between 1961 and 2020 Directly Affecting Methane Emissions

2023

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Methane (CH4) emissions from agricultural sources contribute significantly to the total anthropogenic greenhouse gas emissions, which cause climate change. According to the guidelines of the International Panel on Climate Change (IPCC) for calculating greenhouse gas emissions, agriculture is responsible for approximately 10% of total CH4 emissions from anthropogenic sources. CH4 is primarily emitted from livestock farming, particularly from cattle production during enteric fermentation and from manure. This article describes the results of multivariate statistical analyses carried out on data collected from 1961 to 2020 for thirty countries with the largest cattle populations. The study evaluated the trends in temporal changes in cattle populations and identified groups of countries with similar patterns during the study period. The global cattle population was highly correlated with CH4 emissions from the enteric fermentation of cattle and their manure. The countries experiencing the largest increase in cattle population were primarily developing countries located in South America, Africa and Southeastern Asia. The cattle population in these countries showed a strong correlation with the human population. On the other hand, the countries where the cattle population remained stable during the study period were mainly highly developed countries. The correlations between most of the examined variables associated with cattle production and the cattle population in these countries were inconsistent and relatively weak. In the near future, further increase in the cattle population and the associated CH4 emissions are expected, mainly in developing countries with high population growth.

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“…, caproate, ethanol and propanol. These dynamics are imminently important for ruminant animals as they address the issue of acidosis(Prathap et al, 2021;Souza et al, 2020) …”

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confidence: 99%

Volatile fatty acids, proxies for methane production in ruminant animals

Washaya

Mupangwa

Mapfumo

et al. 2023

Preprint

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Determining enteric methane, produced by grazing extensively managed cattle is practically impossible. The objective of this study was to determine enteric methane yield from beef cows using VFAs as proxies. A total of 24 cows were randomly selected for the study. The animals were grouped and identified according to their parity: P1-P4. Rumen liquor samples were collected every fortnight for 12 months through a stomach tube, and VFA analysis was done using gas chromatography. The effect of parity and season (wet, dry and cold) on the mean concentrations of the VFAs and methane was analysed. Parity and season were considered as fixed factors while each individual cow was regarded as a random variable. The result indicates that parity and season influenced (P < 0.05) the acetate, isobutyric and isovaleric acid concentrations. A Parity x season interaction significantly influenced the propionate, butyric and valeric acid production (P < 0.05). There was an interaction (P < 0.05) between parity and season on methane production, animals in P3 had the highest methane values compared to other parities during the wet and cold seasons. It can be concluded that parity and season influence VFA and methane production, and VFAs can be used to predict enteric methane production for grazing animals.

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Towards Sustainable Livestock Production: Estimation of Methane Emissions and Dietary Interventions for Mitigation

Cited by 9 publications

References 170 publications

Effects of Feeding a Commercial Starch Binding Agent during Heat Stress on Enteric Methane Emission, Rumen Volatile Fatty Acid Contents, and Diet Digestibility of Merino Lambs

Effects of Feeding a Commercial Starch Binding Agent during Heat Stress on Enteric Methane Emission, Rumen Volatile Fatty Acid Contents, and Diet Digestibility of Merino Lambs

Explaining Global Trends in Cattle Population Changes between 1961 and 2020 Directly Affecting Methane Emissions

Volatile fatty acids, proxies for methane production in ruminant animals

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