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Mackie RI, Kim H, Kim NK, Cann I. - Invited Review - Hydrogen production and hydrogen utilization in the rumen: key to mitigating enteric methane production. Anim Biosci 2024; 37:323-336. [PMID: 38186257 PMCID: PMC10838669 DOI: 10.5713/ab.23.0294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 10/13/2023] [Accepted: 11/08/2023] [Indexed: 01/09/2024] Open
Abstract
Molecular hydrogen (H2) and formate (HCOO-) are metabolic end products of many primary fermenters in the rumen ecosystem. Both play a vital role in fermentation where they are electron sinks for individual microbes in an anaerobic environment that lacks external electron acceptors. If H2 and/or formate accumulate within the rumen, the ability of primary fermenters to regenerate electron carriers may be inhibited and microbial metabolism and growth disrupted. Consequently, H2- and/or formate-consuming microbes such as methanogens and possibly homoacetogens play a key role in maintaining the metabolic efficiency of primary fermenters. There is increasing interest in identifying approaches to manipulate the rumen ecosystem for the benefit of the host and the environment. As H2 and formate are important mediators of interspecies interactions, an understanding of their production and utilization could be a significant starting point for the development of successful interventions aimed at redirecting electron flow and reducing methane emissions. We conclude by discussing in brief ruminant methane mitigation approaches as a model to help understand the fate of H2 and formate in the rumen ecosystem.
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Affiliation(s)
- Roderick I. Mackie
- Department of Animal Sciences, University of Illinois, Urbana, IL 61801,
USA
- Carle R. Woese Institute for Genomic Biology, University of Illinois, Urbana, IL 61801,
USA
| | - Hyewon Kim
- Department of Animal Sciences, University of Illinois, Urbana, IL 61801,
USA
| | - Na Kyung Kim
- Department of Animal Sciences, University of Illinois, Urbana, IL 61801,
USA
| | - Isaac Cann
- Department of Animal Sciences, University of Illinois, Urbana, IL 61801,
USA
- Carle R. Woese Institute for Genomic Biology, University of Illinois, Urbana, IL 61801,
USA
- Department of Microbiology, University of Illinois, Urbana, IL 61801,
USA
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2
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Volmer JG, McRae H, Morrison M. The evolving role of methanogenic archaea in mammalian microbiomes. Front Microbiol 2023; 14:1268451. [PMID: 37727289 PMCID: PMC10506414 DOI: 10.3389/fmicb.2023.1268451] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 08/18/2023] [Indexed: 09/21/2023] Open
Abstract
Methanogenic archaea (methanogens) represent a diverse group of microorganisms that inhabit various environmental and host-associated microbiomes. These organisms play an essential role in global carbon cycling given their ability to produce methane, a potent greenhouse gas, as a by-product of their energy production. Recent advances in culture-independent and -dependent studies have highlighted an increased prevalence of methanogens in the host-associated microbiome of diverse animal species. Moreover, there is increasing evidence that methanogens, and/or the methane they produce, may play a substantial role in human health and disease. This review addresses the expanding host-range and the emerging view of host-specific adaptations in methanogen biology and ecology, and the implications for host health and disease.
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Affiliation(s)
- James G. Volmer
- Centre for Microbiome Research, School of Biomedical Sciences, Queensland University of Technology (QUT), Translational Research Institute, Woolloongabba, QLD, Australia
| | - Harley McRae
- Faculty of Medicine, University of Queensland Frazer Institute, Translational Research Institute, Woolloongabba, QLD, Australia
| | - Mark Morrison
- Faculty of Medicine, University of Queensland Frazer Institute, Translational Research Institute, Woolloongabba, QLD, Australia
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3
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Keba D, Tolemariam T, Demeke S, Alkhtib A. Corncob biochar supplementation improves nutrient digestibility, fattening performance and carcass characteristics of fattening sheep. Vet Med Sci 2023; 9:967-973. [PMID: 36622266 PMCID: PMC10029877 DOI: 10.1002/vms3.1072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Corncob is a cheap source for biochar in developing countries. No studies reported on use of biochar as sheep fattening supplement. OBJECTIVES The goal of this study is to determine the effect of corncob biochar supplementation on growth performance and carcass characteristics of sheep. METHODS Twenty-four Horro yearling rams (18.6 ± 0.938 kg live weight) were randomly distributed to four groups, control (300 g/day concentrate + local hay ad libitum), BC1.5 (control +1.5 g/day biochar), BC3 (control +3 g/day biochar) and BC4.5 (control +4.5/day biochar). The experimental concentrate consisted of 200 g/day wheat bran and 100 g/day Noug cake. The study consisted of a growth trial of 111 days followed by a digestibility trial of 10 days. Carcass characteristics for all rams were recorded at the end of the trial. RESULTS Dry matter intake, crude protein intake, dry matter digestibility and acid detergent fibre digestibility of BC1.5 were significantly higher than the control. Corncob biochar supplementation significantly improved daily weight gain and feed conversion ratio of the rams. Supplementation sheep with corncob biochar improved significantly dressing percentage, hindquarters weight, forequarters weight, ribs weight, brisket weigh and rib eye muscle area. There was a significant effect of the dietary treatment on weight of internal organs; however, they were all within the normal range of sheep. CONCLUSIONS Corncob biochar supplementation would be recommended at a level of 1.5 g/day to improve growth performance and carcass characteristics of sheep.
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Affiliation(s)
- Dereje Keba
- College, of Agriculture and Veterinary Science, Ambo University, Ambo, Ethiopia
- Department of Animal Science, College of Agriculture and Veterinary Medicine, Jimma University, Jimma, Ethiopia
| | - Taye Tolemariam
- Department of Animal Science, College of Agriculture and Veterinary Medicine, Jimma University, Jimma, Ethiopia
| | - Solomon Demeke
- Department of Animal Science, College of Agriculture and Veterinary Medicine, Jimma University, Jimma, Ethiopia
| | - Ashraf Alkhtib
- School of Animal, Rural and Environmental Sciences, Nottingham Trent University, Nottingham, UK
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4
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Karekar SC, Ahring BK. Reducing methane production from rumen cultures by bioaugmentation with homoacetogenic bacteria. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2022.102526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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5
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Liang Z, Zhang J, Du M, Ahmad AA, Wang S, Zheng J, Salekdeh GH, Yan P, Han J, Tong B, Ding X. Age-dependent changes of hindgut microbiota succession and metabolic function of Mongolian cattle in the semi-arid rangelands. Front Microbiol 2022; 13:957341. [PMID: 35935190 PMCID: PMC9354825 DOI: 10.3389/fmicb.2022.957341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 06/28/2022] [Indexed: 11/23/2022] Open
Abstract
Dietary changes have significant effects on gut microbiota and host health. Weaning is an important stage of dietary change in ruminants. The gastrointestinal tract (GIT) microbiota of calf in the early life undergo some changes, and the plasticity of the calf is beneficial to cope with these changes and challenges. However, the complex development of hindgut microorganisms in post-weaning ruminants is not fully understood. In this study, we used 16S rRNA sequencing and untargeted metabolomic analysis to determine the cecal and colonic bacterial community and associated metabolome of Mongolian cattle at age of the 5th (at weaning), 18th, and 36th months. Moreover, the maturation patterns of the hindgut bacterial community and the dynamic changes of metabolites were also explored. Sequencing results showed that Firmicutes and Bacteroidetes were the dominant phyla in the cecum and colon. The linear discriminant analysis (LDA) effect size (LEfSe) analysis revealed bacterial features that were stage-specific in the cecum and colon. The relative abundance of Ruminococcaceae, a microbial family related to fiber degradation, gradually increased with age in the cecum, while the relative abundance of Bacteroides and Alistipes, which are related to immunity, gradually increased in the colon. The differential metabolites in the cecum and colon were mainly enriched in steroid hormone biosynthesis, primary bile acid biosynthesis, and arachidonic acid metabolism between different ages of Mongolian cattle after weaning. Consequently, this dual omics analysis provided important information on the changes in microbial and metabolite interactions in Mongolian cattle after weaning. The microorganisms and metabolites in the cecum and colon further enhanced the abiotic stress resistance of Mongolian cattle to the harsh environment. The information obtained in this study is of great significance for future strategies of cecum and colon microbiota regulation of post-weaning Mongolian cattle in the harsh Mongolian Plateau ecosystem.
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Affiliation(s)
- Zeyi Liang
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Jianbo Zhang
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Mei Du
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Anum Ali Ahmad
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Shengyi Wang
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Juanshan Zheng
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Ghasem Hosseini Salekdeh
- Agricultural Biotechnology Research Institute of Iran, Agricultural Research, Education, and Extension Organization, Karaj, Iran
| | - Ping Yan
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Jianlin Han
- International Livestock Research Institute (ILRI), Nairobi, Kenya
| | - Bin Tong
- School of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Xuezhi Ding
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
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6
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Effect of mid-term oral administration of the Caesalpinia coriaria extract on the sustainable mitigation of equine fecal methane, carbon monoxide and hydrogen sulfide productions. J Equine Vet Sci 2022; 115:104021. [DOI: 10.1016/j.jevs.2022.104021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/17/2022] [Accepted: 05/18/2022] [Indexed: 02/03/2023]
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7
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Kelly WJ, Mackie RI, Attwood GT, Janssen PH, McAllister TA, Leahy SC. Hydrogen and formate production and utilisation in the rumen and the human colon. Anim Microbiome 2022; 4:22. [PMID: 35287765 PMCID: PMC8919644 DOI: 10.1186/s42523-022-00174-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 03/02/2022] [Indexed: 12/31/2022] Open
Abstract
Molecular hydrogen (H2) and formate (HCOO-) are metabolic end products of many primary fermenters in the mammalian gut. Both play a vital role in fermentation where they are electron sinks for individual microbes in an anaerobic environment that lacks external electron acceptors. If H2 and/or formate accumulate within the gut ecosystem, the ability of primary fermenters to regenerate electron carriers may be inhibited and microbial metabolism and growth disrupted. Consequently, H2- and/or formate-consuming microbes such as methanogens and homoacetogens play a key role in maintaining the metabolic efficiency of primary fermenters. There is increasing interest in identifying approaches to manipulate mammalian gut environments for the benefit of the host and the environment. As H2 and formate are important mediators of interspecies interactions, an understanding of their production and utilisation could be a significant entry point for the development of successful interventions. Ruminant methane mitigation approaches are discussed as a model to help understand the fate of H2 and formate in gut systems.
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Affiliation(s)
- William J Kelly
- New Zealand Agricultural Greenhouse Gas Research Centre (NZAGRC), Palmerston North, New Zealand
- AgResearch, Grasslands Research Centre, Palmerston North, New Zealand
| | | | - Graeme T Attwood
- AgResearch, Grasslands Research Centre, Palmerston North, New Zealand
| | - Peter H Janssen
- AgResearch, Grasslands Research Centre, Palmerston North, New Zealand
| | | | - Sinead C Leahy
- New Zealand Agricultural Greenhouse Gas Research Centre (NZAGRC), Palmerston North, New Zealand.
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8
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Khusro A, Sahibzada MUK, Khan SU, Rajakrishnan R, Elghandour MM, Salem AZ, Kuppusamy P, Alcala-Canto Y, Tirado-González DN. Anti-methanogenic traits of safflower oil compounds against Methyl-coenzyme M reductase receptor in equines: An in silico docking analysis. J Equine Vet Sci 2022; 113:103938. [DOI: 10.1016/j.jevs.2022.103938] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 03/18/2022] [Accepted: 03/21/2022] [Indexed: 01/27/2023]
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9
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Karekar S, Stefanini R, Ahring B. Homo-Acetogens: Their Metabolism and Competitive Relationship with Hydrogenotrophic Methanogens. Microorganisms 2022; 10:microorganisms10020397. [PMID: 35208852 PMCID: PMC8875654 DOI: 10.3390/microorganisms10020397] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 02/01/2022] [Accepted: 02/02/2022] [Indexed: 12/04/2022] Open
Abstract
Homo-acetogens are microbes that have the ability to grow on gaseous substrates such as H2/CO2/CO and produce acetic acid as the main product of their metabolism through a metabolic process called reductive acetogenesis. These acetogens are dispersed in nature and are found to grow in various biotopes on land, water and sediments. They are also commonly found in the gastro-intestinal track of herbivores that rely on a symbiotic relationship with microbes in order to breakdown lignocellulosic biomass to provide the animal with nutrients and energy. For this motive, the fermentation scheme that occurs in the rumen has been described equivalent to a consolidated bioprocessing fermentation for the production of bioproducts derived from livestock. This paper reviews current knowledge of homo-acetogenesis and its potential to improve efficiency in the rumen for production of bioproducts by replacing methanogens, the principal H2-scavengers in the rumen, thus serving as a form of carbon sink by deviating the formation of methane into bioproducts. In this review, we discuss the main strategies employed by the livestock industry to achieve methanogenesis inhibition, and also explore homo-acetogenic microorganisms and evaluate the members for potential traits and characteristics that may favor competitive advantage over methanogenesis, making them prospective candidates for competing with methanogens in ruminant animals.
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Affiliation(s)
- Supriya Karekar
- Bioproducts Science and Engineering Laboratory, Washington State University Tri-Cities, 2720 Crimson Way, Richland, WA 99354, USA; (S.K.); (R.S.)
- Department of Biological Systems Engineering, Washington State University, Pullman, WA 99163, USA
| | - Renan Stefanini
- Bioproducts Science and Engineering Laboratory, Washington State University Tri-Cities, 2720 Crimson Way, Richland, WA 99354, USA; (S.K.); (R.S.)
- Department of Biological Systems Engineering, Washington State University, Pullman, WA 99163, USA
| | - Birgitte Ahring
- Bioproducts Science and Engineering Laboratory, Washington State University Tri-Cities, 2720 Crimson Way, Richland, WA 99354, USA; (S.K.); (R.S.)
- Department of Biological Systems Engineering, Washington State University, Pullman, WA 99163, USA
- The Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99163, USA
- Correspondence:
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10
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Osman AI, Fawzy S, Farghali M, El-Azazy M, Elgarahy AM, Fahim RA, Maksoud MIAA, Ajlan AA, Yousry M, Saleem Y, Rooney DW. Biochar for agronomy, animal farming, anaerobic digestion, composting, water treatment, soil remediation, construction, energy storage, and carbon sequestration: a review. ENVIRONMENTAL CHEMISTRY LETTERS 2022; 20:2385-2485. [PMID: 35571983 PMCID: PMC9077033 DOI: 10.1007/s10311-022-01424-x] [Citation(s) in RCA: 52] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 02/22/2022] [Indexed: 05/06/2023]
Abstract
In the context of climate change and the circular economy, biochar has recently found many applications in various sectors as a versatile and recycled material. Here, we review application of biochar-based for carbon sink, covering agronomy, animal farming, anaerobic digestion, composting, environmental remediation, construction, and energy storage. The ultimate storage reservoirs for biochar are soils, civil infrastructure, and landfills. Biochar-based fertilisers, which combine traditional fertilisers with biochar as a nutrient carrier, are promising in agronomy. The use of biochar as a feed additive for animals shows benefits in terms of animal growth, gut microbiota, reduced enteric methane production, egg yield, and endo-toxicant mitigation. Biochar enhances anaerobic digestion operations, primarily for biogas generation and upgrading, performance and sustainability, and the mitigation of inhibitory impurities. In composts, biochar controls the release of greenhouse gases and enhances microbial activity. Co-composted biochar improves soil properties and enhances crop productivity. Pristine and engineered biochar can also be employed for water and soil remediation to remove pollutants. In construction, biochar can be added to cement or asphalt, thus conferring structural and functional advantages. Incorporating biochar in biocomposites improves insulation, electromagnetic radiation protection and moisture control. Finally, synthesising biochar-based materials for energy storage applications requires additional functionalisation.
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Affiliation(s)
- Ahmed I. Osman
- School of Chemistry and Chemical Engineering, Queen’s University Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG Northern Ireland UK
| | - Samer Fawzy
- School of Chemistry and Chemical Engineering, Queen’s University Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG Northern Ireland UK
| | - Mohamed Farghali
- Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555 Japan
- Department of Animal and Poultry Hygiene and Environmental Sanitation, Faculty of Veterinary Medicine, Assiut University, Assiut, 71526 Egypt
| | - Marwa El-Azazy
- Department of Chemistry, Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, 2713 Doha, Qatar
| | - Ahmed M. Elgarahy
- Environmental Science Department, Faculty of Science, Port Said University, Port Said, Egypt
- Egyptian Propylene and Polypropylene Company (EPPC), Port-Said, Egypt
| | - Ramy Amer Fahim
- National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - M. I. A. Abdel Maksoud
- National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Abbas Abdullah Ajlan
- Department of Chemistry -Faculty of Applied Science, Taiz University, P.O.Box 6803, Taiz, Yemen
| | - Mahmoud Yousry
- Faculty of Engineering, Al-Azhar University, Cairo, 11651 Egypt
- Cemart for Building Materials and Insulation, postcode 11765, Cairo, Egypt
| | - Yasmeen Saleem
- Institute of Food and Agricultural Sciences, Soil and Water Science, The University of Florida, Gainesville, FL 32611 USA
| | - David W. Rooney
- School of Chemistry and Chemical Engineering, Queen’s University Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG Northern Ireland UK
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11
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Li X. Plant cell wall chemistry: implications for ruminant utilisation. JOURNAL OF APPLIED ANIMAL NUTRITION 2021. [DOI: 10.3920/jaan2020.0017] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Ruminants have adapted to cope with bulky, fibrous forage diets by accommodating a large, diverse microbial population in the reticulo-rumen. Ruminants are dependent on forages as their main sources of energy and other nutrients. Forages are comprised of a complex matrix of cellulose, hemicellulose, protein, minerals and phenolic compounds (including lignin and tannins) with various linkages; many of which are poorly defined. The composition and characteristics of polysaccharides vary greatly among forages and plant cell walls. Plant cell walls are linked and packed together in tight configurations to resist degradation, and hence their nutritional value to animals varies considerably, depending on composition, structure and degradability. An understanding of the inter-relationship between the chemical composition and the degradation of plant cell walls by rumen microorganisms is of major economic importance to ruminant production. Increasing the efficiency of fibre degradation in the rumen has been the subject of extensive research for many decades. This review summarises current knowledge of forage chemistry in order to develop strategies to increase efficiency of forage utilisation by ruminants.
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Affiliation(s)
- X. Li
- The University of Queensland, School of Agriculture and Food Sciences, Gatton, Qld 4343, Australia
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12
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Do different livestock dwellings on single grassland share similar faecal microbial communities? Appl Microbiol Biotechnol 2019; 103:5023-5037. [PMID: 31055653 DOI: 10.1007/s00253-019-09849-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 03/25/2019] [Accepted: 04/11/2019] [Indexed: 12/27/2022]
Abstract
Huge numbers of microorganisms reside in livestock faeces and constitute one of the most complex microbial ecosystems. Here, faecal microbial communities of three typical livestock in Xilingol steppe grassland, i.e. sheep, cattle, and horse, were investigated by Illumina MiSeq sequencing and quantitative real-time polymerase chain reaction (qPCR). Firmicutes and Bacteroidetes comprised the majority of bacterial communities in three livestock faeces. Sordariomycetes, Leotiomycetes, and Dothideomycetes were dominant in fungal communities, as well as Methanobacteria and Methanomicrobia were dominant in archaeal communities in three livestock faeces. Similar fungal community dominated in these samples, with 95.51% of the sequences falling into the overlap of three livestock faeces. In contrast, bacterial communities were quite variable among three different livestock faeces, but a similar community was observed in sheep and cattle faeces. Nearly all the archaea were identified as methanogens, whilst the most diverse and abundant methanogens were detected in cattle faeces. Potential pathogens including Bacteroides spp., Desulfovibrio spp., and Fusarium spp. were also detected in livestock faeces. Overall, this study provides the first detailed microbial comparison of typical livestock faeces dwelling on single grassland, and may be help guide management strategies for livestock grazing and grassland restoration.
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13
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Goopy JP. Creating a low enteric methane emission ruminant: what is the evidence of success to the present and prospects for developing economies? ANIMAL PRODUCTION SCIENCE 2019. [DOI: 10.1071/an18457] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Enteric methane emissions from livestock constitute a greater part of anthropogenic greenhouse gases (GHGs) in Africa, than in more industrialised economies, providing a strong incentive for the development of low methane phenotype ruminants. Although dietary and husbandry options already exist for lowering methane production, means of changing ‘methane status’ of animals enduringly has a strong appeal. This paper is a critical review the empirical success to date of attempts to alter this status. Introduction of reductive acetogens, defaunation, anti-methanogen vaccines, early life programming and genetic selection at both the rumen and animal level are considered in turn. It is concluded that to date, there is little in vivo evidence to support the practical success of any of these strategies, save selective breeding, and this at a high cost with unknown efficacy. Finally, it is suggested that for developing economies management and nutritional strategies to reduce emissions will have the greatest and most immediate impact, at the lowest cost.
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14
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Bryden WL. Science: on the shoulders of those who came before us. ANIMAL PRODUCTION SCIENCE 2019. [DOI: 10.1071/anv59n1_ed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Elghandour MMMY, Adegbeye MJ, Barbabosa-Pilego A, Perez NR, Hernández SR, Zaragoza-Bastida A, Salem AZM. Equine Contribution in Methane Emission and Its Mitigation Strategies. J Equine Vet Sci 2018; 72:56-63. [PMID: 30929784 DOI: 10.1016/j.jevs.2018.10.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 10/17/2018] [Accepted: 10/17/2018] [Indexed: 11/26/2022]
Abstract
Greenhouses gas emission mitigation is a very important aspect of earth sustainability with greenhouse gasses reduction, a focus of agricultural and petrochemical industries. Methane is produced in nonruminant herbivores such as horses because they undergo hindgut fermentation. Although equine produce less methane than ruminant, increasing population of horses might increase their contribution to the present 1.2 to 1.7 Tg, estimate. Diet, feeding frequency, season, genome, and protozoa population influence methane production equine. In population, Methanomicrobiales, Methanosarcinales, Methanobacteriales, and Methanoplasmatales are the clade identified in equine. Methanocorpusculum labreanum is common among hindgut fermenters like horses and termite. Naturally, acetogenesis and interrelationship between the host and the immune-anatomical interaction are responsible for the reduced methane output in horses. However, to reduce methane output in equine, and increase energy derived from feed intake, the use of biochar, increase in acetogens, inclusion of fibre enzymes and plant extract, and recycling of fecal energy through anaerobic gas fermentation. These might be feasible ways to reducing methane contribution from horse and could be applied to ruminants too.
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Affiliation(s)
- Mona M M Y Elghandour
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma del Estado de México, Estado de México, México
| | - Moyosore Joseph Adegbeye
- Department of Animal Science, College of Agriculture, Joseph Ayo Babalola University, Ilesha, Nigeria
| | - Alberto Barbabosa-Pilego
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma del Estado de México, Estado de México, México
| | - Nallely Rivero Perez
- Área Académica de Medicina Veterinaria y Zootecnia, Instituto de Ciencias Agropecuaria, Universidad Autónoma del Estado de Hidalgo, Pachuca, Mexico
| | - Saúl Rojas Hernández
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma de Guerrero, Guerrero, Mexico
| | - Adrian Zaragoza-Bastida
- Área Académica de Medicina Veterinaria y Zootecnia, Instituto de Ciencias Agropecuaria, Universidad Autónoma del Estado de Hidalgo, Pachuca, Mexico
| | - Abdelfattah Z M Salem
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autónoma del Estado de México, Estado de México, México.
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