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Animals
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Methane Production in Ruminants, Enteric, and Manure Emissions
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Methane Production in Ruminants, Enteric, and Manure Emissions

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Cattle".

Deadline for manuscript submissions: closed (31 August 2021) | Viewed by 46194

Special Issue Editor

Dr. Mohammad Ramin

E-Mail Website
Guest Editor
Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences, 90183 Umeå, Sweden
Interests: animal and dairy science

Special Issue Information

Dear Colleagues,

In this Special Issue, we aim to gather publications regarding methane production in ruminants with a special emphasis on dairy cows. There are many strategies available to reduce enteric methane production. Within the agriculture sector, methane production from enteric fermentation in dairy cows contributes the most. However, there are a limited number of studies reporting the amount of methane produced from manure and strategies to reduce the emission from manure. The extent of manure contribution to total greenhouse gas emission depends on many factors that need to be investigated further. Techniques to measure methane production from enteric fermentation in dairy cows are widely evaluated but not from manure. In this Special Issue, the scope would be papers describing new strategies to reduce methane production from enteric and manure in ruminants with new techniques to measure emissions from manure.

Dr. Mohammad Ramin
Guest Editor

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Keywords

  • manure methane emission
  • dairy cows
  • inhibitor
  • strategies of inhibition
  • enteric fermentation
  • measuring techniques

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Published Papers (6 papers)

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Research

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14 pages, 793 KiB  
Article
Enteric and Fecal Methane Emissions from Dairy Cows Fed Grass or Corn Silage Diets Supplemented with Rapeseed Oil
by Mohammad Ramin, Juana C. Chagas, Hauke Smidt, Ruth Gomez Exposito and Sophie J. Krizsan
Animals 2021, 11(5), 1322; https://doi.org/10.3390/ani11051322 - 5 May 2021
Cited by 13 | Viewed by 3683
Abstract
This study evaluated potential trade-offs between enteric methane (CH4) emissions and CH4 emissions from feces of dairy cows fed grass silage or partial replacement of grass silage with corn silage, both with and without supplementation of rapeseed oil. Measured data [...] Read more.
This study evaluated potential trade-offs between enteric methane (CH4) emissions and CH4 emissions from feces of dairy cows fed grass silage or partial replacement of grass silage with corn silage, both with and without supplementation of rapeseed oil. Measured data for eight dairy cows (two blocks) included in a production trial were analyzed. Dietary treatments were grass silage (GS), GS supplemented with rapeseed oil (GS-RSO), GS plus corn silage (GSCS), and GSCS supplemented with rapeseed oil (GSCS-RSO). Feces samples were collected after each period and incubated for nine weeks to estimate fecal CH4 emissions. Including RSO (0.5 kg/d) in the diet decreased dry matter intake (DMI) by 1.75 kg/d. Enteric CH4 emissions were reduced by inclusion of RSO in the diet (on average 473 vs. 607 L/d). In 9-week incubations, there was a trend for lower CH4 emissions from feces of cows fed diets supplemented with RSO (on average 3.45 L/kg DM) than cows with diets not supplemented with RSO (3.84 L/kg DM). Total CH4 emissions (enteric + feces, L/d) were significantly lower for the cows fed diets supplemented with RSO. Total fecal CH4 emissions were similar between treatments, indicating no trade-offs between enteric and fecal CH4 emissions. Full article
(This article belongs to the Special Issue Methane Production in Ruminants, Enteric, and Manure Emissions)
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13 pages, 1693 KiB  
Article
Measurement of Enteric Methane Emissions by the SF6 Technique Is Not Affected by Ambient Weather Conditions
by Peter J. Moate, Jennie E. Pryce, Leah C. Marett, Josie B. Garner, Matthew H. Deighton, Brigid E. Ribaux, Murray C. Hannah, William J. Wales and S. Richard O. Williams
Animals 2021, 11(2), 528; https://doi.org/10.3390/ani11020528 - 18 Feb 2021
Cited by 10 | Viewed by 2548
Abstract
Despite the fact that the sulphur hexafluoride (SF6) tracer technique was developed over 25 years ago to measure methane production from grazing and non-housed animals, no studies have specifically investigated whether ambient wind speed, temperature, relative humidity and rainfall influence the [...] Read more.
Despite the fact that the sulphur hexafluoride (SF6) tracer technique was developed over 25 years ago to measure methane production from grazing and non-housed animals, no studies have specifically investigated whether ambient wind speed, temperature, relative humidity and rainfall influence the accuracy of the method. The aim of this research was to investigate how these weather factors influence the measurement of enteric methane production by the SF6 technique. Six different cohorts of dairy cows (40 per cohort) were kept outdoors and fed a common diet during spring in 3 consecutive years. Methane production from individual cows was measured daily over the last 5 days of each 32-day period. An automated weather station measured air temperature, wind speed, relative humidity and rainfall every 10 min. Regression analyses were used to relate the average daily wind speed, average daily temperature, average daily relative humidity and total daily rainfall measurements to dry matter intake, average daily methane production and methane yield of each cohort of cows. It was concluded that the modified SF6 technique can be used outdoors during a range of wind speeds, ambient temperatures, relative humidities and rainfall conditions without causing a significant effect on the measurement of methane production or methane yield of dairy cows. Full article
(This article belongs to the Special Issue Methane Production in Ruminants, Enteric, and Manure Emissions)
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17 pages, 897 KiB  
Article
Supplementing Northern Australian Beef Cattle with Desmanthus Tropical Legume Reduces In-Vivo Methane Emissions
by Bénédicte Suybeng, Edward Charmley, Christopher P. Gardiner, Bunmi S. Malau-Aduli and Aduli E.O. Malau-Aduli
Animals 2020, 10(11), 2097; https://doi.org/10.3390/ani10112097 - 11 Nov 2020
Cited by 19 | Viewed by 4222
Abstract
The main objective of this study was to investigate the effect of supplementing beef cattle with incremental levels of Desmanthus leptophyllus cv. JCU1 and Desmanthus bicornutus cv. JCU4 on in vivo methane (CH4) emissions and the role of tannins in rumen [...] Read more.
The main objective of this study was to investigate the effect of supplementing beef cattle with incremental levels of Desmanthus leptophyllus cv. JCU1 and Desmanthus bicornutus cv. JCU4 on in vivo methane (CH4) emissions and the role of tannins in rumen fermentation. Fourteen yearling Droughtmaster steers were allocated to each of the two Desmanthus species and offered a basal diet of Rhodes grass (Chloris gayana) hay plus fresh Desmanthus at 0%, 15%, 22%, and 31% of dry matter intake (DMI). The 15% and 31% Desmanthus periods lasted 21 days and the 22 and 0% Desmanthus periods, 14 days. Methane production was measured by open-circuit gas exchange in the last two days of each period. The results showed a linear increase in DMI and reduction in CH4 yield with the increasing level of Desmanthus and subsequently condensed tannins in the diet. The added tannin binder polyethylene glycol-4000 did not affect CH4 yield but increased rumen NH3-N and iso-acid concentrations. Therefore, on a low-quality diet, Desmanthus has the potential to increase intake and reduce CH4 emissions. Even though its tannins can bind rumen proteins, the beef cattle anti-methanogenic response to supplementation with Desmanthus may be a combination of rumen fermentation and tannin effects. Full article
(This article belongs to the Special Issue Methane Production in Ruminants, Enteric, and Manure Emissions)
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15 pages, 382 KiB  
Article
Carbon Footprint Assessment of Spanish Dairy Cattle Farms: Effectiveness of Dietary and Farm Management Practices as a Mitigation Strategy
by Ridha Ibidhi and Sergio Calsamiglia
Animals 2020, 10(11), 2083; https://doi.org/10.3390/ani10112083 - 10 Nov 2020
Cited by 13 | Viewed by 4751
Abstract
Greenhouse gas emissions and the carbon footprint (CF) were estimated in twelve Spanish dairy farms selected from three regions (Mediterranean, MED; Cantabric, CAN; and Central, CEN) using a partial life cycle assessment through the Integrated Farm System Model (IFSM). The functional unit was [...] Read more.
Greenhouse gas emissions and the carbon footprint (CF) were estimated in twelve Spanish dairy farms selected from three regions (Mediterranean, MED; Cantabric, CAN; and Central, CEN) using a partial life cycle assessment through the Integrated Farm System Model (IFSM). The functional unit was 1 kg of energy corrected milk (ECM). Methane emissions accounted for the largest contribution to the total greenhouse gas (GHG) emissions. The average CF (kg CO2-eq/kg of ECM) was 0.84, being the highest in MED (0.98), intermediate in CEN (0.84), and the lowest in CAN (0.67). Two extreme farms were selected for further simulations: one with the highest non-enteric methane (MED1), and another with the highest enteric methane (CAN2). Changes in management scenarios (increase milk production, change manure collection systems, change manure-type storage method, change bedding type and installation of an anaerobic digester) in MED1 were evaluated with the IFSM model. Changes in feeding strategies (reduce the forage: concentrate ratio, improve forage quality, use of ionophores) in CAN2 were evaluated with the Cornell Net Carbohydrate and Protein System model. Results indicate that changes in management (up to 27.5% reduction) were more efficient than changes in dietary practices (up to 3.5% reduction) in reducing the carbon footprint. Full article
(This article belongs to the Special Issue Methane Production in Ruminants, Enteric, and Manure Emissions)
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17 pages, 350 KiB  
Article
Effects of Three Herbs on Methane Emissions from Beef Cattle
by María Fernanda Vázquez-Carrillo, Hugo Daniel Montelongo-Pérez, Manuel González-Ronquillo, Epigmenio Castillo-Gallegos and Octavio Alonso Castelán-Ortega
Animals 2020, 10(9), 1671; https://doi.org/10.3390/ani10091671 - 16 Sep 2020
Cited by 20 | Viewed by 7502
Abstract
The objectives of the present work were to evaluate the in vivo antimethanogenic effects of Cymbopogon citratus (CC), Matricaria chamomilla (MC) and Cosmos bipinnatus (CB) on beef cattle fed a high in concentrate diet (forage-to-concentrate ratio [F:C] of 19.4:80.6), and the effects of [...] Read more.
The objectives of the present work were to evaluate the in vivo antimethanogenic effects of Cymbopogon citratus (CC), Matricaria chamomilla (MC) and Cosmos bipinnatus (CB) on beef cattle fed a high in concentrate diet (forage-to-concentrate ratio [F:C] of 19.4:80.6), and the effects of increasing levels of CC (0%, 2%, 3%, and 4% of the daily DM intake (DMI)) on enteric CH4 emissions by beef cattle fed a ration low in concentrate (F:C ratio of 49.3:50.7). Two experiments were conducted to address the objectives. For the first experiment, eight Charolais × Brown Swiss steers distributed in a replicated 4 × 4 Latin square experimental design were used. Four treatments were evaluated: (1) control diet (CO), (2) CO + 365 g dry matter (DM)/d CB, (3) CO + 365 g DM/d MC, (4) CO + 100 g DM/d CC. For Experiment 2, four Charolais x Brown Swiss steers distributed in a single 4 × 4 Latin square design were used. It was concluded that 100 g DM per day CC and 365 g DM per day CB (Experiment 1) reduced CH4 yield of beef cattle. In Experiment 2, CC supplementation levels exceeding 2% of DMI reduced daily CH4 emissions but at the expense of decreasing digestibility of DM. Full article
(This article belongs to the Special Issue Methane Production in Ruminants, Enteric, and Manure Emissions)

Review

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20 pages, 352 KiB  
Review
Methane Emissions from Ruminants in Australia: Mitigation Potential and Applicability of Mitigation Strategies
by John L. Black, Thomas M. Davison and Ilona Box
Animals 2021, 11(4), 951; https://doi.org/10.3390/ani11040951 - 29 Mar 2021
Cited by 75 | Viewed by 22367
Abstract
Anthropomorphic greenhouse gases are raising the temperature of the earth and threatening ecosystems. Since 1950 atmospheric carbon dioxide has increased 28%, while methane has increased 70%. Methane, over the first 20 years after release, has 80-times more warming potential as a greenhouse gas [...] Read more.
Anthropomorphic greenhouse gases are raising the temperature of the earth and threatening ecosystems. Since 1950 atmospheric carbon dioxide has increased 28%, while methane has increased 70%. Methane, over the first 20 years after release, has 80-times more warming potential as a greenhouse gas than carbon dioxide. Enteric methane from microbial fermentation of plant material by ruminants contributes 30% of methane released into the atmosphere, which is more than any other single source. Numerous strategies were reviewed to quantify their methane mitigation potential, their impact on animal productivity and their likelihood of adoption. The supplements, 3-nitrooxypropanol and the seaweed, Asparagopsis, reduced methane emissions by 40+% and 90%, respectively, with increases in animal productivity and small effects on animal health or product quality. Manipulation of the rumen microbial population can potentially provide intergenerational reduction in methane emissions, if treated animals remain isolated. Genetic selection, vaccination, grape marc, nitrate or biochar reduced methane emissions by 10% or less. Best management practices and cattle browsing legumes, Desmanthus or Leucaena species, result in small levels of methane mitigation and improved animal productivity. Feeding large amounts daily of ground wheat reduced methane emissions by around 35% in dairy cows but was not sustained over time. Full article
(This article belongs to the Special Issue Methane Production in Ruminants, Enteric, and Manure Emissions)
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