Stefan Muetzel
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View article: Methanogenesis inhibition remodels microbial fermentation and stimulates acetogenesis in ruminants
Methanogenesis inhibition remodels microbial fermentation and stimulates acetogenesis in ruminants Open
Rumen microbiota enable ruminants to grow on fibrous plant materials, but also produce methane, driving 5% of global greenhouse gas emissions and leading to a loss of gross energy content. Methanogenesis inhibitors such as 3-nitrooxypropan…
View article: Milk fatty acids and rumen composition as proxy measures of enteric methane
Milk fatty acids and rumen composition as proxy measures of enteric methane Open
Genomic selection is a powerful tool to reduce methane emissions in ruminants. However, it requires large-scale on-farm phenotypic measures of methane. Current technologies to measure methane emissions have several limitations and may not …
View article: Methane inhibition in sheep fed <i>Asparagopsis armata</i> and Mootral™
Methane inhibition in sheep fed <i>Asparagopsis armata</i> and Mootral™ Open
View article: Feed additives for methane mitigation: Recommendations for identification and selection of bioactive compounds to develop antimethanogenic feed additives
Feed additives for methane mitigation: Recommendations for identification and selection of bioactive compounds to develop antimethanogenic feed additives Open
Despite the increasing interest in developing antimethanogenic additives to reduce enteric methane (CH4) emissions and the extensive research conducted over the last decades, the global livestock industry has a very limited numb…
View article: Feed additives for methane mitigation: A guideline to uncover the mode of action of antimethanogenic feed additives for ruminants
Feed additives for methane mitigation: A guideline to uncover the mode of action of antimethanogenic feed additives for ruminants Open
This publication aims to provide guidelines of the knowledge required and the potential research to be conducted in order to understand the mode of action of antimethanogenic feed additives (AMFA). In the first part of the paper, we classi…
View article: Effect of buffer <scp>pH</scp> on methane production and fermentation characteristics of three forages tested <i>in vitro</i>
Effect of buffer <span>pH</span> on methane production and fermentation characteristics of three forages tested <i>in vitro</i> Open
BACKGROUND Low rumen pH is proposed to be a major mechanism for low methane (CH 4 ) emissions from sheep fed forage rape. However, it is difficult to separate this from other in vivo factors, such as rumen passage rate. The objective of th…
View article: Prediction of enteric methane emissions by sheep using an intercontinental database
Prediction of enteric methane emissions by sheep using an intercontinental database Open
Enteric methane (CH) emissions from sheep contribute to global greenhouse gas emissions from livestock. However, as already available for dairy and beef cattle, empirical models are needed to predict CH emissions from sheep for accounting …
View article: Moringa oleifera L.: A Potential Plant for Greenhouse Gas Mitigation in Temperate Agriculture Systems
Moringa oleifera L.: A Potential Plant for Greenhouse Gas Mitigation in Temperate Agriculture Systems Open
The earth’s climate is changing because of the increase in greenhouse gas (GHG) concentration, to which livestock is a major contributor. Methane produced from cattle can be reduced by using high quality forages. This study compared the GH…
View article: New temperate seaweed targets for mitigation of ruminant methane emissions: an in vitro assessment
New temperate seaweed targets for mitigation of ruminant methane emissions: an in vitro assessment Open
Methane is a potent greenhouse gas with a comparatively short (9 yr) atmospheric lifetime; therefore effective strategies for methane mitigation will contribute significantly to meeting the UN Sustainable Development Goal #13 of taking rap…
View article: Tailored Nanoparticles With the Potential to Reduce Ruminant Methane Emissions
Tailored Nanoparticles With the Potential to Reduce Ruminant Methane Emissions Open
Agricultural methane produced by archaea in the forestomach of ruminants is a key contributor to rising levels of greenhouse gases leading to climate change. Functionalized biological polyhydroxybutyrate (PHB) nanoparticles offer a new con…
View article: Condensed Tannins in White Clover (Trifolium repens) Foliar Tissues Expressing the Transcription Factor TaMYB14-1 Bind to Forage Protein and Reduce Ammonia and Methane Emissions in vitro
Condensed Tannins in White Clover (Trifolium repens) Foliar Tissues Expressing the Transcription Factor TaMYB14-1 Bind to Forage Protein and Reduce Ammonia and Methane Emissions in vitro Open
Grazing ruminants contribute to global climate change through enteric methane and nitrous oxide emissions. However, animal consumption of the plant polyphenolics, proanthocyanidins, or condensed tannins (CTs) can decrease both methane emis…
View article: New temperate seaweed targets for mitigation of ruminant methane emissions: an in vitro assessment
New temperate seaweed targets for mitigation of ruminant methane emissions: an in vitro assessment Open
Methane is a potent greenhouse gas with a comparatively short (9 yr) atmospheric lifetime; therefore effective strategies for methane mitigation will contribute significantly to meeting the UN Sustainable Development Goal #13 of taking rap…
View article: Effect of Divergent Feeding Regimes During Early Life on the Rumen Microbiota in Calves
Effect of Divergent Feeding Regimes During Early Life on the Rumen Microbiota in Calves Open
The objective of this study was to determine whether divergent feeding regimes during the first 41 weeks of the life of a calf are associated with long-term changes in the rumen microbiota and the associated fermentation end-products. Twen…
View article: Effect of Methane Inhibitors on Ruminal Microbiota During Early Life and Its Relationship With Ruminal Metabolism and Growth in Calves
Effect of Methane Inhibitors on Ruminal Microbiota During Early Life and Its Relationship With Ruminal Metabolism and Growth in Calves Open
The present study aimed to determine whether dietary supplementation with methanogen inhibitors during early life may lead to an imprint on the rumen microbial community and change the rumen function and performance of calves to 49-weeks o…
View article: EFFECT OF LERAK (SAPINDUS RARAK) EXTRACT IN HIGH ROUGHAGE DIET ON RUMEN MICROBIAL PROTEIN SYNTHESIS AND PERFORMANCE OF SHEEP
EFFECT OF LERAK (SAPINDUS RARAK) EXTRACT IN HIGH ROUGHAGE DIET ON RUMEN MICROBIAL PROTEIN SYNTHESIS AND PERFORMANCE OF SHEEP Open
Secondary compounds containing plant extract as feed additive may improve the performance of livestock consuming high roughage diet. An in vivo trial was conducted to investigate the effect of Sapindus rarak extract (SRE)…
View article: In vitro gas production and rumen fermentation profile of fresh and ensiled genetically modified high–metabolizable energy ryegrass
In vitro gas production and rumen fermentation profile of fresh and ensiled genetically modified high–metabolizable energy ryegrass Open
We previously generated a high-metabolizable energy (HME) perennial ryegrass (Lolium perenne) by genetically modifying the plant to increase the leaf lipid content. Although substantial progress has been made toward characterizing physiolo…
View article: Milk production responses and rumen fermentation of dairy cows supplemented with summer brassicas
Milk production responses and rumen fermentation of dairy cows supplemented with summer brassicas Open
View article: Naturally Produced Lovastatin Modifies the Histology and Proteome Profile of Goat Skeletal Muscle
Naturally Produced Lovastatin Modifies the Histology and Proteome Profile of Goat Skeletal Muscle Open
Enteric methane formation in ruminants is one of the major contributors to climate change. We have reported that supplementation of naturally produced lovastatin reduced methane emissions in goats without adversely affecting rumen fermenta…
View article: Uncertainties in enteric methane inventories and measurement techniques
Uncertainties in enteric methane inventories and measurement techniques Open
View article: Symposium review: Uncertainties in enteric methane inventories, measurement techniques, and prediction models
Symposium review: Uncertainties in enteric methane inventories, measurement techniques, and prediction models Open
Ruminant production systems are important contributors to anthropogenic methane (CH4) emissions, but there are large uncertainties in national and global livestock CH4 inventories. Sources of uncertainty in enteric CH…
View article: Effect of dietary fish oil supplements alone or in combination with sunflower and linseed oil on ruminal lipid metabolism and bacterial populations in lactating cows
Effect of dietary fish oil supplements alone or in combination with sunflower and linseed oil on ruminal lipid metabolism and bacterial populations in lactating cows Open
Fish oil (FO) alters ruminal biohydrogenation causing trans fatty acid (FA) intermediates to accumulate, but the effects of 18-carbon polyunsaturated FA supply on ruminal long-chain FA metabolism and microbial communities in cattle fed FO …
View article: Updated predictions of enteric methane emissions from sheep suitable for use in the New Zealand national greenhouse gas inventory
Updated predictions of enteric methane emissions from sheep suitable for use in the New Zealand national greenhouse gas inventory Open
Enteric methane (CH4) emissions make up approximately one-third of all New Zealand’s carbon dioxide equivalent greenhouse gas emissions. In current national inventory calculations, fixed values are used to estimate emissions from sheep; 20…
View article: Does Dietary Mitigation of Enteric Methane Production Affect Rumen Function and Animal Productivity in Dairy Cows?
Does Dietary Mitigation of Enteric Methane Production Affect Rumen Function and Animal Productivity in Dairy Cows? Open
It has been suggested that the rumen microbiome and rumen function might be disrupted if methane production in the rumen is decreased. Furthermore concerns have been voiced that geography and management might influence the underlying micro…
View article: Methane emissions from sheep fed fresh pasture
Methane emissions from sheep fed fresh pasture Open
Methane emissions from ruminants are the major single source of greenhouse gases in New Zealand and considerable effort has gone into the measurement and prediction of these emissions. This paper analyses methane emissions measured in resp…