Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Overview of Metabolism01:40

Overview of Metabolism

37.4K
Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
37.4K
Microorganisms in Agriculture and Food industry01:27

Microorganisms in Agriculture and Food industry

1.1K
Microorganisms play a crucial role in agriculture and the food industry, contributing to soil fertility, crop protection, and food production. Their functions range from nitrogen fixation and biopesticide production to fermentation and food preservation, making them indispensable to sustainable farming and food safety.Role in AgricultureNitrogen-fixing bacteria, such as Rhizobium (symbiotic) and Azotobacter (free-living), convert atmospheric nitrogen into ammonia through biological nitrogen...
1.1K
Environmental Applications of Microorganisms01:30

Environmental Applications of Microorganisms

819
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
819
Overview of Archaea01:29

Overview of Archaea

635
Archaea, named after the Archaean eon, represent a unique domain of life, distinct from bacteria and eukaryotes, with remarkable traits. Their cellular and molecular features, ecological adaptability, and industrial relevance highlight their importance in understanding life processes and leveraging biotechnology.Cellular and Molecular CharacteristicsA defining feature of archaea is their unique membrane composition. Archaeal membranes contain ether-linked isoprenoid lipids, which confer...
635
Overview of Nitrogen Metabolism01:20

Overview of Nitrogen Metabolism

10.8K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of  ammonia, ammonium ions, nitrate, nitrite, or  nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
10.8K
Production Efficiency01:01

Production Efficiency

18.0K
Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
18.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Evaluation and development of prediction models for enteric methane emissions from cattle in India.

Journal of dairy science·2026
Same author

Elevated in-stream CO<sub>2</sub> concentration stimulates net-N<sub>2</sub>O production from global fluvial ecosystems.

Water research·2025
Same author

Defatted black soldier fly larvae meal as a substitute of soybean meal in dairy cow diets.

Animal : an international journal of animal bioscience·2025
Same author

From data to insights: Upscaling riverine GHG fluxes in Germany with machine learning.

The Science of the total environment·2024
Same author

Nitrogen excretion and utilisation of dairy cows grazing temperate semi-natural grasslands.

Animal : an international journal of animal bioscience·2024
Same author

Behavioural responses of beef cattle to different grazing systems and the influence of these responses on water productivity of livestock in a tropical savannah.

Animal : an international journal of animal bioscience·2024

Related Experiment Video

Updated: Dec 25, 2025

The Use of an Automated System GreenFeed to Monitor Enteric Methane and Carbon Dioxide Emissions from Ruminant Animals
11:02

The Use of an Automated System GreenFeed to Monitor Enteric Methane and Carbon Dioxide Emissions from Ruminant Animals

Published on: September 7, 2015

22.8K

Severe below-maintenance feed intake increases methane yield from enteric fermentation in cattle.

J P Goopy1,2, D Korir1,2, D Pelster3

  • 1Mazingira Centre, International Livestock Research Institute (ILRI), Mazingira, Nairobi30709, Kenya.

The British Journal of Nutrition
|March 27, 2020
PubMed
Summary

Enteric methane (CH4) production in cattle decreases with lower feed intake, but methane yield increases under severe undernutrition. This suggests revising emission factors for ruminants facing seasonal nutritional deficits.

Keywords:
Enteric fermentationSub-Saharan AfricaSub-maintenance feedingYm

More Related Videos

Author Spotlight: Advancing Anaerobic Microbiota Research Using a Novel Respirometry Protocol
06:11

Author Spotlight: Advancing Anaerobic Microbiota Research Using a Novel Respirometry Protocol

Published on: April 26, 2024

1.7K
Lab-Scale Model to Evaluate Odor and Gas Concentrations Emitted by Deep Bedded Pack Manure
06:52

Lab-Scale Model to Evaluate Odor and Gas Concentrations Emitted by Deep Bedded Pack Manure

Published on: July 19, 2018

6.7K

Related Experiment Videos

Last Updated: Dec 25, 2025

The Use of an Automated System GreenFeed to Monitor Enteric Methane and Carbon Dioxide Emissions from Ruminant Animals
11:02

The Use of an Automated System GreenFeed to Monitor Enteric Methane and Carbon Dioxide Emissions from Ruminant Animals

Published on: September 7, 2015

22.8K
Author Spotlight: Advancing Anaerobic Microbiota Research Using a Novel Respirometry Protocol
06:11

Author Spotlight: Advancing Anaerobic Microbiota Research Using a Novel Respirometry Protocol

Published on: April 26, 2024

1.7K
Lab-Scale Model to Evaluate Odor and Gas Concentrations Emitted by Deep Bedded Pack Manure
06:52

Lab-Scale Model to Evaluate Odor and Gas Concentrations Emitted by Deep Bedded Pack Manure

Published on: July 19, 2018

6.7K

Area of Science:

  • Animal Science
  • Environmental Science
  • Agricultural Science

Background:

  • Enteric methane (CH4) production in ruminants is typically linear with feed intake at production levels.
  • Ruminants in tropical systems often experience feed intake below maintenance during dry seasons.
  • The CH4 production-feed intake relationship under severe undernutrition is not well understood.

Purpose of the Study:

  • To investigate the effect of undernutrition on apparent digestibility, rumen turnover, and enteric CH4 production in cattle.
  • To explore how reduced feed intake, below maintenance levels, alters CH4 production and yield.
  • To assess the implications for methane emission factors in tropical livestock systems.

Main Methods:

  • A 4x4 Latin square design study was conducted with Boran yearling steers (n=12).
  • Animals were fed a tropical forage diet at varying levels from 1.0 to 0.4 of their maintenance energy requirement.
  • Measurements included apparent digestibility, rumen turnover rate, and enteric CH4 production.

Main Results:

  • Enteric CH4 production per day significantly decreased as feed intake fell (1133.3 to 65.0 g CH4/d).
  • However, CH4 yield (g CH4/kg DM intake) increased from 29.0 to 31.2.
  • The CH4 conversion factor (Ym) also increased from 9.1 to 10.1 MJ CH4/MJ gross energy intake as intake decreased.

Conclusions:

  • The relationship between feed intake and CH4 production is altered under severe undernutrition.
  • Increased CH4 yield and conversion factor at low feed intakes may be due to changes in nutrient partitioning.
  • Emission factors for ruminants in regions with seasonal nutritional deficits may need revision, with potential environmental and financial benefits from improved feeding strategies.