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

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Published on: September 7, 2015

Energy consumption in mixed crop-sheep farming systems: what factors of variation and how to decrease?

M Benoit¹, G Laignel

¹Institut National de la Recherche Agronomique, INRA, UR1213 Herbivores, Site de Theix, F-63122 Saint-Genès-Champanelle, France.

Animal : an International Journal of Animal Bioscience

|March 27, 2012

Summary

This summary is machine-generated.

Improving sheep-for-meat production energy efficiency (EE) is achievable through increased fodder self-sufficiency and ewe productivity. Optimizing farm practices, like removing nitrogen fertilizers, significantly reduces energy consumption and enhances EE.

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Area of Science:

Agricultural Science
Animal Science
Sustainable Agriculture

Background:

Growing concerns regarding energy resources and greenhouse gas emissions necessitate improved energy efficiency in livestock production.
Sheep-for-meat systems represent a significant area for potential energy savings and emission reductions.
Understanding the key drivers of energy consumption is crucial for developing sustainable sheep farming practices.

Purpose of the Study:

To assess the impact of key factors on energy efficiency in sheep-for-meat production.
To identify and evaluate primary strategies for enhancing energy efficiency in these systems.
To model the energy balance of sheep production systems to guide improvements.

Main Methods:

Utilized a modeling approach to simulate sheep-for-meat production systems, including an energy balance calculation module.
Analyzed four typological groups of farms in plainland areas to determine baseline energy efficiency.
Investigated the effects of specific adaptations (feed self-sufficiency, nitrogen fertilizer removal, biofuel production) on a mixed-farming system.

Main Results:

The 'Graze' system exhibited the highest energy efficiency (EEs = 0.62) with the lowest fuel requirements per kg carcass (1.47).
The 'sheep and cash crop' system showed the lowest EEs (0.36) and highest fuel requirements per kg carcass (2.54).
Removing nitrogen fertilizers in a mixed-farming system dramatically improved EEs from 0.42 to 0.93, reducing fuel requirements from 2.2 to 0.98 FuReq/kg carcass.

Conclusions:

High fodder self-sufficiency (low concentrate use) and high ewe productivity are critical factors for improving energy efficiency in sheep-for-meat production.
Optimizing farm management, particularly reducing reliance on external inputs like nitrogen fertilizers, offers substantial energy savings.
While ewe productivity and lamb weight positively impact energy efficiency, flock size over 1000 ewes shows diminishing returns for energy-related economies of scale.