Articles

Assessing and interpreting food and land use efficiency by ruminants

Abstract

While animal-based foods account for 25% of the protein consumed by humans worldwide, and are recognized for their nutritional quality, livestock farming is regularly criticized for its inefficiency. In particular, the use of edible human food and arable land to produce food for animals raises questions. Numerous indicators have been developed to objectivize the contribution of livestock farming to human food supply: net protein and energy conversion efficiency, arable land use, land use ratio and net productivity. These indicators, which exist in a number of variants, are described, analyzed and evaluated on the basis of a compilation of various dairy and beef farm databases. The analysis demonstrates the value of many ruminant systems and identifies areas for improvement, in particular by basing systems on grass and reducing the use of human edible feed.

Authors


Alexandre MERTENS

a.mertens@cra.wallonie.be

Affiliation : CRA-W – Systèmes agricoles, B-6800, Libramont

Country : Belgium


Caroline BATTHEU-NOIRFALISE

https://orcid.org/0000-0003-3865-5195

Affiliation : CRA-W – Systèmes agricoles, B-6800, Libramont

Country : Belgium


Pauline MADRANGE

Affiliation : Institut de l’Élevage, 149 rue de Bercy, 75012, Paris

Country : France


Michaël MATHOT

Affiliation : CRA-W – Systèmes agricoles, B-6800, Libramont

Country : Belgium


Alice BERCHOUX

Affiliation : Institut de l’Élevage, 149 rue de Bercy, 75012, Paris

Country : France


René BAUMONT

Affiliation : Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, 63122, Saint-Genès-Champanelle

Country : France

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