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Research article - Peer-reviewed, 2021

Enteric methane mitigation strategies for ruminant livestock systems in the Latin America and Caribbean region: A meta-analysis

Congio, Guilhermo Francklin de Souza; Bannink, Andre; Mogollon, Olga Lucia Mayorga; Hristov, Alexander Nikolov;

Abstract

Latin America and Caribbean (LAC) is a developing region characterized for its importance for global food security, producing 23 and 11% of the global beef and milk production, respectively. The region's ruminant livestock sector however, is under scrutiny on environmental grounds due to its large contribution to enteric methane (CH4) emissions and influence on global climate change. Thus, the identification of effective CH4 mitigation strategies which do not compromise animal performance is urgently needed, especially in context of the Sustainable Development Goals (SDG) defined in the Paris Agreement of the United Nations. Therefore, the objectives of the current study were to: 1) collate a database of individual sheep, beef and dairy cattle records from enteric CH4 emission studies conducted in the LAC region, and 2) perform a meta-analysis to identify feasible enteric CH4 mitigation strategies, which do not compromise animal performance. After outlier's removal, 2745 animal records (65% of the original data) from 103 studies were retained (from 2011 to 2021) in the LAC database. Potential mitigation strategies were classified into three main categories (i.e., animal breeding, dietary, and rumen manipulation) and up to three subcategories, totaling 34 evaluated strategies. A random effects model weighted by inverse variance was used (Comprehensive Meta-Analysis V3.3.070). Six strategies decreased at least one enteric CH4 metric and simultaneously increased milk yield (MY; dairy cattle) or average daily gain (ADG; beef cattle and sheep). The breed composition F1 Holstein x Gyr decreased CH4 emission per MY (CH4IMilk) while increasing MY by 99%. Adequate strategies of grazing management under continuous and rotational stocking decreased CH4 emission per ADG (CH4IGain) by 22 and 35%, while increasing ADG by 22 and 71%, respectively. Increased dietary protein concentration, and increased concentrate level through cottonseed meal inclusion, decreased CH4IMilk and CH4IGain by 10 and 20% and increased MY and ADG by 12 and 31%, respectively. Lastly, increased feeding level decreased CH4IGain by 37%, while increasing ADG by 171%. The identified effective mitigation strategies can be adopted by livestock producers according to their specific needs and aid LAC countries in achieving SDG as defined in the Paris Agreement.

Keywords

Enteric methane; Mitigation; Cattle; Sheep; Greenhouse gas emissions; Global warming

Published in

Journal of Cleaner Production

2021, volume: 312, article number: 127693

Authors' information

Congio, Guilhermo Francklin de Souza
Universidade de Sao Paulo
Bannink, Andre
Wageningen University and Research
Mogollon, Olga Lucia Mayorga
Corporacion Colombiana de Investigacion Agropecuaria, AGROSAVIA
Hristov, Alexander Nikolov
Pennsylvania State University
Jaurena, Gustavo
University of Buenos Aires
Swedish University of Agricultural Sciences, Department of Animal Nutrition and Management
Astigarraga, Laura
University of the Republic

Sustainable Development Goals

SDG13 Climate action

UKÄ Subject classification

Environmental Sciences
Animal and Dairy Science

Publication Identifiers

DOI: https://doi.org/10.1016/j.jclepro.2021.127693

URI (permanent link to this page)

https://res.slu.se/id/publ/112312