Article (Scientific journals)
Integrated crop and livestock systems increase both climate change adaptation and mitigation capacities.
Delandmeter, Mathieu; de Faccio Carvalho, Paulo César; Bremm, Carolina et al.
2023In Science of the Total Environment, 912, p. 169061
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Keywords :
Climate change; Crop model; Integrated crop-livestock systems; Productivity; Resistance; Soil organic carbon
Abstract :
[en] Integrated crop-livestock systems (ICLS) are proposed as key solutions to the various challenges posed to present-day agriculture which must guarantee high and stable yields while minimizing its impacts on the environment. Yet the complex relationships between crops, grasslands and animals on which they rely demand careful and precise management. In this study, from a 18-year ICLS field experiment in Brazil, that consists in annual no-till soybean-pastures grazed by beef cattle, we investigated the impacts of contrasted pastures grazing intensities (defined by sward heights of 10, 20, 30 and 40 cm, plus an ungrazed treatment) on the agroecosystem productivity and soil organic carbon (SOC) under both historical and future (2040-2070, RCP8.5) climatic conditions. We used an innovative methodology to model the ICLS with the STICS soil-crop model, which was validated with field observations. Results showed that the total system production increased along with grazing intensity because of higher stocking rates and subsequent live weight gains. Moderate and light grazing intensities (30 and 40 cm sward heights) resulted in the largest increase in SOC over the 18-year period, with all ICLS treatments leading to greater SOC contents than the ungrazed treatment. When facing climate change under future conditions, all treatments increased in productivity due to the CO2 fertilization effect and the increases in organic amendments that result from the larger stocking rate allowed by the increased pasture carrying capacity. Moderate grazing resulted in the most significant enhancements in productivity and SOC levels. These improvements were accompanied by increased resistance to both moderate and extreme climatic events, benefiting herbage production and live weight gain. Globally, our results show that adding a trophic level (i.e. herbivores) into cropping systems, provided that their carrying capacities are respected, proved to increase their ability to withstand climate change and to contribute to its mitigation.
Disciplines :
Agriculture & agronomy
Author, co-author :
Delandmeter, Mathieu  ;  Université de Liège - ULiège > TERRA Research Centre > Plant Sciences
de Faccio Carvalho, Paulo César;  Federal University of Rio Grande do Sul, Animal Science Research Program, Bento Gonçalves Avenue 7712, 91540-00 Porto Alegre, RS, Brazil
Bremm, Carolina;  Federal University of Rio Grande do Sul, Animal Science Research Program, Bento Gonçalves Avenue 7712, 91540-00 Porto Alegre, RS, Brazil
Dos Santos Cargnelutti, Carolina;  Federal University of Rio Grande do Sul, Animal Science Research Program, Bento Gonçalves Avenue 7712, 91540-00 Porto Alegre, RS, Brazil
Bindelle, Jérôme   ;  Université de Liège - ULiège > TERRA Research Centre > Animal Sciences (AS)
Dumont, Benjamin   ;  Université de Liège - ULiège > TERRA Research Centre > Plant Sciences
 These authors have contributed equally to this work.
Language :
English
Title :
Integrated crop and livestock systems increase both climate change adaptation and mitigation capacities.
Publication date :
06 December 2023
Journal title :
Science of the Total Environment
ISSN :
0048-9697
eISSN :
1879-1026
Publisher :
Elsevier BV, Netherlands
Volume :
912
Pages :
169061
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
WBI - Wallonie-Bruxelles International [BE]
CONFAP - Conselho Nacional das Fundações Estaduais de Amparo à Pesquisa [BR]
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