Integrating or Des-integrating agribusiness systems: Outcomes of emergy evaluation.

The agribusiness contributes significantly to the Brazilian domestic production, and the search for environmentally friendly systems, exploring the maximum possible use of renewable resources and reducing the use of non-renewable ones, affects the agribusiness' productivity and competitivity. An agribusiness producing corn, eggs, pork and milk was evaluated using emergy accounting. The effects of the (des)integration of the production processes on the efficiency and environmental sustainability of the system were assessed using seven scenarios. The first is the existing integrated system and the others are scenarios in which one of the productive subsystems is removed. Efficiency is measured by the global productivity relative to the amount of protein produced. The most environmentally advantageous scenario, in terms of sustainability and productivity, is the one in which pork production is increased and egg production is ceased. This result suggests that increasing integration per se cannot assure gains in environmental sustainability. The integrated management of the residues of the poultry and pig production as organic fertilizer resulted an advantage for the seven scenarios. The scenarios presented should help to evaluate organizational innovations and to identify trade-offs that could influence the environmental performance of agricultural integrated systems. (Des) Integrating different agricultural production systems Unlabelled Image • The benefits of integration in a crop-livestock system was evaluated through emergy synthesis. • Efficiency evaluation of the (des)-integration of corn, eggs, pork and milk production was calculated. • Seven scenarios studied: the integrated existing system and scenarios in which one of the productive subsystems is removed. • The trade-offs between the sustainability and productivity were highlighted and discussed. • The increase of systems/processes to be integrated does not guarantee the best environmental performance. [ABSTRACT FROM AUTHOR]