Abstract
The cultivation of safflower for biofuel production can help to reduce dependence on fossil fuels and promote sustainable agriculture, particularly in semi-arid regions where water resources are limited or where other crops are not well-suited to the local climate and soil conditions. This study applied the Life Cycle Assessment (LCA) methodology to quantify the greenhouse gas (GHG) emissions associated with the farming of safflower seeds at an experimental plot located in Northeast Brazil (semi-arid region). The functional unit considered herein is the production of safflower seeds at a 5000 m2 area, considering one crop cycle (82 days). Simapro software was used, following ISO 14040 and ISO 14044, using the Ecoinvent database and environmental impact assessment method IPCC 2021 GWP 100y. The attributional LCA encompassed soil preparation, fertilization, irrigation, and harvesting. The GHG emissions associated with safflower seed production were 578.49 kg CO2-eq, and considering the productivity of 1185 kg of seeds, the specific emissions were 0.4882 kg CO2-eq/kg of safflower seed harvested. The highest emissions were associated with the preparation of soil (322.8 kg CO2-eq), followed by water consumption (115.52 kg CO2-eq), fertilization (109.16 kg CO2-eq), the harvest of seeds (23.52 kg CO2-eq), and finally the material composition of the irrigation system (7.50 kg CO2-eq). It was verified that tackling the GHG emissions associated with soil preparation and fertilization should be the focus of future research efforts to further reduce the emissions and increase the environmental competitiveness of safflower seeds as biofuel feedstock.
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The authors thank the National Council for Scientific and Technological Development (CNPq, productivity grant 309452/2021-0), and Foundation for the Support of Research in the State of Paraíba-FAPESQ-PB. We also thank the Ministry of Science, Technology and Innovation (Brazilian Government) for funding this scientific research.
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All authors contributed to the study conception, Material preparation and data collection were performed by RADS. Design and Analysis was carried out by MC. The first draft of the manuscript was written by RADS and MC, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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da Silva, R.A.D., dos Santos Albuquerque, N., Lichston, J.E. et al. Safflower seed production in semi-arid regions and greenhouse gas emissions. Int. J. Environ. Sci. Technol. (2024). https://doi.org/10.1007/s13762-024-05660-2
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DOI: https://doi.org/10.1007/s13762-024-05660-2