Abstract
Worldwide, dairy sector consumes 19% of the water in the livestock sector. However, in Latin America, the amount of water used in this sector is unknown, especially in arid zones. On the other hand, water footprint (WF) is a methodology to estimate the use of water to produce a product. The aim of this work was to estimate the WF of dairy production in the arid zone of the Peruvian central coast. Data from five dairy farms were used. The WF was calculated in its three dimensions: green water, blue water and grey water. In addition, the WF was measured for categories: feed, drinking and service. To measure the WF of feed production, the CROPWAT software was used, whilst the NRC (2001) equations were used to estimate the drinking water. The reference unit was cubic metres per kilogram of fat and protein corrected milk (FPCM). In average, 99% of the WF comes from feed production, followed by drinking water (0.4%). From the three dimensions of the WF, green water is responsible of 60% of the WF, followed by the blue water (30%). Imported water represented 63% of the WF. In general, WF of dairy production in these systems was 0.66 m3/kg FPCM. In conclusion, feed production, as the main source of WF from which most is imported, shows the possibility of reducing the WF of these systems by prioritizing and optimizing water consumption by crops using local resources with lower water requirements.
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Data availability
The datasets generated during the current study are available on reasonable request.
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Acknowledgements
To the farmers of the “Villa Agraria” association for providing the data needed for this study.
Funding
This study was funded by El Programa Nacional de Investigación Científica y Estudios Avanzados — PROCIENCIA within the framework of the “Proyecto de Mejoramiento y Ampliación de los Servicios del Sistema Nacional de Ciencia Tecnología e Innovación Tecnológica” (Contract No. 016–2019).
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Conceptualization: Velarde-Guillén, J.; Viera, M.; Gómez, C. Methodology: Velarde-Guillén, J.; Viera, M.; Gómez, C. Material preparation and data collection: Viera, M. Formal analysis and investigation: Velarde-Guillén, J. Writing original draft preparation: Velarde-Guillén, J.; Viera, M.; Gómez, C. Writing—review and editing: Velarde-Guillén, J.; Viera, M.; Gómez, C. Funding acquisition: Gómez, C. Supervision: Gómez, C.
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Velarde-Guillén, J., Viera, M. & Gómez, C. Water footprint of small-scale dairy farms in the central coast of Peru. Trop Anim Health Prod 55, 25 (2023). https://doi.org/10.1007/s11250-022-03437-8
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DOI: https://doi.org/10.1007/s11250-022-03437-8