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Use of unconventional agro-industrial by-products for supplementation of grazing dairy cattle in the Peruvian Amazon region

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Abstract

The effect of supplementation of grazing cattle with unconventional agro-industrial by-products on milk production and economic performance was evaluated in the Amazon region of Peru. Ten lactating cows were used in a simple crossover design with two periods of 21 days (11 days of adaptation and 10 days of measurements), and two treatments: conventional supplementation (rice polishing) and a mixture of unconventional agro-industrial by-products—MUABP (rice polishing, rice middling, cocoa hull, and coconut meal). Cattle supplemented with MUABP produced more milk than those fed the conventional supplement (10.2 vs. 8.8 kg/cow/day, p <0.001). No differences were found between the two treatments in protein, fat, or lactose content of milk (3.9%, 3.17%, 4.54% on average respectively; p ≥0.05). Daily weight gain with the MUABP treatment was 0.09 kg/day, while with conventional supplementation cow lost −0.04 kg/day (p =0.01). Body condition did not differ between treatments (p ≥0.05). Income due to supplementation with unconventional agro-industrial by-product was US $0.2 in comparison with only rice polishing. Cattle supplemented with MUABP improved milk production and their economic profitability.

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All authors ensure that all data and materials support the findings and comply with field standards.

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Funding

The authors would like to acknowledge the support from PNIA/INIA project no. 016-2016 (Instituto Nacional de Innovación Agraria-INIA) “Nutritional strategic supplementation for livestock in San Martin and Amazonas region through multi nutritionals blocks and local residues as strategies to climate change adaptation” and to Dra. Isabel Molina Botero, Post-doctoral researcher funded by Project Incorporacion de Investigadores: Cambio climático y ganadería en el Perú: Mitigación y adaptación (CONCYTEC-World Bank) for her careful editing of this paper.

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Conceptualization: Hidalgo, V.; Gamarra, S.; Roque, R.; Gomez, C. Methodology: Hidalgo, V.; Roque R.; Gomez, C.; Fernandez, M.; Godoy, D. Formal analysis and investigation: Gonzalez, J.; Roque, R.; Gamarra, S.; Fernandez, M.; Godoy, D.; Hidalgo, V. Writing—original draft preparation: Godoy, D.; Fernandez, M. Writing—review and editing: Godoy, D.; Gomez, C. Funding acquisition: Hidalgo, V.; Gamarra, S.; Gomez, C. Resources: Roque, R.; Godoy, D.; Fernandez, M. Supervision: Hidalgo, V.; Gamarra, S.; Gomez, C.; Roque, R.

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Correspondence to Carlos Gómez.

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The animals were cared in accordance with Peru’s Law on Animal Protection and Welfare, No. 30407.

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Godoy, D., Gonzales, J., Roque, R. et al. Use of unconventional agro-industrial by-products for supplementation of grazing dairy cattle in the Peruvian Amazon region. Trop Anim Health Prod 53, 294 (2021). https://doi.org/10.1007/s11250-021-02718-y

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