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Feedlot of lambs fed biodiesel co-products: performance, commercial cuts and economic evaluation

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Abstract

The aim of this study was to evaluate the animal performance, commercial cuts, and their yields within the production system, and economics of sheep production, of lambs finished in feedlots and fed with or without biodiesel co-products. A total of 40 lambs were divided into four biodiesel co-product treatment groups: a no-treatment control; peanut meal; crude glycerin; and peanut meal + crude glycerin. Animal performance did not differ (P > 0.05) among the treatment groups, where the average daily gain was close to 0.26 kg/day. Likewise, the quantitative carcass characteristics did not differ (P > 0.05) and the biological mean yield was 54.92%. Similarly, the commercial cuts and their yields did not differ (P ≥ 0.09) among the treatments. These results took into consideration the standard, age, and slaughter body weight of the animals. The economic evaluation determined that peanut meal was the best co-product for use in finishing lambs in a feedlot. Hence, all the biodiesel co-products evaluated can be used at feedlots to finish lambs without changing the variables measured.

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Funding

The authors thank São Paulo Research Foundation (FAPESP; grant #2013/23495-5) for providing financial support. E.P. Romanzini received a scholarship from the National Council of Technological and Scientific Development (CNPq; grant #131978/2014-4). R.L. Valença received a scholarship from the Brazilian Federal Coordination of Higher Education (CAPES). T.H. Borghi and P.A. Bernardes received a scholarship from FAPESP (grants #2012/25250-7 and #2013/09364-5, respectively). N. Andrade received a scholarship from CNPq (grant #142283/2014-2).

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Authors and Affiliations

  1. Department of Animal Science, School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil

    Eliéder Prates Romanzini, Américo Garcia da Silva Sobrinho, Roberta de Lima Valença, Thiago Henrique Borghi & Nomaiací de Andrade

  2. Department of Exact Science, School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil

    Priscila Arrigucci Bernardes

Authors
  1. Eliéder Prates Romanzini
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  2. Américo Garcia da Silva Sobrinho
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  3. Roberta de Lima Valença
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  4. Thiago Henrique Borghi
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  5. Nomaiací de Andrade
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  6. Priscila Arrigucci Bernardes
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Corresponding author

Correspondence to Eliéder Prates Romanzini.

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Statement of animal rights

All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. The protocol used in this experiment was in accordance with the National Council for Animal Experiments Control (CONCEA) guidelines and was approved by the Ethics Committee on Animal Use (CEUA) of FCAV-Unesp/Jaboticabal Campus (Protocol #022014/13).

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The authors declare that they have no conflicts of interest.

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Romanzini, E.P., da Silva Sobrinho, A.G., de Lima Valença, R. et al. Feedlot of lambs fed biodiesel co-products: performance, commercial cuts and economic evaluation. Trop Anim Health Prod 50, 155–160 (2018). https://doi.org/10.1007/s11250-017-1416-3

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