The Reduction of Crude Protein with the Supplementation of Amino Acids in the Diet Reduces the Environmental Impact of Growing Pigs Production Evaluated through Life Cycle Assessment

Lucas A. C. Esteves, Alessandra N. T. R. Monteiro, Natália Y. Sitanaka, Paula C. Oliveira, Leandro D. Castilha, Vinicius R. C. Paula and Paulo C. Pozza
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Lucas A. C. Esteves: Department of Animal Science, State University of Maringa, Maringá 87020-900, PR, Brazil
Alessandra N. T. R. Monteiro: ANIMINE SAS, 74960 Sillingy, France
Natália Y. Sitanaka: Department of Animal Science, State University of Maringa, Maringá 87020-900, PR, Brazil
Paula C. Oliveira: Department of Animal Science, State University of Maringa, Maringá 87020-900, PR, Brazil
Leandro D. Castilha: Department of Animal Science, State University of Maringa, Maringá 87020-900, PR, Brazil
Vinicius R. C. Paula: Department of Animal Science, Luiz de Queiroz College of Agriculture, University of Sao Paulo, Piracicaba 13418-900, SP, Brazil
Paulo C. Pozza: Department of Animal Science, State University of Maringa, Maringá 87020-900, PR, Brazil

Sustainability, 2021, vol. 13, issue 9, 1-14

Abstract: Two experiments were performed to determine the digestibility of diets with crude protein (CP) reduction supplemented with amino acids (18.15; 17.15; 16.15 and 15.15%) to growing pigs (30–50 kg), to assess the use of nutrients and account for the manure excretion, and to evaluate the performance, backfat thickness, Longissimus lumborum depth, and plasma urea, aiming to evaluate the environmental impact through life cycle assessment (LCA); for the first time in Brazil interacting experiments were developed to evaluate the CP reduction and LCA. The CP reduction resulted in greater daily weight gain ( p = 0.011), final weight ( p = 0.020), better use of N and P, through the greater N and P retained ( p = 0.003 and p = 0.017, respectively). There was a linear reduction in acidification potential ( p = 0.015), eutrophication potential ( p = 0.001), and land occupation ( p = 0.005) when dietary CP decreased from 18.15 to 15.15%. The reduction in CP and supplementation of amino acids in diets for growing pigs (30–50 kg) improved final and daily weight gain. Through LCA, and performance and metabolism data, it was concluded that for the acidification, eutrophication and land occupation categories, impacts were reduced as the protein concentration was reduced.

Keywords: acidification; nitrogen; swine (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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