Partial replacement of soybean meal with different protein sources in piglet feed during the nursery phase

• Published in: Asian-australasian journal of animal sciences Vol. 32; no. 11; p. 1725
• Main Authors: Genova, Jansller Luiz, Carvalho, Paulo Levi de Oliveira, De Oliveira, Newton Tavares Escocard, Oliveira, Aparecida da Costa, Gois, Franz Dias, Castro, Davi Elias de Sa e, Souza, Fabio Nicory Costa, Trautenmuller, Heloise, de Azevedo dos Santos, Liliana Bury, Leal, Isabela Ferreira
• Format: Journal Article
• Language: English
• Published: Asian - Australasian Association of Animal Production Societies 01-11-2019
• Subjects: Animal experimentation; Body weight; EDTA; Glucose; Legal fees; Soybeans; Urea; Brazil
• ISSN: 1011-2367
• DOI: 10.5713/aias.17.0753

Objective: Evaluate the partial replacement of soybean meal with different protein sources in piglet feed during the nursery phase in terms of digestibility of feed, nitrogen balance, growth performance and blood parameters. Methods: Experiment I involved 24 crossbred entire male pigs with an initial body weight (BW) of 18.28 [+ or -] 0.7 kg and used a randomized complete block design consisting of 3 treatments (fish meal, FM; soybean protein concentrate, SPC; and soybean meal, SBM) and 8 replicates, with 1 pig per experimental unit. Experiment II involved 1,843 crossbred male and female pigs with an initial BW of 6.79 [+ or -] 0.90 kg and was based on a completely randomized design with a 2x3 factorial arrangement (2 sexes and 3 protein sources) and 13 replicates. Results: The results of Exp. I indicate effects (p<0.05) of dietary protein sources on digestible protein (FM, 17.84%; SPC, 16.72%, and SBM, 18.13%) and on total nitrogen excretion (TNE, g/kg [BW.sup.0.75]/d) in which pigs fed with SBM-based feed had TNE values that were 5.36% and 3.72% greater than SPC and FM, respectively. In the Exp. II, there was difference (p<0.01) between sexes in the pre-starter I and starter phases, and total period in average daily feed intake (ADFI), which were greater in females, and between the protein sources, ADFI, final weight and daily weight gain. For urea in the pre-starter II and starter phases and glucose in the pre-starter II phase, there was a difference (p<0.05) between protein sources and between sexes, in starter phase in urea concentrations (females: 57.11 mg/dL and males: 50.60 mg/dL). Conclusion: The use of SBM as only protein source influences larger TNE (g/kg [BW.sup.0.75]/d), reduces the growth performance of piglets and increases plasma urea concentrations in prestarter II phase. Keywords: Nitrogen Balance; Growth Performance; Fish Meal; Blood Parameters; Soybean Protein Concentrate; Swine