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

Abstract

ObjectiveEvaluate 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.MethodsExperiment I involved 24 crossbred entire male pigs with an initial body weight (BW) of 18.28±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±0.90 kg and was based on a completely randomized design with a 2×3 factorial arrangement (2 sexes and 3 protein sources) and 13 replicates.ResultsThe 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 BW0.75/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).ConclusionThe use of SBM as only protein source influences larger TNE (g/kg BW0.75/d), reduces the growth performance of piglets and increases plasma urea concentrations in pre-starter II phase.

Efeitos de dietas com baixo e alto teor de proteína bruta suplementadas até o quarto aminoácido limitante para dois cruzamentos comerciais de leitões iniciantes

“…According to Moreira et al (2004), feeding programs focus on increasing the use of amino acids and reducing N excretion. Piglets fed HCP showed higher absorbed N, which may be explained by better usage of protein compounds with reduced urea synthesis (Genova et al, 2019). Even though N retention was not increased in these animals.…”

“…The increased activity of urea cycle enzymes is essential to convert ammonia, generated during oxidative deamination of protein metabolites, into urea. Therefore, higher PUC could be a result of increased dietary protein concentration (Genova et al, 2019).…”

Potential impacts of guava seed meal on piglet feeding as a dietary fibre alternative

“…The reference concentrations of urea and glucose established for pigs are 15-45 mg/dL and 60-110 mg/dL, respectively (Genova et al 2019). It can be observed that the urea values are close to the established range, but for the glucose concentration the levels were higher than those in the range, even with diets formulated to meet the animal phase requirements.…”

Statistical assessment of feeding corn with higher oil content to piglets in the starter phase

“…Model 4 was nearly the equivalent of Model 3 by this criterion for the analysis of gain and was preferred for the analyses of FCR and FBW. Other assessments of growth performance by pigs included covariates in the statistical models that were used to analyse the data (Oliveira et al, 2018;Genova et al, 2019;Oliveira et al, 2019). Additionally, the use covariates in statistical models to control the experimental error could minimize the number of experimental units required for robust experimentation (Jacobs et al, 2013).…”