Simultaneous determination of standardized ileal digestible tryptophan and lysine for barrows from 15 to 30kg live weight

Pasquetti, Tiago Júnior; Pozza, Paulo César; Moreira, Ivan; Santos, Tatiana Carlesso dos; Diaz-Huepa, Laura Marcela; Castilha, Leandro Dalcin; Perondi, Dani; Carvalho, Paulo Levi de Oliveira; Kim, S.W.

doi:10.1016/j.livsci.2015.09.021

Cited by 6 publications

(4 citation statements)

References 24 publications

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“…Remus et al [33] reported that higher protein utilization efficiency, obtained through precision feeding and, consequently, lower protein consumption, reduces the plasma urea concentration of growing pigs. On the other hand, Pasquetti et al [34] pointed out that an amino acid deficiency can also limit protein synthesis and increase deamination.…”

Section: Discussionmentioning

confidence: 99%

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

Esteves

Monteiro²,

Sitanaka

et al. 2021

Sustainability

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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.

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Section: Discussionmentioning

confidence: 99%

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

Esteves

Monteiro²,

Sitanaka

et al. 2021

Sustainability

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“…The treatments were arranged as a 4 × 4 factorial arrangement (four L-Ile (990 g/kg) b 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 The Journal of Agricultural Science levels of SID Trp: 1.55, 1.85, 2.15 and 2.45 g/kg diet; four levels of SID Lys: 9.72, 11.12, 12.52 and 13.92 g/kg diet) which provided Trp:Lys ratio from 11.1 to 25.2:100. The lowest levels of SID Trp and Lys in the basal diet, which were 1.55 and 9.72 g/kg, respectively, were previously determined in a digestibility assay, with basal diet and batches of ingredients used to mix these diets similar to those used in our study (Pasquetti et al, 2015). The crude protein content of the basal diet (165.2 g/kg diet) used in this study was reduced as compared to the 192.4 g/kg diet proposed by Rostagno et al (2011).…”

Section: Location Animals Experimental Design and Dietsmentioning

confidence: 71%

“…The treatments were arranged as a 4 × 4 factorial arrangement (four levels of SID Trp: 1.55, 1.85, 2.15 and 2.45 g/kg diet; four levels of SID Lys: 9.72, 11.12, 12.52 and 13.92 g/kg diet) which provided Trp:Lys ratio from 11.1 to 25.2:100. The lowest levels of SID Trp and Lys in the basal diet, which were 1.55 and 9.72 g/kg, respectively, were previously determined in a digestibility assay, with basal diet and batches of ingredients used to mix these diets similar to those used in our study (Pasquetti et al ., 2015).…”

Section: Methodsmentioning

confidence: 99%

Standardized ileal digestible tryptophan and lysine for 15–30 kg gilts

et al. 2020

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It was aimed to simultaneously study standardized ileal digestible (SID) tryptophan (Trp) and lysine (Lys) for gilts. A digestibility assay was previously conducted to determine the SID amino acid in the basal diet (low levels of SID Trp and Lys). Sixty-four gilts (15.04 ± 1.44 kg) were allotted to 16 diets in a 4 × 4 factorial arrangement (1.55, 1.85, 2.15 and 2.45 g/kg SID Trp and 9.72, 11.12, 12.52 and 13.92 g/kg SID Lys) with four replicates per treatment. Performance, longissimus muscle (LM), backfat thickness (BF) and blood variables were evaluated. An interaction was observed for G:F, and by response surface model, the optimum Trp level was achieved at 2.15 g/kg (0.159 g/MJ of ME). A quadratic effect of Trp was observed on body weight (BW) and average daily gain (ADG); the daily feed intake increased linearly as Trp increased. The optimum Trp levels of 2.25 and 2.24 g/kg were estimated for BW and ADG, respectively. The BF increased with increasing levels of Trp. There was a quadratic and linear effect of Trp and Lys, respectively, on the LM, in which the optimum Trp level was determined as 2.05 g/kg in the diet. Plasma urea nitrogen decreased as Trp and Lys levels increased. Using estimates provided by response surface, maximized G:F ratio was obtained at 2.15 g SID Trp/kg of diet and at least 13.92 g SID Lys/kg of diet is necessary to optimize the G:F for 15–30 kg gilts, providing a Trp:Lys ratio of 15.4:100.

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“…digestible valine requirement for this phase (50-70 kg) was 14.98 g/d(Rostagno et al, 2017).Although the animals in the treatment with the lowest protein concentration did not consume the requirement of 14.98 g/d of the digestible valine requirement proposed byRostagno et al (2017), this de ciency did not compromise their performance. Other studies have observed that the daily requirement for amino acids may be slightly overestimated in the tables proposed by Rostagno et al (2011)(Pasquetti et al, 2015;Monteiro et al, 2017), however this higher demand for amino acids may be a guarantee margin that aims to meet the requirement of the national herd(Monteiro et al, 2017).…”

mentioning

confidence: 91%

Reducing crude protein and supplementing amino acids in growing pig (50-70 kg) diets reduce nitrogen excretion but promotes different environmental impacts when using life cycle assessment

Esteves¹,

Monteiro²,

Castilha

et al. 2023

Preprint

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The objective of this study was to evaluate the performance, digestibility, and environmental impact of pigs in the growth phase receiving diets with reduced crude protein and supplementation of amino acids. In the metabolism experiment, 20 crossbred barrows with an initial average weight of 63.62 ± 2.21 kg were housed in metabolic cages, with four treatments and five replications, one animal per experimental unit. In performance experiment, 40 crossbred barrows were used, with an initial average weight of 49.92 ± 0.92 kg, with four treatments, ten replications. The treatments used in both experiments consisted of four diets containing 16, 15, 14, and 13% of CP, and supplementation with amino acids to meet the requirements of all digestible amino acids. For performance, backfat thickness, and depth of the longissimus lumborum muscle, no differences were observed. Plasma urea was lower in animals fed diets with protein reduction as well as the excretion of N urine and total N, but no differences were observed for retained N, P absorbed, P ingested, and P feces. Through the life cycle assessment, for the categories of eutrophication potential and land occupation, the protein reduction mitigated the impacts when referring to soybean meal produced in the southern region, but the protein reduction provided an increase in impact when the category evaluated was cumulative energy demand, considering the soybean produced in the south and that produced in the central west region.

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Simultaneous determination of standardized ileal digestible tryptophan and lysine for barrows from 15 to 30kg live weight

Cited by 6 publications

References 24 publications

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

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

Standardized ileal digestible tryptophan and lysine for 15–30 kg gilts

Reducing crude protein and supplementing amino acids in growing pig (50-70 kg) diets reduce nitrogen excretion but promotes different environmental impacts when using life cycle assessment

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