Dietary net energy for gilts from 25 to 100 kg body weight

Marçal, Danilo Alves; Kiefer, Charles; Nascimento, Karina Márcia Ribeiro de Souza; Bonin, Marina de Nadai; Corassa, Anderson; Alencar, Stephan Alexander da Silva; Abreu, Rodrigo Caetano de; Silva, Jéssica Lira da

doi:10.1590/rbz4720170341

Cited by 3 publications

(1 citation statement)

References 23 publications

(36 reference statements)

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“…Owing to the economic importance of the energy component in diet of pigs (Noblet, 2007), effects in performance, and carcass (Quiniou and Noblet, 2012), numerous studies have been carried out to find out the ideal level of energy that maximizes performance of pigs (Beaulieu et al, 2006;Oresanya et al, 2008;Arnaiz et al, 2009;Pereira et al, 2011;Vieira et al, 2015;Ribeiro et al, 2016;Marçal et al, 2018a;Marçal et al, 2018b;Marçal et al, 2019;Silva et al, 2020). One of the strategies that can be used to formulate feeding regimes of animals is based on the net energy (NE) amount.…”

Section: Introductionmentioning

confidence: 99%

Nutritional plans of net energy with a constant calorie:nutrient ratio on the performance of piglets from 7 to 30 kg

Rodrigues¹,

Kiefer²,

Nascimento³

et al. 2021

Revista Brasileira De Zootecnia

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Section: Introductionmentioning

confidence: 99%

Nutritional plans of net energy with a constant calorie:nutrient ratio on the performance of piglets from 7 to 30 kg

Rodrigues¹,

Kiefer²,

Nascimento³

et al. 2021

Revista Brasileira De Zootecnia

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Diet formulation method influences the response to increasing net energy in finishing pigs1

Marçal

Kiefer

Tokach

et al. 2019

Translational Animal Science

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An experiment was conducted to compare the effects of increasing dietary net energy (NE) in finishing pig diets while either maintaining a standardized ileal digestible lysine:NE ratio (SID Lys:NE) or maintaining SID Lys as a constant percentage of the diet across increasing energy densities. A total of 150 pigs (Line 600 × 241; DNA, Columbus, NE; initially 35.7 kg) were used in a 91-d study. Pigs were blocked by sex and weight and randomly assigned to 1 of 5 treatments with 2 pigs per pen and 15 pens per treatment. Treatments included a low-energy control diet that was corn-soybean meal-based with added soybean hulls, and a 2 × 2 factorial arrangement of treatments with main effects of increasing dietary NE (medium or high by adding choice white grease) and formulation method (with a SID Lys:NE ratio or maintaining the same percentage SID Lys). Linear and quadratic contrasts were made using the control diet and the medium- and high-energy diets within each formulation method. Pigs and feeders were weighed approximately every 30 d to calculate average daily gain (ADG), average daily feed intake (ADFI), and gain-to-feed ratio (G:F). At the end of the experiment, pigs were sent to a commercial processing facility for carcass data collection. From days 0 to 34 and 34 to 61, ADG and SID Lys intake increased as NE increased (linear, P < 0.05) in pigs fed diets with a Lys:NE ratio, but not for those fed the same percentage Lys. As NE increased, NE intake and G:F increased (P < 0.01) in pigs fed diets with either formulation method. From days 61 to 91, increasing NE had no effect (P > 0.10) on ADG. There was no change in G:F in pigs fed diets with the same percentage Lys (P > 0.10), but G:F decreased then increased (quadratic, P < 0.01) in response to increasing NE in pigs fed diets with a SID Lys:NE ratio. Overall, increasing dietary NE increased (linear, P < 0.001) daily NE intake and G:F (linear, P < 0.018) with either formulation method. However, SID Lys intake, ADG, and hot carcass weight only increased (linear, P < 0.01) when a SID Lys:NE ratio was maintained. Increasing NE without maintaining a constant SID Lys:NE ratio increased backfat depth (quadratic, P = 0.01), whereas it did not in pigs fed diets with a SID Lys:NE ratio. In conclusion, increasing dietary energy density increased NE intake and G:F regardless of formulation method. However, a SID Lys:NE ratio must be maintained to achieve increased ADG and minimize fat deposition.

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Nutritional plans for net energy of growing-finishing swine: economic evaluation

Silva

Kiefer

Brumatti

et al. 2021

RSD

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The energy content is the most expensive component in the diet for production of swine. In this context, the objective of this study was to evaluate the profitability of nutritional plans with different net energy (NE) levels for barrows and gilts through sensitivity analysis. Nutritional plans with variable levels of NE were evaluated (2300; 2380; 2460; 2540; 2620 and 2700 kcal of NE/kg) in diets of 144 swines. The carcasses gross profit was determined based on bonus system (CGPbs) and or based solely on live weights (CGPlw). A sensitivity analysis was performed for each NE nutritional plan with different simulations of price quotes for the ingredients in the diet. The simulations carried out for the price of corn for nutritional plans for barrows, indicate that higher levels of net energy provided the highest CGPbs and CGPlw. For degummed soybean oil, the increase in the concentration of net energy in diets provided an increase of up to 6% in CGPbs and CGPlw. For gilts, the increase of energy levels in the diets from 2460 to 2700 kcal of net energy improved the gross profit by 17% when carcasses were sold based on bonus system (CGPbs) and CGPlw was higher when fed with the diet containing 2540 kcal of NE. The increase in the net energy level from 2300 to 2700 kcal in the diet of both barrows and gilts during the growth-finishing phase generated improvements in economic gains, regardless of the way in which the animals are marketed (CGPbs and CGPlw).

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Dietary net energy for gilts from 25 to 100 kg body weight

Cited by 3 publications

References 23 publications

Nutritional plans of net energy with a constant calorie:nutrient ratio on the performance of piglets from 7 to 30 kg

Nutritional plans of net energy with a constant calorie:nutrient ratio on the performance of piglets from 7 to 30 kg

Diet formulation method influences the response to increasing net energy in finishing pigs1

Nutritional plans for net energy of growing-finishing swine: economic evaluation

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