Teor de proteína no metabolismo do nitrogênio e da energia em suínos durante o crescimento

Oliveira, Vladimir de; Fialho, Elias Tadeu; Lima, J.A.F; Bertechini, Antônio Gilberto; Freitas, Rilke Tadeu Fonseca de

doi:10.1590/s1413-70542005000400020

Cited by 7 publications

(3 citation statements)

References 20 publications

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“…There was a reduction of approximately 9.5% in the urinary nitrogen for every percentage point reduced in the protein content of the diets; , Canh et al (1998), andOliveira et al (2005) found values close to 11%.…”

Section: Resultsmentioning

confidence: 83%

Reduction of the crude protein content of diets supplemented with essential amino acids for piglets weighing 15 to 30 kilograms

et al. 2014

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-Two experiments were carried out to evaluate the reduction of crude protein (CP) in diets supplemented with synthetic amino acids for piglets of 15 to 30 kg. In the performance assay (Exp I), 60 piglets with initial weight of 15.34±0.87 kg and final weight of 30.08±1.59 kg were distributed in a randomized block design with six replicates, five treatments and two animals per experimental unit. The treatments consisted of five diets in which the CP was reduced by 1.5 percentage points, resulting in low-protein diets (19.24, 17.74, 16.24, 14.74 and 13.24%), meeting the requirements of amino acids with inclusion of L-lysine, DL-methionine, L-threonine, L-tryptophan, L-valine and L-isoleucine. The average daily gain and feed conversion according to the Linear Response Plateau model (LRP) were estimated at 14.23 and 14.79% of CP, respectively. As the CP levels were reduced, there was an increase in the essential:non-essential amino acids ratio. The plasma urea concentration decreased linearly, indicating that there was a better use for amino acids with the CP reduction. In the nitrogen balance (Exp II), 30 crossbred barrow piglets with average weight of 21.69±4.46 kg were housed in metabolic cages, distributed in a completely randomized design with five treatments and six replicates, and the experimental unit consisted of a piglet. The biological protein value in the diets remained above the ideal (70%), in which the level of 13.24% CP corresponded to the highest value. There was no difference in levels of urea in blood and urine. Reduction of protein levels is efficient in decreasing the pollution effect in the excreta, with lower nitrogen excretion in feces and urine.

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Section: Resultsmentioning

confidence: 83%

Reduction of the crude protein content of diets supplemented with essential amino acids for piglets weighing 15 to 30 kilograms

et al. 2014

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“…According to Oliveira et al (2005), several factors affect digestibility, including the absence of endogenous enzymes required for he fiber digestion in the pig digestive system. Santos et al (2005) reported that the gastrointestinal tract of the pig is not capable to store large amounts of food, causing an increased rate of digesta passage through the gastrointestinal tract and less contact time between digesta and digestive enzymes and absorptive cells of the small intestine.…”

Section: Resultsmentioning

confidence: 99%

Finishing swine fed cashew bagasse bran

et al. 2016

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-The purpose of this study was to evaluate the digestibility of cashew bagasse bran as well as the performance of swine fed diets with different levels of inclusion of this by-product and their economic viability. In the digestibility trial, ten crossbred barrows weighing 60±6.86 kg were housed in metabolic cages. Five received standard feed and five received test feed with 300 g kg −1 cashew bagasse bran included. For the performance and economic viability study, forty crossbred pigs weighing 60±5.24 kg were allotted in a randomized block design with five treatments (0, 75, 150, 225, and 300 g kg −1 inclusion of cashew bagasse bran) and four replications. Daily feed intake, daily gain, feed conversion, partial gross income with and without allowance index, and partial net income with and without allowance index were evaluated. Data were subjected to analysis of variance and regression analysis. The treatment with 75 g kg −1 cashew bagasse bran provided the best results. Cashew bagasse bran can be included in the diet of finishing pigs up to the level of 300 g kg −1 without adversely affecting animal performance.

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“…Some works have shown that nutrient manipulations in diets can influence the performance (AROUCA et al, 2007;ZANGERONIMO et al, 2009), nitrogen metabolism (OLIVEIRA et al, 2005;ZANGERONIMO et al, 2007a), physiologic parameters (ZANGERONIMO et al, 2007b) and carcass composition of swine .…”

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confidence: 99%

Performance and carcass characteristics of swine at 50 kg fed diets with different energy levels and reduced levels of crude protein

et al. 2009

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The aim of this work was to evaluate the effects of different levels of metabolic energy (ME) in diets with a reduced level of crude protein (CP) on the performance and carcass characteristics of growing swine. Thirty-two high-performance barrows (initial weight of 22.5 ± 1.43 kg and final weight of 50.81 ± 2.54 kg) were distributed in a randomized block design with four treatments (three levels of ME - 3,060, 3,230 and 3,400 kcal/kg - in diets with 14% CP, and one control treatment with 3,230 kcal ME/kg and 18% CP) and four replicates. The diets were formulated with a true digestible basis of amino acids present in the feed, with methionine and threonine concentrations corrected as a function of lysine levels. The animals were slaughtered and their carcasses were studied. The ME levels did not affect the average weight gain, the feed:gain ratio, the backfat thickness or the loin eye area. A higher carcass yield and a higher carcass meat:fat ratio were observed in the animals that received the 3,230 and 3,060 kcal/kg ME levels. Compared to the control treatment, only the 3,400 kcal/kg ME level had a lower average daily feed intake. It is concluded that the CP level in diet should be reduced from 18% to 14% and the metabolizable energy level should be increased, thus reducing the feed intake and increasing the carcass meat:fat ratio without affecting the animal weight gain.

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Teor de proteína no metabolismo do nitrogênio e da energia em suínos durante o crescimento

Cited by 7 publications

References 20 publications

Reduction of the crude protein content of diets supplemented with essential amino acids for piglets weighing 15 to 30 kilograms

Reduction of the crude protein content of diets supplemented with essential amino acids for piglets weighing 15 to 30 kilograms

Finishing swine fed cashew bagasse bran

Performance and carcass characteristics of swine at 50 kg fed diets with different energy levels and reduced levels of crude protein

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