Balanço de nitrogênio em cordeiros alimentados com rações contendo diferentes teores de concentrado

Geron, Luiz Juliano Valério; Costa, Fabiana Gomes da; Santos, Ruth Helerene Espinosa; Garcia, Jocilaine; Trarutmann-Machado, Raquel Joana; Silva, Maria Isabel Leite da; Zeoula, Lúcia Maria; Silva, Dilma Alves

doi:10.5433/1679-0359.2015v36n3p1609

Cited by 12 publications

(13 citation statements)

References 8 publications

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“…Moreno et al (2010) observed a N intake of 32.60 g day -1 for sheep fed with 60% concentrate containing 19.0% CP. Geron et al (2015) found values of 12.38 g day -1 working with 40% concentrate containing 13.0% PB.…”

Section: Resultsmentioning

confidence: 92%

Levels of protected lysine and methionine in the diet of lambs: nutritional parameters and protein metabolites

Araújo

Macedo

Oliveira

et al. 2019

SCA

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The objective of this study was to evaluate the effect of inclusion of different levels of protected lysine and methionine on the nutritional parameters and protein metabolites of lambs. The experiment was carried out at the Capim Branco Experimental Farm, at Uberlândia Federal University, during the months of September and October 2016. Five blood lambs ½ Dorper × ½ Santa Inês, approximately eight months old and with an average weight of 50 kg, were distributed in a Latin square scheme 5 × 5 (five treatments and five replicates). The treatments consisted of the inclusion in the diet of different levels of lysine and methionine protected from ruminal degradation (MicroPEARLS LM ® ): 0 g, 8 g, 16 g, 24 g, and 32 g. The diet was composed of corn silage and concentrate in a ratio of 30V:70C. The experiment was divided into five phases. Each phase had a duration of fifteen days (ten days of adaptation of the animals to the experimental diets and five days of data collection). The animals were kept in individual metabolic cages. A digestibility assay was performed to determine the apparent dry matter intake and digestibility (DMI/DDMI), nitrogen balance, and protein metabolites. The DMI (kg day -1 ) and in relation to the metabolic weight presented a positive linear equation, and was highest for the treatment with 32 g of amino acids, as well as the ingested nitrogen and nitrogen balance, being positive in all treatments. There was no difference (P > 0.05) in the DDMI. The crude protein and urea concentrations remained above the recommended levels and the concentration of creatinine remained below the recommended level. The inclusion of protected amino acids up to 32 g increases DMI and urinary nitrogen excretion without negatively affecting digestibility. The protein metabolism was altered, without causing damage to the performance of the animals.

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Section: Resultsmentioning

confidence: 92%

Levels of protected lysine and methionine in the diet of lambs: nutritional parameters and protein metabolites

Araújo

Macedo

Oliveira

et al. 2019

SCA

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“…Fecal collecting bags were attached to each animal 5 d before fecal collection in each experimental period. Management of the animals during the adaptation and collection periods followed the protocol described by Geron et al (2015a).…”

Section: Methodsmentioning

confidence: 99%

“…Concentrations of N in the sheep urine were determined using the Kjeldahl method, as described by Silva and Queiroz (2002), and NB was estimated using the formula NB = [N provided g -N of the leftovers g) -(N in feces g + N in urine g)], as described by Geron et al (2015a). The amount of N absorbed (NA) by sheep was calculated using the equation NA = [(N provided g -N of the leftovers g) -(N in the feces g)] and N intake (NI) was estimated using the equation NI = [(N provided g -N in leftovers g)], as described by Moreno et al (2010).…”

Section: Methodsmentioning

confidence: 99%

Distiller’s dried grains with solubles (Zea mays L.) in feeding sheep on nitrogen balance

Geron

Garcia

Aguiar

et al. 2017

SCA

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The objective of this study was to evaluate the effects of diets supplemented with 0.0, 8.0, 16.0, and 24.0% distiller’s dried grain solubles (DDGS) on nitrogen (N) intake, fecal and urinary N excretion, and N absorption and retention (N balance, NB) by feeding sheep. Four sheep of unidentified race were used, with an average body weight of 23.5 ± 1.5 kg, and housed in metabolism cages. We used a 4 × 4 Latin square design for the experimental design, and each experimental period lasted for 20 days. Data on N intake (NI), fecal N, urinary N, absorbed N, and NB were expressed in g day-1; percentage of NI and grams per kilogram of metabolic weight g (kg0.75)-1 were subjected to analysis of variance (ANOVA) and regression analysis at 5% probability. Inclusion of the different concentrations of DDGS in sheep diets had no effect on NI (mean of 15.11 g animal-1 day-1), nor on fecal and urinary N excretion (mean of 5.16 and 0.16 g animal-1 day-1, respectively). Moreover, DDGS supplementation did not alter NB or N absorption (mean of 9.79 and 9.95 g animal-1 day-1, respectively). Thus, it can be concluded that inclusion of up to 24% of DDGS in feed does not affect NI, fecal and urinary N excretion, and NB in sheep.

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“…Several factors can affect the extent of CP degradation in the rumen, including the chemical and physical composition of the CP, microbial proteolytic activity, access of bacteria to protein, food retention time in the rumen, ruminal pH, food processing, ambient temperature, and modifying substances of ruminal fermentation ( VAN SOEST, 1994;GERON et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

In vitro and in vivo nutrient digestibility in sheep of rations with and without residue from the extraction of tamarind pulp

Geron

Costa

Aguiar

et al. 2015

SCA

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This study evaluated the digestibility of nutrients by, and parameters associated with, in vitro fermentation using different inocula (sheep ruminal fluid and feces) as well as the in vivo digestibility in sheep that were fed rations with 50% concentrate containing either no (0%) residue from the extraction of tamarind pulp (RETP) or 15% RETP. To determine the in vitro digestibility (IVD) of nutrients, two sheep, weighing 40.38 ± 2.10 kg, were used as inoculum donors. To determine the in vivo digestibility of nutrients, we used four sheep and a 3×2 factorial experimental design, with three methods of digestion of nutrients and two experimental rations (0% and 15% RETP). The variables were subjected to analysis of variance and the variables that showed differences at 5% probability were further analyzed using the Tukey test at 5% significance. The IVD using different inocula did not significantly differ (p>0.05) from the in vivo digestibility in sheep for dry matter (DM), organic matter (OM), and neutral detergent fiber (NDF). The different methods for determining nutrient digestibility did not affect (p>0.05) the digestibility of DM, OM, crude protein (CP), NDF, and acid detergent fiber (ADF) in rations with 0% and 15% RETP. However, the IVD of CP for rations containing 0% and 15% RETP incubated with both inocula was lower (p<0.05) than the CP digestibility in vivo. The in vivo digestibility of ADF for rations containing 0% and 15% RETP was higher (P<0.05) than the IVD using sheep ruminal fluid and feces as inocula. The pH values and concentration of ammonia nitrogen (NH 3 -N) after in vitro incubation for 24 h and the in vivo assay were not different (p>0.05) for the rations containing 0% and 15% RETP, but the pH and NH 3 -N of both fermented and rumen contents differed (p<0.05) depending on the inocula used and the in vivo assay. In summary, the digestibility of DM, OM, and NDF can be determined by the in vitro fermentation method using the ruminal fluid or feces of sheep as inocula in rations containing 0% or 15% RETP. However, in vitro fermentation is not a suitable method for the determination of pH and NH 3 -N concentration. ResumoAvaliou-se a digestibilidade de nutrientes e os paramentos da fermentação in vitro com diferentes inóculos (líquido ruminal e fezes de ovinos) e in vivo em ovinos de rações com 50% de concentrado contendo 0% (ausência) ou 15% de resíduo da extração da polpa de tamarindo (REPT). Para a determinação da digestão in vitro dos nutrientes foram utilizados dois ovinos com peso corporal médio de 40,38 kg ± 2,10 kg, como doadores de inóculo e para a determinação da digestibilidade in vivo dos nutrientes foram utilizados quatro ovinos por tratamentos distribuídos em duas rações experimentais com 0% e 15% de REPT. O delineamento experimental foi fatorial 3X2, três métodos de digestão dos nutrientes e duas rações experimentais com 0 e 15% de REPT. As variáveis estudadas foram submetidas à análise de variância e para as variáveis que apresentaram diferença a 5% de probabilidade proce...

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Balanço de nitrogênio em cordeiros alimentados com rações contendo diferentes teores de concentrado

Cited by 12 publications

References 8 publications

Levels of protected lysine and methionine in the diet of lambs: nutritional parameters and protein metabolites

Levels of protected lysine and methionine in the diet of lambs: nutritional parameters and protein metabolites

Distiller’s dried grains with solubles (Zea mays L.) in feeding sheep on nitrogen balance

In vitro and in vivo nutrient digestibility in sheep of rations with and without residue from the extraction of tamarind pulp

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