A utilização de glicerina em dietas para bovinos altera a microbiota ruminal

Fávaro, Vanessa Ruiz; D’Áurea, André Pastori; Sancanari, Juliana Borsari Dourado; Júnior, A.C. Homem; Cleef, E. H. C. B. Van; Santos, Viviane Corrêa

doi:10.1590/1678-6654

Cited by 5 publications

(7 citation statements)

References 14 publications

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“…Crude glycerin addition to diets did not affect the concentration of protozoa. This result contrasts to that reported by Fávaro et al (2014), who showed a decrease in the LAP with inclusion of up to 20% crude glycerin in cattle diets. Here we found that LAB were also not affected, suggesting that both microorganism fractions associated with the liquid phase of rumen content was not affected by crude glycerin inclusion.…”

Section: Protozoal and Bacterial Fractionscontrasting

confidence: 99%

Crude glycerin changes ruminal parameters, in vitro greenhouse gas profile, and bacterial fractions of beef cattle

et al. 2015

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As the biodiesel industry produces a large surplus of crude glycerin, this by-product is increasingly being considered as an attractive source of energy to replace corn in livestock diets. The objective of this study was to evaluate how the inclusion of up to 30% crude glycerin in Nellore cattle diets affects ruminal parameters such as pH, ammonia, and volatile fatty acids as well as greenhouse gas production, and concentration of the protozoal and bacterial fractions. Five ruminally cannulated Nellore steers were randomly assigned in a 5 Â 5 Latin square design and fed diets containing 30% corn silage and 70% concentrate composed of sunflower meal, corn grain, soybean hulls, minerals, and 0, 7.5, 15, 22.5, or 30% crude glycerin (860 g glycerol/kg). After 14 d of adaptation, animals were submitted to rumen content sampling for 7 d. With the supplementation of glycerin in the diets, total VFA and acetate concentrations decreased (linear, P¼ 0.03, Po 0.0001, respectively), and propionate concentrations increased (linear, P¼ 0.007; quadratic, P ¼0.008), leading to an acetate to propionate ratio decrease (linear, P o 0.0001). The rumen ammonia was not affected while pH was quadratically affected and was lesser for glycerin treatments (quadratic, P¼ 0.04). Methane production was reduced (linear, Po 0.0001) when glycerin was added, as well as the CO 2 (linear, P o0.0001; quadratic, P ¼0.0001; cubic, P o0.0001). The concentration of liquid phase microorganisms was not affected, while the concentration of particle-associated bacteria fraction was decreased by the addition of crude glycerin in the diets. The inclusion of up to 30% of crude glycerin in diets for beef cattle decreased ruminal concentration of total VFA and acetate, increased propionate, reduced concentration of particle-associated bacteria, and decreased production of methane.

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Section: Protozoal and Bacterial Fractionscontrasting

confidence: 99%

Crude glycerin changes ruminal parameters, in vitro greenhouse gas profile, and bacterial fractions of beef cattle

et al. 2015

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“…Moreover, considering that approximately 43% of glycerol is absorbed through the ruminal wall (Krehbiel 2008), it probably contributes to the reduction of subtract available to LAB. The lack of effect of crude glycerin on liquid-associated protozoa disagrees with the results presented by Fávaro et al (2014) who observed linear decrease of LAP, when feeding crossbred steers with 0, 50, 100, 150, or 200 g kg −1 crude glycerin. In current study, it expected a reduction in LAP yield due to the reduction of LAB, which is engulfed by protozoa as its main protein source.…”

Section: Treatments Acontrasting

confidence: 97%

High concentrations of crude glycerin on ruminal parameters, microbial yield, and in vitro greenhouse gases production in dairy cows

et al. 2016

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“…Possibly this is because part of the glycerol has a rapid absorption in the rumen wall to be metabolized in the liver to glucose and another part is fermented to propionate, which will also be converted into glucose. Fávaro et al (2014) found that 43% of the glycerol that reaches the rumen disappears by absorption by the rumen wall and 44% by fermentation, the main product of fermentation being propionate, which is a precursor of volatile fatty acids and metabolic glucose in ruminants.…”

Section: Discussionmentioning

confidence: 99%

“…It was observed that the lactose levels are within the required standards, however the fat levels are below the minimum value established by the legislation in all treatments. Studying the effect of glycerin on the ruminal microbiota of cattle Fávaro et al (2014) reported that the economic viability of using glycerin in animal feed depends on the price relationship between ingredients, especially corn and soybean oil or other energy source. Lage et al (2014) recommended that glycerin emerges as an option in the formulation of diets, being able to replace corn, when the price represents up to 70% of the price of corn.…”

Section: Discussionmentioning

confidence: 99%

“…The difficulty in using surplus glycerin production is exacerbated due to the peculiarity of its characteristics (Fávaro et al, 2014). Aiming at maximum efficiency in this activity, research and adaptation of new technologies has been intensified, including in nutrition, with the use of alternative food sources, which can replace premium foods without changing the composition and quality of goat milk and its derivatives (El-Shafei et al, 2020;Hadjimbei et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Production and economic analysis of milk from goats fed with double-distilled glycerin

et al. 2022

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The objective of this research was to evaluate the production, milk quality, consumption and financial analysis of milk from goats consuming diets with different levels of double-distilled glycerin. Twelve multiparous Saanen goats, weighing 40 ± 6 kg and 30 ± 5 days of lactation, kept in a confinement system for 60 days were used. The goats were randomly distributed in a Latin square (4 x 4), according to the levels of double-distilled glycerin. The ingredients used were tifton hay, ground corn grain, soybean meal, vitamin/mineral supplement, urea, and double-distilled glycerin levels (0, 6, 12 and 18%) to replace corn in the diets. The milk fat of goats fed with double-distilled glycerin in the diet showed a decreasing linear regressive effect (P = 0.001). Dry matter intake showed a quadratic regressive effect (P = 0.033). Evaluating the total cost of each diet, it was observed that the level containing 0% glycerin was the diet with the lowest cost per kilogram. The use of double-distilled glycerin in the feeding of dairy goats can be recommended up to the level of 18% of corn replacement without harming milk production, however, it is necessary to verify the economic viability, considering that there will be losses in the quality of the milk produced.

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A utilização de glicerina em dietas para bovinos altera a microbiota ruminal

Abstract: A utilização de glicerina em dietas para bovinos altera a microbiota ruminal [The use of glycerin

Cited by 5 publications

References 14 publications

Crude glycerin changes ruminal parameters, in vitro greenhouse gas profile, and bacterial fractions of beef cattle

Crude glycerin changes ruminal parameters, in vitro greenhouse gas profile, and bacterial fractions of beef cattle

High concentrations of crude glycerin on ruminal parameters, microbial yield, and in vitro greenhouse gases production in dairy cows

Production and economic analysis of milk from goats fed with double-distilled glycerin

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