Effect of crude glycerol on in-vitro ruminal fermentation kinetics

Peripolli, Vanessa; Prates, Ênio Rosa; Barcellos, Júlio Otávio Jardim; Wilbert, Cássio André; Camargo, Cláudia Medeiros; Lopes, Rúbia Branco; Costa, Joice Camila Martins da

doi:10.1590/s1519-99402014000100015

Cited by 5 publications

(4 citation statements)

References 22 publications

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“…Similar results for fractions B and C were obtained by Oliveira Filho et al (2015) when evaluating the inclusion of CG up to 90 g per kg DM of sorghum silage. Peripolli et al (2014), however, did not observe differences in ruminal degradation parameters of NDF when evaluating the substitution of corn by glycerol at levels up to 12 %. The non-significant effect (P>0.05) of CG levels on DM intake and a similar proportion of nutritional compounds in the diets can explain the non-significant (P>0.05) effect of CG levels on OM, NDFap, CP, NFC, EE, and TDN intake.…”

Section: Discussionmentioning

confidence: 59%

Crude glycerin combined with sugar cane silage in lamb diets

Filho

Azevêdo

Carvalho

et al. 2015

Trop Anim Health Prod

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This study aimed to evaluate the effect of the level of crude glycerin (CG) on in vitro fermentation kinetics (0, 20, 40, 60, and 80 g/kg DM of sugar cane silage), on in vitro neutral detergent fiber (NDF) degradation (0, 30, 60, and 90 g/kg DM of sugar cane silage), and intake and digestibility of nutrients and nitrogen balance (0, 20, 55, 82, and 108 g/kg DM of sugar cane silage) in lambs. The in vitro trials were conducted in a completely randomized design with three repetitions. The in vivo trial was conducted in a Latin square design with five repetitions (5 × 5). For variables in which the F test was considered significant, the statistical interpretation of the effect of CG substitution levels was carried out through regression analyses. Kinetic parameters were not affected by CG inclusion. On in vitro NDF degradation, a significant effect of CG levels was observed on the potentially degradable fraction of NDF, the insoluble potentially degradable fraction of NDF, and the undegradable NDF fraction. The intake and digestibility of nutrients and nitrogen balance were not affected by CG inclusion. The CG levels change in vitro NDF degradability parameters; however, there were no changes in animal intake, digestibility, and nitrogen balance with the inclusion levels used.

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Section: Discussionmentioning

confidence: 59%

Crude glycerin combined with sugar cane silage in lamb diets

Filho

Azevêdo

Carvalho

et al. 2015

Trop Anim Health Prod

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“…In the negative control, offering only mineral supplementation, the mean value of the experimental periods was below 5 mg of N-NH 3 /dL of ruminal liquid, below the critical value for the synthesis of microbial protein in animals on forage-based diets (LENG, 1990;DETMANN et al, 2009). In previous studies, Abo El-nor et al (2010), Peripolli et al (2014), and Botini et al (2015) evaluated the replacement of corn by increasing levels of crude glycerin and observed no effects on ruminal NH 3 concentrations. Serum blood glucose was not affected by protein-energy supplementation or the level of crude glycerin inclusion in supplements.…”

Section: Resultsmentioning

confidence: 94%

Intake, digestibility, and ruminal parameters of Nellore bulls supplemented with increasing levels of crude glycerin in Brachiaria Brizantha pastures

Possamai

Zervoudakis

Hatamoto-Zervoudakis

et al. 2017

Rev. bras. saúde prod. anim.

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SUMMARY We evaluated the effects of increasing levels of crude glycerin in multiple supplements for grazing beef cattle on intake, nutrient digestibility, pH, ruminal ammoniacal nitrogen, and serum glucose. Five Nellore steers (initial BW of 480 kg [SD 15]), grazing a tropical pasture, were used in a 5 × 5 Latin square design. The treatments used were control (no supplementation; only a mineral mixture ad libitum) and four levels of crude glycerin (0, 80, 160, 240 g/kg of supplements). Supplementation type had no impact (P > 0.05) on pH at 0 and 4 h after supplementation. Animals supplemented with different levels of crude glycerin showed higher N-NH3 values (P < 0.05) at 4 h after supplementation. Crude glycerin supplementation did not reduce pasture intake (P > 0.05), increasing dry matter intake (P > 0.05) due to increased organic matter digestibility (P > 0.05). Supplementation of 4 kg/animal with crude glycerin (240 g/kg supplement) did not reduce pasture intake and organic matter digestibility.

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“…Previous study evaluating degradation of OM and NDF reported no differences, when crude glycerin was added at up to 12% in diets for lambs in vitro (Peripolli et al, 2014). However, even at low concentration crude glycerin seems affect in situ ruminal degradation parameters of steers.…”

Section: In Situ Ruminal Degradabilitymentioning

confidence: 82%

Effects of partial or total replacement of corn cracked grain with high concentrations of crude glycerin on rumen metabolism of crossbred sheep

Cleef

Almeida

Perez

et al. 2018

Small Ruminant Research

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Crude glycerin, a by-product of the biodiesel industry, has been used as a strategic ingredient in intensive ruminant production systems, mainly in substitution of starch-rich ingredients. The present study was performed to evaluate the effects of the inclusion of up to 30% of crude glycerin in diets for feedlot sheep, on ruminal parameters, such as pH, NH 3-N and volatile fatty acids concentrations, in situ degradability, as well as in vitro greenhouse gas production and in vitro digestibility. Eight ruminally-cannulated male Santa Inês × Dorper sheep (64.5 ± 8.5 kg) were distributed in a replicated 4 × 4 Latin square design. The experimental diets contained 0, 10, 20 or 30% of crude glycerin and were labeled as G0, G10, G20 and G30, respectively. The crude glycerin totally replaced the corn cracked grain in treatment G30. The inclusion of crude glycerin in the diets tended to promote a quadratic effect in DMI, with greater values observed for treatments G10 and G20. Crude glycerin tended to increase the ruminal pH and NH 3-N, but linearly reduced the total molar concentration of VFA, acetic, butyric, isobutyric and isovaleric acids. Treatments linearly increased in vitro DM digestibility of diets and linearly reduced NDF digestibility. The inclusion of crude glycerin in the diets linearly decreased the in vitro total gas and CO 2 production (mL/g degraded) and tented to reduce CH 4 (mL/g degraded). A linear increase of soluble fraction in water ("a") of the diets was observed with the increasing inclusion of crude glycerin. The insoluble but potentially degradable fraction ("b") of DM and NDF of the diets were linearly decreased and increased, respectively. The potential ruminal degradation of the diets was markedly and linearly increased with the increasing inclusion of the by-product. The replacement of corn cracked grain by crude glycerin (up to 30% DM) changes rumen fermentation parameters, decreasing VFA production, in vitro total gas production and CH 4. Additionally, the potential and effective degradation as well as in vitro DM digestibility of diets are improved while fiber digestibility is impaired.

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Effect of crude glycerol on in-vitro ruminal fermentation kinetics

Cited by 5 publications

References 22 publications

Crude glycerin combined with sugar cane silage in lamb diets

Crude glycerin combined with sugar cane silage in lamb diets

Intake, digestibility, and ruminal parameters of Nellore bulls supplemented with increasing levels of crude glycerin in Brachiaria Brizantha pastures

Effects of partial or total replacement of corn cracked grain with high concentrations of crude glycerin on rumen metabolism of crossbred sheep

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