Effects of replacing barley grain in feedlot diets with increasing levels of glycerol on in vitro fermentation and methane production

Ávila, Jorge; Chaves, Alex V.; Hernandez-Calva, M; Beauchemin, K. A.; McGinn, S. M.; Wang, Y; Harstad, Odd Magne; McAllister, Tim A.

doi:10.1016/j.anifeedsci.2011.04.016

Cited by 56 publications

(61 citation statements)

References 16 publications

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“…The mean NH 3 -N results obtained in the present study of 15.69mg/dl were within the optimal ruminal NH 3 -N range (12 to 17mg/dl, MAPATO et al, 2010;LUNSIN et al, 2012) for rumen ecology, fermentation and optimal microbial growth (ANANTASOOK & WANAPAT, 2012). These results are consistent with the previous work that shows that feeding glycerol substituting corn or barley grain in the diet does not have any effect on NH 3 -N concentration (ABO EL-NOR et al;AVILA et al, 2011). The energy value of glycerol is approximately equal to the energy contained in corn starch.…”

Section: Resultssupporting

confidence: 93%

Effect of crude glycerol on in-vitro ruminal fermentation kinetics

Peripolli

Prates

Barcellos

et al. 2014

Rev. bras. saúde prod. anim.

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SUMMARYThe interest in using crude glycerol in animal feeding has reemerged due to its increasing availability and favorable price resulting from the expansion of biofuel industry. The objective of the present study was to evaluate the effects of substituting corn for crude glycerol at different levels in the diet on ruminal fermentation using in-vitro true digestibility parameters. The experimental treatments consisted of substituting corn for liquid crude glycerol (0; 4; 8 and 12%) in dry matter basis. Diets consisted of 60% alfalfa hay and 40% corn and glycerol substituted the corn in the diet. In addition to the 48 hours traditionally applied in digestibility assays, different in-vitro digestibility times were used (0; 4; 8; 16; 48, 72 and 96 hours) in order to study digestion kinetics. The dietary corn substitution for increasing crude glycerol levels did not affect ammonia nitrogen content, metabolizable energy content, in-vitro digestibility of organic matter and neutral detergent fiber, nor ruminal degradation parameters. However this byproduct of biodiesel production may be tested in-vivo as an alternative energy feedstuff in ruminant diets.Keywords: co-product of biodiesel, degradation parameters, effective degradability, in-vitro neutral detergent fiber digestibility, ruminant RESUMO O interesse na utilização da glicerina bruta na alimentação animal ressurge, devido ao aumento na disponibilidade e preço favorável, como conseqüência da expansão das indústrias de biocombustíveis. O objetivo deste trabalho foi avaliar os efeitos da substituição do milho por diferentes níveis de glicerina bruta na dieta sobre a fermentação ruminal através da digestibilidade in vitro verdadeira. As dietas experimentais consistiram na substituição do milho por glicerol (0; 4; 8 e 12%) na matéria seca da dieta (MS). As dietas eram compostas por 60% de feno de alfafa e 40% de grão de milho e o glicerol foi adicionado, substituindo o milho nas dietas. Além de trabalhar com as 48 horas tradicionais, foram utilizados diferentes horários de digestibilidade in vitro (0; 4; 8; 16; 48; 72 e 96 horas), com a finalidade de estudar a cinética da digestão. A substituição do milho por níveis crescente de glicerina bruta na dieta não afetou a concentração de N-NH 3 , o teor de energia metabolizável, as digestibilidades in vitro da matéria orgânica da fibra em detergente neutro, bem como os parâmetros da degradação ruminal. Portanto, esse subproduto da produção do biodiesel deve ser testado in vivo como uma alternativa energética na formulação de dietas para ruminantes.

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Section: Resultssupporting

confidence: 93%

Effect of crude glycerol on in-vitro ruminal fermentation kinetics

Peripolli

Prates

Barcellos

et al. 2014

Rev. bras. saúde prod. anim.

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“…This by-product is produced in a ratio of about 1 unit for 9 units of biodiesel produced, containing about 80% glicerol (propane-1,2,3-triol or 1,2,3-propanetriol) and is used mainly as energy source in animal nutrition. Also, it is easily fermented by ruminal microbes, producing large proportion of propionate (AVILA et al, 2011;BERGNER et al, 1995), or absorbed directly into the portal blood via rumen or small intestine and converted to glucose and lipids in the ruminant metabolism (KRISTENSEN; RAUN, 2007).…”

Section: Introductionmentioning

confidence: 99%

Fatty acid profile and lambs’ meat quality fed with different levels of crude glycerin replacing corn

Rêgo

Françozo

Ludovico

et al. 2017

SCA

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This study aimed to evaluate the Texel lambs' meat quality fed with increasing levels of crude glycerin (0, 7, 14, and 21% of dry matter) in the diet. Thirthy-two-two non-castrated male Texel lambs were used, with initial weight of 15.9 ± 4.1 kg, using a completely randomized design with four treatments and eight repetitions, per treatment. Upon reaching the average weight of 35 kg, the animals were slaughtered. The meat chemical composition was similar among treatments (P>0.05) and total lipids and crude protein presented averages of 3.47 and 20.05 g 100g -1, respectively. No changes in pH, marbling, color, and water loss under pressure were observed. The shear force did not change among treatments and the texture can be considered soft, with average values of 5.48 kgf. There was a linear (P<0.05) decrease in odor values by the addition of glycerin and no significant differences (P>0.05) were observed for the attributes flavor, tenderness, juiciness, and overall acceptance among treatments. Fatty acids in higher proportions in the meat lamb were to C18:1n-9 (1298.90 mg 100g -1 ), C16:0 (709.07 mg 100g -1 ) and C18:0 (433.30 mg 100g -1 ), with percentages of 42.72, 23.07 and 14.35%, respectively. Significant difference according to the glycerin level in the diet was observed only for the margaric acid (C17:0) with an increasing linear effect, reaching 58.95 mg 100g -1 muscle to the group with 21% crude glycerin, corresponding to 1.77% of total fatty acids. The other fatty acids did not change, and provided a satisfactory result for conjugated linoleic acid (CLA), totaling about 6.1 mg 100 g -1 muscle, corresponding to 0.21% of total lipids. The use of glycerin in the diet for finishing lambs does not alter the characteristics of the meat, maintaining the product quality for consumption. ResumoObjetivou-se avaliar a qualidade da carne de cordeiros Texel alimentados com níveis crescentes de glicerina bruta (0, 7, 14 e 21% da matéria seca) na dieta. Trinta e dois cordeiros Texel machos não castrados foram avaliados, com peso inicial de 15,9 ± 4,1 kg, em delineamento inteiramente casualizado, com quatro tratamentos e oito repetições. Ao atingir o peso médio de 35 kg, os animais foram abatidos. A composição química da carne foi similar entre os tratamentos e as medias de lipídios totais e proteína bruta foram 3,47 e 20,05 g 100 g -1 , respectivamente. Não houve variações nos valores de pH, marmoreio, cor e perda de água por pressão. A força de cisalhamento não variou entre os tratamentos e a textura da carne pode ser considerada macia, com valores médios de 5,48 kg-f. Houve decréscimo linear nos valores de odor em função da adição de glicerina bruta e não houve diferença significativa para sabor, maciez, suculência, e aceitação geral entre os tratamentos. Os ácidos graxos encontrados em maiores proporções na carne de cordeiros foram C18:1n-9 (1298,90 mg 100g ), com porcentagens de 42,72, 23,07 e 14,35%, respectivamente. Foi observada diferença significativa em função do nível de glicerina na dieta apenas pa...

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“…According to some authors (Abo El-Nor et al, 2010;Ávila et al, 2011), glycerin has a ruminal fermentation characteristic of formation of propionic acid and reduction in acetate: propionate ratio, which would lead to reduction in the production of methane removal of H 2 from the middle, but it is possible that on a diet with high concentrate this effect is not as pronounced as on a diet with a high proportion of roughage feed (Lee et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

Quantification of ruminal microbiota and production of methane and carbonic dioxide from diets with inclusion of glycerin

Santos

Homem

Pinheiro

2015

Arq. Bras. Med. Vet. Zootec.

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The aim of this study was to quantify the liquid-associated bacteria and protozoa of the rumen and to evaluate the potential of in vitro production of gases CH 4 and CO 2 of diets with inclusion of glycerin for sheep. Two diets were formulated with a roughage:concentrate ratio of 20:80, according to the presence or absence of glycerin: G0 -control, without glycerin; and G10 -10% glycerin as part of the concentrate.To quantify the liquid-associated bacteria and protozoa from the rumen and production of CH 4 and CO 2 gases, a completely randomized design was used. The diets had no effect (P>0.05) on production and composition of liquid-associated protozoa and bacteria from the rumen of lambs. Likewise, a (P>0.05) diet effect was not observed on production of CH 4 and CO 2 in vitro, which presented average concentrations of 24.55mL/g MS and 51.52mL/g MS, respectively. The use of 10% glycerin did not alter production or composition of ruminal microflora, and moreover, did not negatively impact the production of CH 4 and CO 2 gases in vitro.

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Effects of replacing barley grain in feedlot diets with increasing levels of glycerol on in vitro fermentation and methane production

Cited by 56 publications

References 16 publications

Effect of crude glycerol on in-vitro ruminal fermentation kinetics

Effect of crude glycerol on in-vitro ruminal fermentation kinetics

Fatty acid profile and lambs’ meat quality fed with different levels of crude glycerin replacing corn

Quantification of ruminal microbiota and production of methane and carbonic dioxide from diets with inclusion of glycerin

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