Influence of Level and Source of Dietary Fat on Its Comparative Feeding Value in Finishing Diets for Feedlot Steers: Metabolism

Zinn, R. A.

doi:10.2527/jas1989.6741038x

Cited by 131 publications

(92 citation statements)

References 28 publications

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“…Across of fat-supplemental diets, the decline in postruminal digestion was 6.9-fold greater for C18:0 than for C16:0; consistent with the concept that intestinal digestion of saturated fatty acids decreases with increasing chain length (Zinn 1989). Furthermore, whereas C18:0 comprised only 10.8% of FA intake, it comprised 63.3% of total FA flow to the small intestine.…”

Section: Resultssupporting

confidence: 61%

Influence of method of surfactant supplementation on characteristics of digestion and feeding value of fat in Holstein steers fed a high-energy finishing diet

Dávila-Ramos¹,

González-Castellón²,

Barreras³

et al. 2011

Journal of Applied Animal Research

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Four Holstein steers (271 9 11 kg) with cannulae in the rumen and proximal duodenum were used to study the influence of method of surfactant (Tween 80) supplementation on characteristics of digestion and feeding value of fat. Treatments consisted of a steam-flaked corn-based finishing diet supplemented with: (1) no supplemental fat, no surfactant; (2) 6% supplemental fat (yellow grease, no surfactant; (3) 5.75% supplemental fat plus 0.25% Tween 80 (TW) added to the diet as part of the premix (TW was mixed with premix before incorporation with grain in the mixer, as second step in diet preparation) and (4) 5.75% supplemental fat plus 0.25% TW combined directly with the supplemental fat (TW was mixed with supplemental fat before incorporation into the feed mix as penultimate step in diet preparation). There was no surfactant by supplemental fat interactions (p ! 0.05). Surfactant did not affect (p ! 0.05) site and extent of organic matter (OM), starch, N, acid detergent fiber (ADF) and fatty acid (FA) digestion, or digestible energy (DE) value of diet. Supplemental fat decreased (p B 0.05) ruminal and total tract digestion of OM and ADF and increased (p B0.05) the DE value of diet. The decrease in postruminal FA digestion was mainly due to decreased (p B0.05) digestion of C18:0. Digestible energy of supplemental fat averaged 6.87 Mcal/kg. It is concluded, that independent of method of addition, supplementing high-fat diets with 0.22% of Tween 80 does not influence site and extent of digestion or the feeding value of supplemental fat.

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Section: Resultssupporting

confidence: 61%

Influence of method of surfactant supplementation on characteristics of digestion and feeding value of fat in Holstein steers fed a high-energy finishing diet

Dávila-Ramos¹,

González-Castellón²,

Barreras³

et al. 2011

Journal of Applied Animal Research

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“…Estes resultados são contrários aos relatados por Warren et al (1988), que forneceram 0; 25 e 50% de CAI, respectivamente, com 8, 1, e 12,6% de EE, e Karalazos et al (1992), que notaram depressão linear significativa no coeficiente de digestibilidade da MS e MO com o aumento do caroço de algodão de 0 a 53% na dieta. Também Zinn (1989) verificou diminuição linear da digestão ruminal da MO com aumento do nível de óleo como suplemento de 0 a 8%, o que pode ser creditado ao impacto da gordura na dieta, que pode deprimir a digestibilidade da fibra. No entanto, essa influência depende da fonte, do processamento e nível de inclusão do suplemento.…”

Section: Resultsunclassified

Desempenho e digestibilidade aparente em ovinos confinados alimentados com dietas contendo níveis crescentes de caroço de algodão integral

et al. 2008

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RESUMO -Este trabalho foi realizado com o objetivo de avaliar os efeitos de dietas com diferentes níveis (0,0; 20,0; 30,0 e 40,0%) de caroço de algodão integral (Gossypium hirsutum L.) na matéria seca da dieta sobre o desempenho, consumo e a digestibilidade dos nutrientes de ovinos Santa Inês. Vinte e quatro cordeiros inteiros com peso corporal médio inicial de 19,5 kg foram submetidos a um delineamento inteiramente casualizado, com quatro dietas e seis repetições. Os consumos de matéria seca, expressos em kg/dia, %PV e g/kg 0,75 , não foram influenciados pela inclusão do caroço de algodão integral (CAI), com médias de 1,195; 4,61 e 104,07, respectivamente. Os ganhos de peso total e diário decresceram, enquanto a conversão teve efeito linear crescente, mas entre os níveis de CAI o de 20% apresentou desempenho semelhante à dieta controle. Os consumos de matéria orgânica (MO), proteína bruta (PB), carboidratos totais (CHT) e nutrientes digestíveis totais, expressos em g/dia, não foram afetados, enquanto os de fibra em detergente neutro (FDN), fibra detergente ácido (FDA) e extrato etéreo (EE) tiveram efeito linear crescente com a adição do CAI. A inclusão do caroço de algodão na alimentação proporcionou efeito quadrático para os coeficientes de digestibilidade de PB e FDA e linear crescente para FDN e EE, porém não afetou os de MS, respectively. The total and daily weight gains decreased, while the feed conversion ration showed increasing linear effect with the inclusion of WCS, except for the level of 20% WCS that showed similar performance to the control diet. The intakes of dry matter (DM), organic matter (OM), crude protein (CP), total carbohydrates (TC) and total digestible nutrients (TDN), in g/day were not affected, while the neutral detergent fiber (NDF), acid detergent fiber (ADF), ether extract (EE) presented increasing linear effect with the inclusion of WCS. The inclusion of whole cottonseed in the feeding provided quadratic effect for digestible coefficients of CP, ADF and increasing linear effect for NDF and EE, however did not affect DM, OM, TC and TDN intake of the diets. The whole cottonseed in the used levels does not alter the intake and the digestibility of the DM, NDF and TND, but reduced the weight gain and feed conversion ratio of feedlot of the Santa Inez lambs, and could be included in termination diets.Key Words: gossypol, intake, oleaginous legumes, Santa Inez, weight gain IntroduçãoUma estratégia utilizada para a melhoria do desempenho dos rebanhos nordestinos de pequenos ruminantes, caracterizados por baixos índices produtivos, seria o manejo alimentar adequado, principalmente nas épocas secas de escassez de forragens, usando-se sistemas intensivos de produção, como o confinamento ou semi-confinamento.

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“…Zinn et al (2002) summarized available literature and suggested that post-ruminal starch digestion appears to be limited by accessibility of the amylolytic enzymes and not limitations in the amount of enzymes. It is Karr et al (1966), Hibberd et al (1985), Axe et al (1987), Zinn (1988Zinn ( , 1989Zinn ( , 1990Zinn ( , 1991, Streeter et al (1989Streeter et al ( , 1990Streeter et al ( , 1991, Hill et al (1991), Palmquist et al (1993), Streeter and Mathis (1995), Swingle et al (1999), Theurer et al (1999), Garcia et al (2000).…”

Section: Optimizing Site Of Digestion Advantagesmentioning

confidence: 99%

Factors affecting intestinal starch digestion in ruminants: A review

Harmon

Yamka²,

Elam³

2004

Can. J. Anim. Sci.

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Harmon, D. L., Yamka, R. M. and Elam, N. A. 2004. Factors affecting intestinal starch digestion in ruminants: A review. Can. J. Anim. Sci. 84: 309-318. The process of starch assimilation in the ruminant is complex and remains an avenue by which increases in production efficiency can be gained. Ruminal starch digestion is typically 0.75-0.80 of starch intake. Starch that escapes fermentation and flows to the small intestine may be more resistant to enzymatic digestion and on average 0.35-0.60 of starch entering the small intestine is degraded there. Of the fraction that escapes small intestinal digestion an additional 0.35-0.50 is degraded in the large intestine. This suggests that limitations to small intestinal starch digestion do exist. This review summarizes available information describing the digestive and absorptive processes occurring in the small intestine with an emphasis on nutritional factors that influence these processes. A review of experiments measuring small intestinal starch digestion indicates that small intestinal digestion is either highly variable or poorly determined whereas ruminal and large intestinal digestion are much more clearly described. These data indicate that improvements in methodologies are needed before we can accurately describe processes occurring in the small intestine and formulate diets to optimize site of starch digestion. L'amidon qui échappe à la fermentation pour passer dans l'intestin grêle pourrait résister davantage à une digestion enzymatique et 35 à 60 % de cet amidon y est dégradé. Sur la fraction qui sort intacte de l'intestin grêle, 35 à 50 % sont dégradés dans le gros intestin. Tout laisse croire que la digestion de l'amidon dans l'intestin grêle a ses limites. L'article que voici résume l'information disponible sur les mécanismes de digestion et d'absorption qui surviennent dans l'intestin grêle, en mettant l'emphase sur les paramètres nutritionnels qui influent sur ces mécanismes. L'analyse des expériences jaugeant la digestion de l'amidon dans l'intestin grêle indique que cette dernière varie considérablement ou est mal évaluée, tandis qu'on possède des données nettement plus précises sur la digestion dans le rumen ou le gros intestin. Les données laissent croire que les méthodes devraient être améliorées avant qu'on puisse décrire avec précision les processus qui surviennent dans le petit intestin et qu'on formule des régimes en vue d'optimiser la digestion de l'amidon. Mots clés: Ruminants, amidon, glucose, intestin grêle, digestionThe ruminant digestive system provides the powerful advantage of pregastric fermentation that enables the use of structural carbohydrates and the production of microbial protein to meet the needs of the host. This complexity of ruminant digestion also offers a challenge towards optimizing nutrient supply for the host. Despite the advantages for use of structural carbohydrates, the system is not designed for use of nonstructural carbohydrates. The pregastric fermentation results in fermentation losses of 13-18% of gross energy ...

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Influence of Level and Source of Dietary Fat on Its Comparative Feeding Value in Finishing Diets for Feedlot Steers: Metabolism

Cited by 131 publications

References 28 publications

Influence of method of surfactant supplementation on characteristics of digestion and feeding value of fat in Holstein steers fed a high-energy finishing diet

Influence of method of surfactant supplementation on characteristics of digestion and feeding value of fat in Holstein steers fed a high-energy finishing diet

Desempenho e digestibilidade aparente em ovinos confinados alimentados com dietas contendo níveis crescentes de caroço de algodão integral

Factors affecting intestinal starch digestion in ruminants: A review

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