&lt;b&gt;Performance of beef cattle bulls in feed lots and fed on diets containing enzymatic complex

Oliveira, Leonardo Guimarães de; Ferreira, Reginaldo Nassar; Pádua, João Teodoro; Ulhôa, Cirano José; Cysneiros, Cristine dos Santos Settimi

doi:10.4025/actascianimsci.v37i2.26446

Cited by 10 publications

(11 citation statements)

References 33 publications

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“…Nevertheless, results obtained in the literature are inconsistent regarding the enzymes use on performance of the animals in these dietary conditions (Beauchemin, Rode, & Sewalt, 1995;DiLorenzo et al, 2011;Hristov, McAllister, & Cheng, 2000;Oliveira et al, 2015). This inconsistency of results can be attributed in part to differences in activity and characteristics of the enzymes used in each study, as well as physical and chemical properties of the diet, since enzymes performance are related with substrate specificity (Meale, Beauchemin, Hristov, Chaves, & McAllister, 2014).…”

Section: Introductionmentioning

confidence: 67%

“…These results suggest a better adaptation to energy-dense diets for ENZ group. However, during the other phases, ENZ did not show a favorable effect (p > 0.05) on ADG, DMI in kg day Oliveira et al, 2015), with the exception of adaptation period. Meale et al (2014) consider that to obtain results in performance using enzymes, the type and amount of substrate, amount of enzymes, and enzymesubstrate relationship must be adequate.…”

Section: Resultsmentioning

confidence: 94%

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<b>Xylanase - complex efficacy in high-energy diet for bulls finished in feedlot

Neumann

Leão

Vigne

et al. 2017

Acta Sci. Anim. Sci.

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ABSTRACT. Enzymes can be an interesting additive in high energy diets for feedlot cattle. However, literature is inconsistent on this subject. Thus, this study was conducted to evaluate animal performance of feedlot bulls receiving high energy diet, composed of a mixture of 85% whole corn grain and 15% proteinmineral-vitamin nucleus, without or with xylanase included in the diets. Diets consisted of: CON -diet without enzymes (Control) and ENZ -diet with enzymes (5 g animal day -1). Thirty-two bulls were used, with an average age of 11 ± 2 months, average initial weight of 365 ± 5 kg, and finished for 119 days in feedlot. The experimental design was completely randomized, consisting of two treatments and eight replications, where each replication was represented by a stall with two animals. ENZ increased the weight gain (1.69 vs. 1.33 kg day -1) and improved the feed conversion (4.60 vs. 6.03 kg -1 ) in the adaptation period of the animals. Animals receiving ENZ increased 1.65% of carcass yield and were 7.57% more efficient in the conversion of dry matter consumed into carcass gain in relation to CON. Carcass traits of feedlot-finished bulls were not altered by inclusion of enzymes. Xylanase-complex could increase efficiency in feedlot bulls.Keywords: beef cattle, feed additive, ruminant nutrition.Eficiência do complexo xilanase em dietas de alta energia para touros terminados em confinamento RESUMO. As enzimas podem ser aditivos interessantes em dietas de alta energia para gado em confinamento. No entanto, a literatura é inconsistente para este assunto. Assim, este trabalho foi realizado para avaliar o desempenho de touros em confinamento com dietas de alta densidade energética, composto apenas de uma mistura de 85% de grãos de milho inteiros e 15% de núcleo proteico-vitamínico-mineral, com ou sem inclusão de enzimas à base de xilanase. Os tratamentos foram CON -dieta sem enzimas (controle) e ENZ -dieta com enzimas (5 g animal dia -1 ). Foram utilizados 32 touros, com idade média de 11 ± 2, peso inicial médio de 365 kg ± 5 e terminados por 119 dias. O delineamento experimental foi inteiramente casualizado, consistindo em dois tratamentos e oito repetições, em que cada repetição foi representada por uma baia com dois animais. ENZ aumentou o ganho de peso (1,69 vs. 1,33 kg dia -1 ) e melhorou a conversão alimentar (4,60 vs. 6,03 kg -1 ) na fase de adaptação dos animais em confinamento. Os animais que receberam ENZ aumentaram 1,65% do rendimento de carcaça e foram 7,57% mais eficientes na transformação da matéria seca consumida no ganho de carcaça em relação ao CON. As características de carcaça de touros terminados em confinamento não foram alteradas em função da inclusão de enzimas. O complexo de xilanase pode aumentar eficiência de touros de confinamento.Palavras-chave: bovinos de corte, aditivo alimentar, nutrição de ruminantes.

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Section: Introductionmentioning

confidence: 67%

Section: Resultsmentioning

confidence: 94%

<b>Xylanase - complex efficacy in high-energy diet for bulls finished in feedlot

Neumann

Leão

Vigne

et al. 2017

Acta Sci. Anim. Sci.

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“…Low fecal pH was related to the large quantity of starch in feces of feedlot cattle fed high‐grain diets (Oliveira et al, ). Consequently, more starch flows to the large intestine, resulting in secondary fermentation and increased production of short‐chain fatty acids that decreases pH (Depenbusch et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…Low fecal pH was related to the large quantity of starch in feces of feedlot cattle fed high-grain diets (Oliveira et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Effects of maternal protein supplementation and inclusion of rumen‐protected fat in the finishing diet on nutrient digestibility and expression of intestinal genes in Nellore steers

Cruz

Schoonmaker

Resende

et al. 2019

Animal Science Journal

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The study aimed to evaluate nutrient digestibility and intestine gene expression in the progeny from cows supplemented during gestation and fed diets with or without rumen‐protected fat (RPF) in the feedlot. Forty‐eight Nellore steers, averaging 340 kg, were housed in individual pens and allotted in a completely randomized design using a 2 × 2 factorial arrangement (dams nutrition × RPF). Cows' supplementation started after 124 ± 21 days of gestation. The feedlot lasted 135 days and diets had the inclusion of zero or 6% of RPF. Digestibility was evaluated by total feces collection. Steers were slaughtered using the concussion technique and samples of pancreas and small intestine were collected immediately after the slaughter to analyze α‐amylase activity, and the expression of SLC5A1, CD36, and CCK and villi morphometry. Feeding RPF increased nutrients digestibility (p < 0.01). There was no effect of maternal nutrition on digestibility and α‐amylase activity in steers (p > 0.05). Duodenal expression of SLC5A1, CD36, and CCK increased in the progeny from restricted cows. In conclusion, protein restriction during mid to late gestation of dams has long‐term effects on small‐intestine length and on expression of membrane transporters genes in the duodenum of the progeny. However, maternal nutrition does not affect digestibility in the feedlot.

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“…An amylolytic enzyme complex produced by fungus Aspergillus awamori and a commercial product containing multienzyme complex, yeast and MOS evaluated in confined beef cattle were not able to improve animal performance. 41 Although, application of enzymes has proven to increase the feed value of poor quality feedstuffs, its use by smallholder farmers is, for the time being, economically unattractive. Especially, the use of lignin-degrading enzymes, originating from white rot fungi and which selectively target lignin seems a promising development.…”

Section: Enzyme Feed Additives For Ruminantsmentioning

confidence: 99%

Scope of Exogenous Enzymes in Enhancing Ruminant Productivity

Sridhar

Senani

et al. 2017

JDVAR

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Exogenous enzymes added to animal feeds hold immense scope for enhancing livestock productivity. They improve not only the utilization of the lignocellulosic biomass, but also have had a positive impact on the quality of the environment through reduced output of excreta and pollutants such as phosphate and nitrogen including ammonia. Most of the exogenous enzyme research in sheep and cattle has been restricted to cellulases and xylanases and have demonstrated varied responses, although lignolytic enzymes have proven to be highly beneficial, their use is still in its infancy. Also many problems related to product formulation, under-or over-supplementation, appropriate method and form of providing the enzyme, and the level of productivity of the animal need to be addressed before their full potential are exploited. With increasing consumer concern about the use of growth promoters and antibiotics in ruminant production, and the magnitude of increased animal performance obtainable using exogenous enzymes, these products could play a vital role in enhancing ruminant production.

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<b>Performance of beef cattle bulls in feed lots and fed on diets containing enzymatic complex

Cited by 10 publications

References 33 publications

<b>Xylanase - complex efficacy in high-energy diet for bulls finished in feedlot

<b>Xylanase - complex efficacy in high-energy diet for bulls finished in feedlot

Effects of maternal protein supplementation and inclusion of rumen‐protected fat in the finishing diet on nutrient digestibility and expression of intestinal genes in Nellore steers

Scope of Exogenous Enzymes in Enhancing Ruminant Productivity

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