Efficacy and Metabolizable Energy Equivalence of an α-Amylase-β-Glucanase Complex for Broilers

Vieira, S. L.; Stefanello, C.; Rios, Heitor Vieira; Serafini, Natália Chaves; Hermes, RG; Sorbara, J. O. B.

doi:10.1590/1516-635x1702227-236

Cited by 15 publications

(6 citation statements)

References 31 publications

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“…The present study showed that exogenous amylase supplementation of diets improved the growth performance response of broiler chickens. This observation is similar to previous reports ( Onderci et al., 2006 ; Vieira et al., 2015 ; Stefanello et al., 2019 ) for broilers fed amylase-supplemented, corn–SBM–based diets. Likewise, Ritz et al.…”

Section: Discussionsupporting

confidence: 92%

Growth phase and dietary α-amylase supplementation effects on nutrient digestibility and feedback enzyme secretion in broiler chickens

et al. 2020

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Growth performance, nutrient digestibility, intestinal health, and endogenous enzyme secretion responses to dietary α-amylase supplementation during 4 growth phases of broiler chickens fed corn–soybean meal–based diets were evaluated in the present study. A total of 1,136 male broiler chicks were assigned at day 0 after hatching to 8 treatments in a 2 × 4 factorial arrangement. There were 2 dietary levels of α-amylase supplementation of 0 or 80 kilo-Novo alpha amylase units per kg diet and 4 posthatching growth phases of day 0 to 11, day 11 to 21, day 21 to 42, or day 42 to 56 in a randomized complete block design. Each treatment comprised 8 replicate pens, with either 25 (day 0–11), 20 (day 11–21), 16 (day 21–42), or 10 (day 42–56) birds per pen. Body weight gain and feed efficiency of birds improved ( P < 0.01) with α-amylase supplementation. There were main effects of α-amylase, growth phase, and interaction ( P < 0.01) on apparent ileal digestibility ( AID ) of starch. This ranged from 0.8% during day 11 to 21 to 2.8% during day 0 to 11 after hatching. The total tract retention of starch increased ( P < 0.05) with amylase supplementation but was not different across growth phases. Amylase supplementation increased ( P < 0.05) AID of gross energy, AME (kcal/kg), and AMEn (kcal/kg). Villus height in the jejunal tissue was increased ( P < 0.01) by α-amylase supplementation. During day 11 to 21 after hatching, the viscosity of jejunal digesta and pancreatic amylase activity increased ( P < 0.01) with amylase supplementation. In conclusion, dietary amylase supplementation improved growth performance, apparent nutrient digestibility, and digestive enzyme activity of broiler chickens fed a corn–soybean diet. The study indicates that the growth phase of birds may affect response to exogenous amylase.

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Section: Discussionsupporting

confidence: 92%

Growth phase and dietary α-amylase supplementation effects on nutrient digestibility and feedback enzyme secretion in broiler chickens

et al. 2020

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“…Furthermore, it has been reported that supplemental amylases could improve fat digestibility ( Yuan et al., 2017 ). This suggests that growth performance responses by exogenous enzymes may not always be solely related to greater degradation of the target substrates ( Vieira et al., 2015 ) and could partly explain our observation.…”

Section: Discussionmentioning

confidence: 84%

Intestinal starch and energy digestibility in broiler chickens fed diets supplemented with α-amylase

et al. 2020

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Dietary starch is the major energy source for broiler chickens; therefore, relevant information on its intestinal utilization is important. The present study was designed to evaluate intestinal starch and energy digestibility of broiler chickens fed diets supplemented with α-amylase. A total of 240 day-0 male broiler chicks were randomly assigned to 3 nutritionally adequate corn-soybean–based experimental diets comprising 3 levels of α-amylase supplementation (0, 80, or 160 KNU/kg diet). Each treatment comprised 8 replicate cages of 10 birds each. At day 21 after hatching, digesta was collected from 4 intestinal sites: the anterior jejunum ( AJ ), posterior jejunum ( PJ ), anterior ileum ( AI ), and posterior ileum. Increasing α-amylase supplementation linearly improved ( P < 0.01) overall BW gain and feed efficiency of the birds. There were linear and quadratic ( P < 0.01) responses of increasing α-amylase supplementation on starch and energy digestibility at the PJ and AI. The total tract digestibility of starch increased ( P < 0.05) with increasing α-amylase supplementation. Starch disappearance and digestible energy (kcal/kg) linearly increased ( P < 0.01) with digesta flow from the AJ to PJ as dietary α-amylase supplementation increased. There were linear ( P < 0.01) and quadratic ( P < 0.05) effects of increasing α-amylase supplementation on the villus height in the jejunum. The viscosity of the jejunal digesta decreased ( P < 0.05) with increasing dietary α-amylase supplementation. The results from this study showed the efficacy of exogenous amylase in improving growth performance and starch and energy digestibility in broiler chickens. Furthermore, the digestibility of starch and energy and the impact of the exogenous amylase were higher at the PJ than other intestinal sites.

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“…The lack of beneficial effect of enzymes on the weight gain demonstrates that the changes promoted in NC1, NC2 and NC3 diets may not be suitable for all the periods, since even with improved digestibility promoted by the use of enzymes, the weight gain of birds was not similar to the control diet, considering the period 1-42 days. In studies conducted by Vieira et al (2015), the inclusion of an enzymatic product composed of amylase and glucanase in diets with a reduction of 120 kcal kg weight gain of broiler chickens in the 1-40 day period, but it was not efficient to recover the weight gain similar to that of a diet that meets the requirements of birds. Mean values followed by different letters in the same column are significantly different (5%); CV: coefficient of variation.…”

Section: Resultsmentioning

confidence: 99%

“…Several studies have indicated that the inclusion of exogenous enzymes in broiler diets does not affect feed intake (Cardoso et al, 2011;Lu et al, 2013;Vieira et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

<b>Performance and economic viability of broiler chicken fed diets with multienzyme complexes

Pasquali

Oliveira

Aiello

et al. 2017

Acta Sci. Anim. Sci.

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ABSTRACT. This study evaluated the effect of multienzyme complexes (EC1 and EC2) in low nutritional density diets on performance and economic viability of broilers. A total of 840 day-old chicks were assigned to 7 treatments, distributed in a completely randomized design: (1) PC: positive control, basal diet formulated to meet nutritional requirements; (2) NC1: negative control, reduced energy and nutrient density diet without enzymes; (3) NC1+EC1; (4) NC2: negative control, diet formulated with 7% over-estimated crude protein and amino acids of soybean meal without enzymes; (5) NC2+EC2; (6) NC3: negative control, reduced energy and nutrient density diet and over-estimation of crude protein and amino acids of soybean meal; (7) NC3+EC1+EC2. Feeding NC1 or NC3 impaired feed conversion ratio at 7, 21 and 42 days, and NC2 at 21 days. Inclusion of EC2 in NC2 diet improved feed conversion ratio and kept it similar to basal diets from 1 to 21 days. Association of EC1 with EC2 in NC3 diet did not improve performance. In summary, inclusion of EC2 in diets with reduced nutrient density keep feed conversion ratio similar to basal diets from 1 to 21 days but does not improve performance of broiler chicken from 1 to 42 days post-hatch.Keywords: exogenous enzymes, poultry, enzyme complexes.Desempenho e viabilidade econômica com utilização de complexos enzimáticos em dietas para frangos de corte RESUMO. Avaliou-se o efeito da inclusão de complexos enzimáticos (CE1 e CE2) em dietas com níveis reduzidos sobre desempenho e viabilidade econômica de frangos. Foram utilizados 840 pintos, distribuídos em delineamento inteiramente casualizado com sete tratamentos e quatro repetições: 1) controle positivo (CP), dieta formulada para atender às exigências nutricionais; 2) controle negativo 1 (CN1), dieta com níveis nutricionais reduzidos; 3) CN1+CE1; 4) CN2: dieta com proteína e aminoácidos do farelo de soja valorizados em 7%; 5) CN2+CE2; 6) CN3: dieta com níveis reduzidos, e farelo de soja valorizado em 7% para proteína e aminoácidos; 7) CN3+CE1+CE2. A conversão alimentar foi maior em aves que receberam dietas CN1 ou CN3 aos sete, 21 e 42 dias, e CN2 aos 21 dias. A inclusão de CE2 na dieta CN2 melhorou a conversão alimentar em relação a CN2, tornando-a semelhante à de aves alimentadas com dieta CP aos 21 dias. A associação de CE1+CE2 na dieta CN3 não favoreceu o desempenho. Portanto, o uso de complexo enzimático (CE2) em dieta com níveis reduzidos mantém a conversão alimentar similar à de aves recebendo dieta-padrão no período de um a 21 dias, porém, no período de um a 42 dias, não melhora o desempenho de frangos.Palavras-chave: enzimas exógenas, aves, complexos multienzimáticos.

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Efficacy and Metabolizable Energy Equivalence of an α-Amylase-β-Glucanase Complex for Broilers

Cited by 15 publications

References 31 publications

Growth phase and dietary α-amylase supplementation effects on nutrient digestibility and feedback enzyme secretion in broiler chickens

Growth phase and dietary α-amylase supplementation effects on nutrient digestibility and feedback enzyme secretion in broiler chickens

Intestinal starch and energy digestibility in broiler chickens fed diets supplemented with α-amylase

<b>Performance and economic viability of broiler chicken fed diets with multienzyme complexes

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