Influence of inclusion level of barley in wheat-based diets and supplementation of carbohydrase on growth performance, nutrient utilisation and gut morphometry in broiler starters

Perera, W.N.U.; Abdollahi, M.R.; Zaefarian, F.; Wester, T.J.; Ravindran, G.; Ravindran, V.

doi:10.1080/00071668.2019.1639142

Cited by 12 publications

(32 citation statements)

References 68 publications

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“…The presence of Carb in the diet (Carb and Carb + Phy) improved the F/G by an average of 2.5 points. Previous studies ( Bedford et al., 1991 ; Shakouri et al., 2009 ; Perera et al., 2019b , 2020 ), consistent with this finding, attributed the improvement in F/G to reduction in digesta viscosity by the action of Carb, but the viscosity effect was not observed in the current study. Amerah et al.…”

Section: Discussionsupporting

confidence: 85%

“…Regardless of barley particle size, starch digestibility was enhanced by Carb in both individual and combined supplementation, with magnitude of response of 1.51 and 1.83%, respectively. The effect of supplemental carbohydrase on enhanced starch digestibility in barley is well documented ( Bergh et al., 1999 ; Ravindran et al., 2007 ; Perera et al., 2019a , b ; 2020 ). Carbohydrase disrupts the endosperm cell wall and releases encapsulated starch granules, thus allowing them to interact unhindered with digestive enzymes.…”

Section: Discussionmentioning

confidence: 99%

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The interactive influence of barley particle size and enzyme supplementation on growth performance, nutrient utilization, and intestinal morphometry of broiler starters

et al. 2020

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The influence of barley particle size and enzyme supplementation on performance, nutrient and energy utilization, and intestinal morphometry of broiler starters (day 1–21) fed pelleted barley-based diets was evaluated. Two barley particle sizes (fine and coarse) and 4 enzyme treatments (nonsupplemented [control], carbohydrase [0.15 g/kg of feed; Carb], phytase [0.10 g/kg; Phy] and combination of carbohydrase and phytase [0.15 and 0.10 g/kg, respectively; Carb + Phy]) were evaluated in a 2 × 4 factorial arrangement. Fine and coarse barley particles were achieved by grinding whole barley in a hammer mill to pass through 2.0 and 8.0 mm screens, respectively. A total of 384, 1-day-old male broilers (8 birds/cage; 6 cages/treatment) were used. Supplemental enzymes tended ( P = 0.056) to increase the weight gain of birds with a synergetic effect from Carb + Phy. The response of feed intake to supplemental enzymes interacted ( P < 0.05) with barley particle size, as Phy increased feed intake only in fine barley diets. Both coarse particles and supplemental Carb, either individually or in combination with Phy, reduced feed per gain ( P < 0.001). Digestibility of DM, nitrogen, and fat was greater in birds fed coarse barley diets ( P < 0.05). Dry matter, starch, fat, and phosphorus digestibility values were improved by supplemental enzymes ( P < 0.05). Coarse barley ( P < 0.05) and Carb ( P < 0.001), either individually or in combination, increased the AMEn. Coarse barley reduced the gizzard pH ( P < 0.001). Birds fed diets with supplemental enzymes had shorter jejunum ( P < 0.05). Neither the barley particle size nor supplemental enzymes ( P > 0.05) affected the jejunal digesta viscosity. In summary, feeding coarse barley particles and supplemental Carb improved the feed efficiency and nutrient and energy utilization. The effects of barley particle size on measured parameters suggest that the particle size effect was preserved even after pelleting. The combination of Carb and Phy tended to improve the weight gain but caused no further improvements in nutrient utilization.

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Section: Discussionsupporting

confidence: 85%

Section: Discussionmentioning

confidence: 99%

The interactive influence of barley particle size and enzyme supplementation on growth performance, nutrient utilization, and intestinal morphometry of broiler starters

et al. 2020

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“…The influence of CT on growth performance and nutrient utilization of broilers fed corn- ( Cutlip et al, 2008 ; Abdollahi et al, 2010a , b ; Loar II et al, 2014 ), wheat- ( Abdollahi et al, 2010a , 2011 ) and sorghum- ( Abdollahi et al, 2010b ) based diets are better understood. Whilst the optimum inclusion level ( Perera et al, 2019b ) and particle size ( Perera et al, 2020b ) for barley in pelleted broiler diets have been evaluated, the optimum CT for pelleting barley-based diets remains unexplored.…”

Section: Introductionmentioning

confidence: 99%

“…The NSP-degrading enzymes are routinely added to barley-based diets to overcome the adverse effects of anti-nutritional factors, mainly the greater digesta viscosity. Improved performance and nutrient utilization from supplemental enzymes in birds fed barley-based diets are attributed mostly to the reduction of digesta viscosity ( Almirall et al, 1995 ; Perera et al, 2019b ). As high CT may exacerbate the adverse effects of viscosity in diets based on viscous grains such as barley, use of exogenous enzymes becomes even more critical ( Cowieson et al, 2005 ).…”

Section: Introductionmentioning

confidence: 99%

High steam-conditioning temperature during the pelleting process impairs growth performance and nutrient utilization in broiler starters fed barley-based diets, regardless of carbohydrase supplementation

et al. 2021

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The influence of supplemental carbohydrase ( Carb ) and conditioning temperature ( CT ) on growth performance, nutrient utilization and intestinal morphometry of broilers (d 1–21) fed barley-based diets was examined in a 2 × 3 factorial arrangement, evaluating 2 levels of Carb (0 and 150 g/tonne of feed) and three CT (60, 74, and 88°C). A total of 288, 1-day-old male broilers (8 birds/cage; 6 cages/treatment) were used. The activities of endo-1,4-β- glucanase, endo-1,3 (4)-β-glucanase and endo-1,4-β-xylanase in the Carb were 800 BGU/g, 700 BGU/g and 2,700 XU/g, respectively. On d 21, ileal digesta was collected for the determination of nutrient digestibility. There was no significant interaction between Carb and CT for any tested parameter. Supplemental Carb, regardless of CT, increased weight gain ( WG ; P < 0.05) and reduced feed per gain ( F/G ; P < 0.001) by 30 g/bird and 6.5 points, respectively. Increasing CT to 88°C reduced ( P < 0.05) WG, but increased ( P < 0.05) F/G compared to the diets conditioned at 60° and 74°C. Regardless of CT, Carb enhanced ( P < 0.05) the digestibility of starch and AMEn by 1.15% and 32 kcal/kg, respectively. Compared to the diets conditioned at 60° and 74°C, CT at 88°C reduced ( P < 0.05) digestibility of dry matter, nitrogen, phosphorus, gross energy, and AMEn. Birds fed diets conditioned at 88°C showed lower ( P < 0.05) starch digestibility compared to those fed diets conditioned at 60°C. Conditioning at 88°C increased ( P < 0.05) jejunal digesta viscosity by 10.2% compared to diets conditioned at 60° and 74°C. Overall, Carb supplementation improved WG, F/G, starch digestibility and AMEn in broilers fed barley-based diets, irrespective of CT applied. Conditioning barley-based diets at 88°C impaired the ability of birds to utilize nitrogen, starch, phosphorus and energy, and consequently deteriorated WG and F/G. The lack of significant interactions between Carb and CT indicated that negative impacts caused by high CT on bird performance and nutrient utilization occurred regardless of Carb enzyme supplementation. Supplemental Carb per se could not remedy the adverse effects of high CT.

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“…The improvement in AMEs of the enzyme-included diet may have been due to better digestion of fats (Perera et al 2019). In addition, the increase in energy values may suggest greater availability of energy, through greater availability of amino acids, as found with the inclusion of protease in this study.…”

Section: Resultsmentioning

confidence: 99%

Effect of protease supplementation on the digestibility of amino acids in animal-origin meals for broiler diets

Silva¹,

Oliveira²,

Gouveia³

et al. 2021

Czech J. Anim. Sci.

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Enzymes benefit digestion and absorption of the ingredients and their addition to an animal-origin meal (AOM) can improve its nutritional quality. This research aimed to evaluate the effect of protease on nutrient digestibility, amino acids, and metabolism of AOM energy for broilers. Four hundred and eighty broiler chickens were distributed in a completely randomized design (4 × 2 factorial scheme), eight treatments, six replicates containing 10 birds/replicate. Treatments consisted of poultry viscera meal, swine viscera meal (SVM), bovine meat and bone meal, and basal diet; with and without protease addition. Two tests were performed. In the first test, the total excreta collection method was used with birds at 13 to 20 days of age and 25% of the reference feed was replaced by AOM. In the second test, a protein-free diet was administered to birds at 21 to 24 days of age and AOM replaced 25% of the starch. The inclusion of protease increased the apparent metabolizable energy corrected for nitrogen balance of SVM by 15.99% and the apparent metabolizable crude energy by 5.7%, and it also raised the coefficient of true ileal digestibility of the amino acids in the AOMs by 5.67% on average. The inclusion of protease improved the apparent metabolizable crude energy of AOMs, apparent metabolizable dry matter of bovine meat and bone meal, coefficient of true ileal digestibility of essential amino acids, and apparent metabolizable energy corrected for nitrogen balance of SVM. Dietary supplementation of protease may be a potential strategy to improve the digestibility of amino acids for broilers, a possibility of using animal-origin meals as a protein source of diets.

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Influence of inclusion level of barley in wheat-based diets and supplementation of carbohydrase on growth performance, nutrient utilisation and gut morphometry in broiler starters

Cited by 12 publications

References 68 publications

The interactive influence of barley particle size and enzyme supplementation on growth performance, nutrient utilization, and intestinal morphometry of broiler starters

The interactive influence of barley particle size and enzyme supplementation on growth performance, nutrient utilization, and intestinal morphometry of broiler starters

High steam-conditioning temperature during the pelleting process impairs growth performance and nutrient utilization in broiler starters fed barley-based diets, regardless of carbohydrase supplementation

Effect of protease supplementation on the digestibility of amino acids in animal-origin meals for broiler diets

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