Growth performance and carcass yield of broiler chickens in response to carbohydrases and its association with phytase

Dessimoni, G.V.; Sakomura, Nilva Kazue; Donato, Daniella Carolina Zanardo; Soares, Letícia; Sarcinelli, M. F.; Malheiros, Euclides Braga; Dalólio, Felipe Santos

doi:10.1590/1678-4162-10345

Cited by 1 publication

(2 citation statements)

References 24 publications

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“…Due to their reduced ME and/or amino acid levels, the diets with or without enzymes were expect to promote changes in FI. According to Dessimoni et al (2019), birds tend to increase their FI in an attempt to compensate for the nutrient deficit. As stated by Gopinger, Krabbe, Surek, Lopes and Avila (2017), FI in broilers is increased with a reduction in the dietary DM.…”

Section: Resultsmentioning

confidence: 99%

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Xylanase and β-glucanase in maize- and soybean meal-based diets for broilers

Diana

Albino

Rostagno

et al. 2020

Semina: Ciênc. Agrár.

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The objective of this study was to evaluate the effect of adding different xylanase and ?-glucanase enzyme blends to maize- and soybean meal-based diets on performance and energy metabolizability in broilers. Two experiments were carried out with broilers of the COBB 500 strain. In the first experiment, 1960 chicks were assigned to a completely randomized design with a 2 × 3 + 1 factorial arrangement, totaling seven treatments, namely, T1- Positive control (PC); T2 - Negative control 1 (NC1; PC minus 200 kcal kg-1 ME); T3 - NC1 + Blend A; T4 - NC1 + Blend B; T5 - Negative control 2 (NC2; PC minus 167 kcal kg-1 ME and 5% amino acids); T6 - NC2 + Blend A; and T7 - NC2 + Blend B. Fourteen replicates were used per treatment and 20 birds per experimental unit. The parameters evaluated at 21 and 42 days of age were weight gain (WG), feed intake (FI) and feed conversion (FC). At 42 days, production efficiency index (PEI), viability and the yields of cuts were also calculated. Birds that received diets with a reduced nutritional value showed a reduction in WG and PEI and worsened FC as compared those of PC treatment (p < 0.05). However, the birds that consumed the NC2 diet with Blend B exhibited a similar WG to those in PC group (p > 0.05) from 1 to 21 days of life. For the yield of thigh + drumstick, the factors were statistically similar (p > 0.05) to those observed in the PC birds. In the second experiment, 432 fourteen-day-old chicks were distributed in a completely randomized design with seven treatments, with eight replicates per treatment and six birds per experimental unit. The apparent metabolizable energy (AME) and nitrogen-corrected AME (AMEn) values were determined. Overall, the NC2 diet with Blend B provided the highest AME and AMEn values; however, NC1 with the same enzyme blend was the treatment which provided the lowest values. The addition of xylanase and ?-glucanase enzyme blends to maize- and soybean meal-based diets improves WG at 21 days as well as PEI in broilers; however, it does not influence the yield of cuts. Enzymes (Blend B) improve the energy metabolization of broiler diets with reduced energy and amino acid levels.

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Section: Resultsmentioning

confidence: 99%

“…The lack of significant effects on performance demonstrated in some studies can be explained by the low NSP content of maize-and soybean meal-based diets. The activity of enzymes is directly related to the type of substrate contained in the gastrointestinal tract of birds (Woyengo & Nyachoti, 2011;Meneghetti, 2013;Dessimoni et al, 2019).…”

Section: Tablementioning

confidence: 99%