&lt;b&gt;Carbohydrase and phytase supplementation in diets for semi-heavy laying hens

Geraldo, Adriano; Gomes, Karina Rodrigues Aurora; Fassani, Édison José; Bertechini, Antônio Gilberto; Simão, Sérgio Domingos; Nogueira, Filipe Soares

doi:10.4025/actascianimsci.v36i3.21952

Cited by 4 publications

(3 citation statements)

References 17 publications

(6 reference statements)

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“…Total BMC and cortical, trabecular + medullary, and total BMD were lower in the NC hens than in the PC hens, indicating that the NC hens started mobilizing bone mineral to support eggshell formation, maintain egg production and performance. Laying hens are able to physiologically adapt to P- and Ca-reduced diets and maintain performance, depending on the degree of nutrient deficiency ( Boling et al., 2000 , Nie et al., 2013 , Geraldo et al., 2014 ) and varying with strains ( Hughes et al., 2009 ). Phytase supplementation to the NC diets did not fully restore total BMD and BMC to the level of the PC treatment.…”

Section: Discussionmentioning

confidence: 99%

Effects of phytase supplementation on eggshell and bone quality, and phosphorus and calcium digestibility in laying hens from 25 to 37 wk of age

2020

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Effects of dietary available phosphorus ( aP ) and Ca levels and an Escherichia coli 6-phytase supplementation were studied in Lohmann LSL-Lite hens from 25 to 37 wk of age. Eighty-four hens were used in a completely randomized design with 7 treatments. The treatments were a positive control ( PC ) diet with 0.45% aP, 3.70% Ca, and 0.16% Na from 25 to 28 wk and 0.38% aP, 3.73% Ca, and 0.15% Na from 29 to 37 wk; a negative control ( NC ) diet, similar to the PC diet, with 0.22% aP, 3.00% Ca, and 0.13% Na from 25 to 28 wk and 0.19% aP, 3.02% Ca, and 0.13% Na from 29 to 37 wk; the NC diets supplemented with phytase at 150 (NC + 150), 300 (NC + 300), 600 (NC + 600), or 1,200 (NC + 1,200) phytase unit ( FTU )/kg; and the PC diet supplemented with phytase at 1,200 (PC + 1,200) FTU/kg. Hen performance, eggshell, and bone quality were measured on a 4-wk basis. Bone breaking strength and ash and apparent ileal digestibility ( AID ) of P and Ca were determined at 37 wk. One- and 2-way ANOVA were conducted, and Tukey's range test was used to compare multiple means where P ≤ 0.05. No differences in hen performance, eggshell quality, bone breaking strength, bone ash, and P digestibility were observed between the PC and the NC treatments. The NC hens had lower cortical ( P < 0.001) and trabecular + medullary bone mineral density ( P = 0.004) and total bone mineral content ( P < 0.001) than the PC hens. The PC + 1,200 increased cortical bone mineral density ( P < 0.001). The reductions of aP and Ca in the NC diet were not deficient for performance but had a minor impact on bone mineralization. The NC + 600 and NC + 1,200 increased AID of P ( P = 0.024), and all phytase treatments except the NC + 150 increased AID of Ca ( P = 0.010) compared with the NC diet.

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Section: Discussionmentioning

confidence: 99%

Effects of phytase supplementation on eggshell and bone quality, and phosphorus and calcium digestibility in laying hens from 25 to 37 wk of age

2020

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“…Os autores observaram que dietas com redução nutricional e com maior inclusão enzimática também proporcionou aumento no consumo. GERALDO et al (2014) realizaram um estudo utilizando complexo enzimático de carboidrases (α-galactosidase, galactomananase, β-glucanase e xilanase) e fitase observaram interação significativa entre tratamentos e períodos experimentais para a variável consumo de ração onde, aves expostas a dietas com níveis nutricionais reduzidos consumiram mais ração. Os pesquisadores concluíram que a redução dos níveis nutricionais, seja com inclusão de enzimas ou não, não proporcionaram resultados satisfatórios para as variáveis conversão alimentar e consumo de ração.…”

Section: Resultsunclassified

“…Em situações diferentes e, avaliando diferentes produtos enzimáticos, MURAKAMI et al (2007), GERALDO et al (2014) e VIEIRA FILHO et al (2015 observaram efeitos da inclusão de enzimas sobre a CA. Resultado contrário foi observado por OBA et al (2013) que não observaram diferença significativa quanto a CA utilizando complexo composto por fitase, celulase, pectinase, β-glucanase, protease, xilanase e amilase.…”

Section: Table 3 -unclassified