Efficacy of an evolved Escherichia coli phytase in diets of broiler chicks

Onyango, E. M.; Bedford, M. R.; Adeola, O.

doi:10.1093/ps/84.2.248

Cited by 120 publications

(72 citation statements)

References 27 publications

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“…The mechanisms by which heat treatment improves P availability are, however, not yet known. The AID of P was improved by phytase supplementation of the NC-M or NC-P diets, which is in agreement with results from several previous studies (Shirley and Edwards 2003;Dilger et al 2004;Onyango et al 2005;Olukosi et al 2007), and it is due to the hydrolysis of phytate by phytase (Bedford 2000;Selle and Ravindran 2007). The AID of P responded linearly to increasing levels of supplemental phytase from 0 to 700 FTU kg…”

Section: Discussionsupporting

confidence: 91%

Thermo-stable Escherichia coli phytase improves growth performance and nutrient utilization in broilers fed mash and pelleted corn-soybean-meal-based diets

Woyengo¹,

Emiola²,

Owusu-Asiedu³

et al. 2010

Can. J. Anim. Sci.

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. 2010. Thermo-stable Escherichia coli phytase improves growth performance and nutrient utilization in broilers fed mash and pelleted corn Á soybean-meal-based diets. Can. J. Anim. Sci. 90: 529Á536. The bio-efficacy of Escherichia coli-derived phytase produced by thermo-protective coating technology (coated phytase) was evaluated in mash or pelleted broiler diets. Three hundred and twenty-four broilers were divided into 54 groups of six birds and fed nine corn-based diets (six replicates per diet) from 1 to 22 d of age. The nine diets were a positive control (PC) (calcium, 0.9% and non-phytate phosphorus, 0.45%) fed as mash plus 2 )4 factorial of a negative control (calcium, 0.78% and non-phytate phosphorus, 0.26%) fed as mash (NC-M) or pellet (NC-P) and with coated phytase at 0, 500, 600 or 700 FTU kg (1 . The diets were pelleted at 808C, and pressure load of 40 psi. Body weight gain (BWG) for the PC diet was higher (PB0.001) than that for the NC-M or NC-P diet. The BWG and tibia ash were linearly increased (PB0.001) by increased level of the phytase in NC-M or NC-P diet. The BWG for NC-M or NC-P diet reached that of the PC diet when phytase was supplemented at 600 or 700 FTU kg (1 . In conclusion, the coated phytase improved nutrient utilization in broilers, and its bio-efficacy was unaffected by the pelleting process.Key words: Broiler, digestibility, pelleting, performance, thermostable-phytase Woyengo, T. A., Emiola, A., Owusu-Asiedu, A., Guenter, W., Simmins, P. H. et Nyachoti, C. M. 2010. La phytase thermostable d'Escherichia coli ame´liore la croissance et l'assimilation des aliments chez les poulets de chair nourris de paˆte´e ou d'agglome´re´s de maı¨s et de tourteau de soja. Can. J. Anim. Sci. 90: 529Á536. Les auteurs ont e´value´l'efficacite´biologique de la phytase d'Escherichia coli pre´pare´e avec un enduit thermoprotecteur (phytase enrobe´e) quand on s'en sert pour enrichir la ration en paˆte´e ou en agglome´re´s des poulets de chair. Trois cent vingt-quatre poulets de chair ont e´te´re´partis en 54 groupes de six et ont rec¸u neuf rations a`base de maı¨s (six re´pe´titions par ration) du 1 er au 22 e jour. Les neuf rations e´taient les suivantes : ration te´moin positive (0,9% de calcium et 0,45% de phosphore non phytique) sous forme de paˆte´e (PC), plus re´partition factorielle 2 )4 de rations te´moin ne´gatives (0,78% de calcium et 0,26% de phosphore non phytique) sous forme de paˆte´e (NC-M) ou d'agglome´re´s (NC-P) enrichies avec 0, 500, 600 ou 700 FTU de phytase enrobe´e par kg. Les rations ont e´te´agglome´re´es a`une tempe´rature de 808C et a`une pression de 40 livres au pouce carre´. La ration PC accroıˆt plus (PB0,001) le gain de poids corporel (GPC) que les rations NC-M ou NC-P. Le GPC et le poids des cendres du tibia augmentent de fac¸on line´aire (P B0,001) avec la concentration de phytase dans la ration NC-M ou NC-P. Le GPC des oiseaux nourris avec la ration NC-M ou NC-P atteint un niveau e´quivalent a`celui obtenu avec la ration PC de`s que le supple´ment de phytase atteint 600 ou...

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Section: Discussionsupporting

confidence: 91%

Thermo-stable Escherichia coli phytase improves growth performance and nutrient utilization in broilers fed mash and pelleted corn-soybean-meal-based diets

Woyengo¹,

Emiola²,

Owusu-Asiedu³

et al. 2010

Can. J. Anim. Sci.

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“…Changes in the amount of P available to the animal may affect its bone mineral status. This is the reason for the use of percentage bone ash as an indicator of mineral adequacy in animals [12]. As other experiment carried out by japanese quail, addition of phytase enzyme to the diet improved ash and P of bird bon [13].…”

Section: Resultsmentioning

confidence: 92%

Effects of Supplemental Dietary Phytase on Performance and Blood Biochemical Parameter of Broiler Chicks

Jalali¹,

Babaei²

2012

IJBBB

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Abstract-An experiment was conducted to study the effects of phytase enzyme on performance, blood biochemical parameter and tibia ash content of broiler chicks. Two hundred eighty Ross broiler chicks were located randomly to seven experimental diets at four replicates (cages) and fed from 5 to 28 days of age. A positive control diet (0.422% non-Phytate Phosphorus, nPP) and a negative control diet (0.316% nPP) were used, and five more diets were manufactured by supplementing the negative control diet with 300, 600, 1,200, 2,400, and 24,000 FTU/kg of exogenous phytase (Phyzyme XP). The addition of exogenous phytase above 600 FTU/kg and 1200 FTU/kg improved (P<0.05) feed conversion ratio and body weight gain of the birds fed the negative control diet, respectively. Decreasing nPP content in the diet reduced tibia ash (P<0.001) content and phytase supplementation increased it (P<0.001) as logarithmic liner equation. Phosphorus concentration of serum chicks fed negative control diet was reduced and phytase supplementation above 600 FTU/kg increased it. However, negative control diet increased alkaline phosphatase activity of serum and addition of phytase above 2400 FTU/kg reduced its activity to level of positive control diet (P<0.01). Albumin concentration of serum chicks was increased by addition of phytase above 600 FTU/kg diet. The lowest calcium content and highest total protein concentration of serum chicks were seen at treatment of 600 FTU/kg phytase. These results demonstrated that addition of 600 FTU/kg phytase to low-available phosphorus diets (75% of NRC recommended) improved performance of broiler chicks due to improve utilization of phytate phosphorus of corn-soy bean meal diets.

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“…Juanpere et al (2004) avaliaram os níveis de 0,45 e 0,27% de FNF, também com e sem fitase, e verificaram que a EMA diminuiu com a redução do FNF. Pourreza e Classen (2001) e Onyango et al (2005), ao avaliarem dietas com níveis de fitase que variavam de 0 a 1200U/kg e com 0,27% de FNF, respectivamente, não encontraram diferenças nos valores de EMA em função dos níveis de enzima e/ou FNF.…”

Section: Methodsunclassified

Utilização de nutrientes em frangos alimentados com dietas suplementadas com fitase e níveis reduzidos de fósforo não-fítico

Oliveira¹,

Gravena

Marques

et al. 2008

Arq. Bras. Med. Vet. Zootec.

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Avaliaram-se a digestibilidade ileal, retenção de nutrientes e valores de energia metabolizável aparente (EMA) de dietas suplementadas com fitase e níveis reduzidos de fósforo não-fítico (FNF) para frangos de corte. Foram utilizados 330 pintos machos em delineamento em blocos ao acaso e esquema fatorial 2 x 3 com dois níveis de fitase (0 e 25U/kg) e três níveis de FNF (100, 85 e 70% das exigências da ave), totalizando seis tratamentos com cinco repetições de 11 aves cada. Não houve efeito da interação FNF vs fitase e dos níveis de FNF ou fitase sobre a retenção de matéria seca e de fósforo, e a interação FNF vs fitase foi significativa para retenção de proteína bruta e coeficiente de digestibilidade ileal da matéria seca. A suplementação com fitase, independente dos níveis de FNF, melhorou o coeficiente digestibilidade ileal da proteína bruta, do cálcio e do fósforo. A retenção de cálcio e a redução dos níveis de FNF diminuíam a metabolização da energia bruta das dietas com 85 e 70% das exigências de FNF. Dietas com nível de 70% das exigências de FNF, suplementadas com fitase, podem ser usadas para frangos de corte sem prejuízos à digestibilidade ileal e retenção da matéria seca, proteína bruta, cálcio e fósforo e à metabolização da energia bruta.

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Efficacy of an evolved Escherichia coli phytase in diets of broiler chicks

Cited by 120 publications

References 27 publications

Thermo-stable Escherichia coli phytase improves growth performance and nutrient utilization in broilers fed mash and pelleted corn-soybean-meal-based diets

Thermo-stable Escherichia coli phytase improves growth performance and nutrient utilization in broilers fed mash and pelleted corn-soybean-meal-based diets

Effects of Supplemental Dietary Phytase on Performance and Blood Biochemical Parameter of Broiler Chicks

Utilização de nutrientes em frangos alimentados com dietas suplementadas com fitase e níveis reduzidos de fósforo não-fítico

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