Effects of dietary phytase on performance and nutrient metabolism in chickens

Pirgozliev, V.; Oduguwa, O. O.; Acamovic, T.; Bedford, M.R.

doi:10.1080/00071660801961447

Cited by 45 publications

(25 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Likewise, FI of ducks on diets containing 500, 1,000, or 1,500 units of phytase per kilogram of diet increased by 6, 34, or 35%, respectively, relative to the NC diet. In a variety of studies, similar improvements in growth performance of ducks (Orban et al, 1999;Rodehutscord et al, 2003Rodehutscord et al, , 2006 or broiler chicks (Adedokun et al, 2004;Dilger et al, 2004;Pirgozliev et al, 2008) when low-P diets are supplemented with inorganic P or phytase have been reported.…”

Section: Discussionmentioning

confidence: 81%

Phosphorus equivalency value of an Escherichia coli phytase in the diets of White Pekin ducks

Adeola

2010

Poultry Science

View full text Add to dashboard Cite

Male White Pekin ducks at 7 d posthatch were used in a 10-d experiment to determine the equivalency value of an Escherichia coli phytase (Phyzyme XP) in corn-soybean meal-based mash diets. Two hundred fifty-six ducks were grouped by weight into 8 blocks of 8 cages with 4 ducks per cage. The 8 diets consisted of a P-adequate positive control corn-soybean meal formulated to contain CP, Ca, total P, and nonphytate P at 220, 8, 6.6, and 4 g/kg, respectively; a low-P negative control (NC) corn-soybean meal basal diet formulated to contain CP, Ca, total P, and nonphytate P at 220, 6.5, 3.9, and 1.3 g/kg, respectively; NC diet plus 0.5, 1.0, or 1.5 g of inorganic P from monosodium phosphate/kg; and NC diet plus E. coli phytase at 500, 1,000, or 1,500 units/kg. Ducks were provided ad libitum access to water and experimental diets. Feeding the low-P NC diet to ducks reduced (P<0.01) BW gain, feed intake, G:F, tibia ash, ileal digestibility, and utilization of P. Supplementation of the NC diet with inorganic P or phytase linearly improved (P<0.01) final weight, BW gain, feed intake, G:F, tibia ash, and ileal P digestibility. There were linear increases (P<0.01) in the utilization of P from 33.8 to 42% or from 33.8 to 46.6% as dietary added inorganic P or phytase increased from 0 to 1.5 g/kg or 0 to 1,500 units/kg, respectively. Linear regression equations for the tibia ash as the dependent variable and supplemental intake of inorganic P and phytase or supplemental level of inorganic P and phytase as independent variables were used to generate P equivalency values of phytase. The mean P equivalency values of phytase from linear regression equations derived from ducks fed a low-P NC diet supplemented with graded levels of inorganic P or phytase from d 7 to 17 posthatch for 500, 1,000, and 1,500 phytase units/kg of diet were 0.453, 0.847, and 1.242 g/kg of diet, respectively. The results of this study showed that this phytase was efficacious in hydrolyzing phytate P for bone mineralization and growth of ducks.

show abstract

Section: Discussionmentioning

confidence: 81%

Phosphorus equivalency value of an Escherichia coli phytase in the diets of White Pekin ducks

Adeola

2010

Poultry Science

View full text Add to dashboard Cite

show abstract

“…Increasing the level of supplemental phytase beyond 1,000 FTU/kg had no advantages on growth performance and bone mineralization. Pirgozliev et al [41] concluded that birds can tolerate phytase concentrations much higher than 1,000 units/kg of diet and that these concentrations had further beneficial effects compared with lower concentrations. Cabahug et al [39] and Ravindran et al [42] reported that bird performance and toe ash content were improved by phytase addition, but they observed no significant differences in these responses between the addition of phytase at 400 and 800 FTU/kg of diet.…”

Section: Bone Mineralizationmentioning

confidence: 97%

Effects of a thermostable phytase on the growth performance and bone mineralization of broilers

Tang

Gao

et al. 2012

Journal of Applied Poultry Research

View full text Add to dashboard Cite

“…Feeding phytase did not have an effect on dietary AME in this study. However, changes in dietary AME due to phytase supplementation are relatively small (Selle and Ravindran, 2007) and not always significant (Pirgozliev et al., 2008). The improvement in the amino acid retention due to dietary phytase was expected (Selle and Ravindran, 2007; Cowieson et al., 2009).…”

Section: Discussionmentioning

confidence: 99%

The effect of supplementary bacterial phytase on dietary metabolisable energy, nutrient retention and endogenous losses in precision fed broiler chickens

Pirgozliev¹,

Bedford

Oduguwa

et al. 2011

Animal Physiology Nutrition

Self Cite

View full text Add to dashboard Cite

Thirty-two Ross 308 male broiler chickens were used in a precision feeding assay to investigate the effect of exogenous phytase (EC 3.1.3.26) on dietary apparent metabolisable energy (AME), dry matter digestibility (DMD) coefficient, nitrogen (NR), amino acid and mineral retentions. The excretion of endogenous losses measured as sialic acid (SA) was also determined. Four dietary treatments (control (C), C + 250 FTU (phytase units per kg feed), C + 500 FTU, and C + 2500 FTU) were studied with each treatment replicated eight times in randomised complete block design. Diets were formulated to be nutritionally adequate with the exception of available P content (2.3 g/kg non-phytate P). Over the 48-h collection period, the phytase fed birds retained 29.3 mg more Na and 2.3 mg more Zn (p < 0.05) than the control fed birds, with the relationship between phytase dose and Na and Zn retention being best described by a linear function (p < 0.05 and p < 0.001, for Na and Zn, respectively). Phytase supplementation did not have an effect on dietary AME, DMD and NR. However, increasing the dose of phytase led to a linear increase in dietary amino acid retention (p < 0.05). Dietary phytase decreased total sialic acid excretion in a linear fashion (p < 0.05). It can be concluded that supplementary phytase increases the retention (reduces the excretion) of dietary Zn and Na in broiler chickens. The beneficial effects of the addition of exogenous phytases to poultry diets seems to be mediated through improved dietary nutrients absorption and reduced endogenous losses.

show abstract

Effects of dietary phytase on performance and nutrient metabolism in chickens

Cited by 45 publications

References 51 publications

Phosphorus equivalency value of an Escherichia coli phytase in the diets of White Pekin ducks

Phosphorus equivalency value of an Escherichia coli phytase in the diets of White Pekin ducks

Effects of a thermostable phytase on the growth performance and bone mineralization of broilers

The effect of supplementary bacterial phytase on dietary metabolisable energy, nutrient retention and endogenous losses in precision fed broiler chickens

Contact Info

Product

Resources

About