The beneficial effects of a microbial feed phytase in diets of broiler chickens and ducklings

Farrell, DJ; Martin, Ernesto A.; Preez, J. J. Du; Bongarts, M.; Betts, Marissa J.; Sudaman, A.; Thomson, E.

doi:10.1111/j.1439-0396.1993.tb00815.x

Cited by 53 publications

(15 citation statements)

References 9 publications

(2 reference statements)

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“…The magnitude of increment was comparable with those reported by Selle et al, 12 but lower than those reported by Farrell et al 13 in sorghum-based diets. Farrell et al 13 reported that addition of 750 FTU kg −1 phytase to sorghum-soy broiler diets improved AME n by Significant improvements in AME and AME n values of maize (2.3 and 2.6%, respectively) by the phytase addition were observed in the present study. The magnitude of improvements was comparable with those reported previously.…”

Section: Discussionsupporting

confidence: 62%

Influence of exogenous enzyme supplementation on energy utilisation and nutrient digestibility of cereals for broilers

Ravindran

Hendriks

2004

J Sci Food Agric

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The influence of a microbial phytase, produced by solid-state fermentation, on the apparent metabolisable energy and ileal digestibility of phosphorus, nitrogen and starch in sorghum, maize, wheat and barley was examined using 4-week-old broilers. For wheat and barley, the influence of phytase, individually or in combination with glycanases, was also evaluated. Microbial phytase improved (p < 0.05) apparent ileal phosphorus digestibility in all cereals. Phytase supplementation improved (p < 0.05) the apparent metabolisable energy of maize and barley by 2.6 and 7.8%, respectively. Numerical improvements in apparent metabolisable energy were observed in sorghum (1.9%) and wheat (2.1%), but were not statistically significant (p > 0.05). Further improvements (p < 0.05) in the apparent metabolisable energy of wheat and barley were observed when the phytase was combined with glycanases. However, the observed improvements in apparent metabolisable energy were not always associated with enhanced ileal digestibility of protein and starch.

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Section: Discussionsupporting

confidence: 62%

Influence of exogenous enzyme supplementation on energy utilisation and nutrient digestibility of cereals for broilers

Ravindran

Hendriks

2004

J Sci Food Agric

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“…0 g/kg NPP. Increased food intake with supplemental phytase in the layer has also been observed by earlier workers (Farrell et al, 1993;Cantor et al, 1994;Kornegay et al, 1994;Rama Rao et al, 1999). Food efficiency was significantly poorer in the birds fed on diets with the lowest NPP content.…”

Section: Resultssupporting

confidence: 56%

Effect of microbial phytase on production performance of White Leghorn layers fed on a diet low in non-phytate phosphorus

Panda¹,

Rao²,

Raju³

et al. 2005

British Poultry Science

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1. An experiment with 150 White Leghorn layers was conducted to examine the effect of microbial phytase supplementation of low non-phytate phosphorus (NPP) diets on egg production, eggshell quality, bone mineralisation and retention of nutrients at 32-48 weeks of age. 2. Four isonitrogenous and isocaloric diets were formulated to contain 1.2, 1.8, 2.4 and 3.0 g NPP/kg diet with the two lowest NPP (1.2 and 1.8) supplemented with microbial phytase (Biofeed Phytase, India) at 500 FTU per kg diet. Each diet was offered ad libitum to 5 replicates of 5 layers throughout the experiment. 3. Body weight gain was reduced significantly in the layers fed on the 1.2 g/kg NPP diet as compared to those given diets containing 1.8-3.0 g/kg. Addition of phytase to the 1.2 g/kg diet significantly enhanced the body weight and was comparable with those given diets containing 1.8-3.0 g/kg NPP. 4. No additional advantage resulted from enhancing the NPP levels beyond 1.8 g/kg or adding phytase to a diet containing 1.8 g/kg NPP. 5. Hen d egg production, food intake, food efficiency, shell weight, shell thickness, shell strength and tibia strength followed the same trends as above. However, adding phytase to the 1.8 g/kg NPP diet significantly enhanced tibia ash. Egg weight, specific gravity and Haugh units were influenced by neither NPP concentration nor phytase supplementation. 6. Adding phytase to the 1.2 g/kg NPP diet significantly enhanced nitrogen and phosphorus retention. 7. It was concluded that addition of 500 FTU of microbial phytase/kg diet can allow the reduction of NPP content to 1.2g/kg in the layer diet, eliminate inorganic phosphorus supplementation and results in significant reduction of nitrogen and phosphorus excretion without affecting the production performance of layers.

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“…Utilization of total and phytate-P was significantly improved by microbial phytase. The efficiency of microbial phytase in diets for broiler chickens and ducklings was evaluated by Farrell et al (1993), using growth rate, feed intake, phosphorus retention and tibia ash percentage as main response parameters. In both experiments, microbial phytase showed positive effects on the used experimental parameters.…”

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confidence: 99%

Influence of L-lactic acid on the efficacy of microbial phytase in broiler chickens

Zobac¹,

Kumprecht²,

Suchý³

et al. 2004

CZECH J ANIM SCI

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Poultry diets contain mainly feeds of vegetable origin, such as cereal grains, extracted oilseed meals and cereal by-products. These feed ingredients provide a high proportion of total phosphorus (P), but only 20 to 30% of this P are available to the birds, because it is bound in phytate form. Such non-utilized phytate P is transferred with poultry excreta to soil and water and a�er the release it causes adverse effects on the environment. Enzymatic hydrolysis of phytate by the specific enzyme, phytase, results in release and improved utilization of phytate-bound P in the digestive tract, thus leading to a reduced P ABSTRACT: Two growth trials and a short-term metabolism trial were conducted in broiler chickens in the period of 22 to 42 days of age in order to evaluate the effects of two dietary levels of L-lactic acid (1.03 or 2.06 g/kg) and microbial 6-phytase (750 U/kg), added either separately or in combination, on growth rate, feed conversion, dressing percentage and utilization of selected nutrients. In the first growth trial, six different dietary treatments were added to a basal grower diet containing 19.4% crude protein and a reduced level of dietary phosphorus (P) (5.9 g total and 2.9 g non-phytate P per kg). Single administration of L-lactic acid did not show any positive effect on the growth rate or feed conversion. In contrast, phytase addition to a low-P grower diet resulted in the increased final weight of birds and higher feed conversion. This beneficial effect was markedly stronger when the microbial phytase was added to the diets containing L-lactic acid. Based on two-factor analysis of variance, microbial phytase significantly increased the mean final weight by 6.5% (P < 0.01) and significantly improved feed conversion from 1.877 to 1.829 (P < 0.05).In the second growth trial, the same six dietary treatments were added to a basal diet containing a standard level of dietary P (6.7 g total and 4.0 g non-phytate P per kg), but the level of crude protein was reduced to 17.0%. L-lactic acid alone did not show any positive effects on performance. Phytase supplementation alone resulted in numerical improvement of the final weight (+1.1-2.4%), but a higher effect was observed in the diets containing L-lactic acid. In agreement with the reduced final weights of broilers fed the low-protein diets, markedly higher values of feed/gain ratio were noted. In the metabolism trial, selected dietary treatments were involved to evaluate the effects of L-lactic acid and microbial phytase, added either separately or in combination, on the digestibility of nitrogen (N) and fat as well as on the retention and excretion of N and P. Apparent digestibility of N and fat in the low-P diets was not affected by dietary treatments. Retention and utilization of N were numerically higher in all treatments fed low-P diets when compared to the treatment fed a standard diet, but the differences were not significant. Retention of P was numerically higher in all treatments fed low-P diets. When compared to the standard diet, the c...

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The beneficial effects of a microbial feed phytase in diets of broiler chickens and ducklings

Cited by 53 publications

References 9 publications

Influence of exogenous enzyme supplementation on energy utilisation and nutrient digestibility of cereals for broilers

Influence of exogenous enzyme supplementation on energy utilisation and nutrient digestibility of cereals for broilers

Effect of microbial phytase on production performance of White Leghorn layers fed on a diet low in non-phytate phosphorus

Influence of L-lactic acid on the efficacy of microbial phytase in broiler chickens

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