Please cite this article as: Taheri HR & Taherkhani S. 2015. Effect of phytase superdoses and citric acid on growth performance, plasma phosphorus and tibia ash in broilers fed canola meal-based diets severely limited in available phosphorus. Poult. Sci. J. 3 (1): 27-36. © 2015 PSJ. All Rights Reserved Abstract Article history: Received: September 29, 2014 Revised: January 29, 2015 Accepted: Ma...

Phytases are hydrolytic enzymes that initiate the release of phosphate from phytate In recent years the application of the phytase enzyme have been studied intensively. Phytase enzymes have a wide distribution in plants, microorganisms, and in some animal tissues. Many strategies have been developed for improving phosphate and mineral availability in feed. However in recent years, expression of...

A 43-yr-old male presented with a 6-month history of episodes of coughing, shortness of breath and fever. He suffered from dyspnoea on minor exertion. The patient worked in a cattle feed factory and noticed that he had more complaints after his working hours. His symptoms could be ascribed to hypersensitivity pneumonitis due to contact with phytase, an enzyme added to cattle feed to strengthen ...

A bacterial isolate derived from soil samples near a cattle farm was found to display extracellular phytase activity. Based on 16S rRNA sequence analysis, the strain was named Bacillus sp. T4. The optimum temperature for the phytase activity toward magnesium phytate (Mg-InsP6) was 40°C without 5 mM Ca(2+) and 50°C with 5 mM Ca(2+). T4 phytase had a characteristic bi-hump two pH optima of 6.0 to...

The experiment was conducted to determine the effect of microbial phytase in Ca deficient and available aP diets on broiler performance and some blood traits. Three hundred day-old chicks (Ross 308) were distributed into five equal groups with two replicates. The control diets (T1) contained Corn-SBM, 0.9% Ca and 0.40% aP without enzyme, whereas T2, T3, T4 and T5 contained Corn-SBM, 0.60% Ca an...

Two experiments were conducted to examine the influence of addition of microbial phytase to diets differing in native phytase content, on the performance of sows and digestibility of nutrients. Barley and wheat grains relatively poor in native phytase used in Experiment 1 mixtures were replaced by triticale and rye (rich in this enzyme) in Experiment 2 diets. There were 3 groups in each experim...

Phytic acid, the main storage form of phosphorous in plants cannot be digested by monogastric animals and is excreted into environment. This compound also has antinutritional effect due to its negative charge which makes it able to chelate minerals and organic elements like calcium, iron, zinc and amino acids to provoke malnutrition. Alarming increase in eutrophication and cost of supplementati...

A total number of  5520 female and  480 male breeders (Arbor Acres plus) at 42wks of age  were used in a 10-week-trial to investigate the effect of an enzyme complex on  the quality  and quantity of egg production as well as hatchability of broiler breeders fed a corn-soybean meal diet. There were two dietary treatment groups: a control group fed on a corn-soybean based diet, and the multi-enzy...

OBJECTIVE Two experiments were conducted to determine the effects of adding exogenous phytase and xylanase, individually or in combination, as well as pelleting on nutrient digestibility, available energy content of wheat and the performance of growing pigs fed wheat-based diets. METHODS In Experiment 1, forty-eight barrows with an initial body weight of 35.9±0.6 kg were randomly assigned to ...

The phytase activity of 12 species of sourdough lactic acid bacteria was screened. It was intracellular only, largely distributed among the species and strains of Lactobacillus sanfranciscensis possessed the highest levels of activity. A monomeric ca. 50-kDa phytase was purified to homogeneity from L. sanfranciscensis CB1 by three chromatographic steps. L. sanfranciscensis CB1 exhibited the hig...