Tibia mineralization of chickens determined to meat production using a microbial phytase

Mária Angelovičová,Martin Mellen,Jozef Čapla,Peter Zajác,Marek Angelovič

doi:10.5219/805

Mária Angelovičová, Martin Mellen + Show 3 more

Open Access

https://doi.org/10.5219/805

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Abstract

The target of the research was 6-phytase of microbial origin. It was used in feed mixtures for chickens determined to meat production. Its effect has been studied in relation to the tibia mineralization by calcium, phosphorus and magnesium. 6-phytase is a product of Aspergillus oryzae. That was obtained by means of biotechnological processes of production of commercially available enzymes. It was incorporated in the feed mixtures 0.1%. In a 38-day feeding trial, 300 one-day-old, as hatched, Cobb 500 chickens determined to meat production (100 birds per group) were fed on one concentrations of dietary non-phytate phosphorus (2.32, 2.31 g.kg-1, respectively and supplemental microbial phytase (0 and 500 FTU.kg-1 feed mixtures). Control group was used to compare the results and control feed mixtures contained 4.5 g.kg-1 without microbial phytase. At days 40 it was selected 6 birds in every group, which were slaughter in accordance with the principles of welfare. Left tibias of every bird were used to determination of calcium, phosphorus and magnesium contents. According to in vivo, it was found that the addition of microbial phytase to reduced dietary non-phytate phosphorus increased concentrations of calcium (Ca), phosphorus (P) and magnesium (Mg) in tibia. The differences among groups were statistically significant (p <0.05). It was concluded that reducing of dietary non-phytate phosphorus on the 2.32, 2.31 g.kg-1, respectively, by monocalcium phosphate and microbial phytase supplementation in feed mixtures facilitated tibia mineralization at chicken determined to meat production.

Highlights

The availability of phosphorus in feedstuffs of plant origin is generally very low, ranging from 30 to 40% (Nelson et al, 1968a)
The assessment of basic statistical characteristics shows that the lowest values of fluctuation of calcium content in tibia were at chickens fed by feed mixtures with the reduced nonphytate phosphorus content and with the share of 6-phytase
The differences of calcium content in tibia were statistically significant (p

Summary

Introduction

The availability of phosphorus in feedstuffs of plant origin is generally very low, ranging from 30 to 40% (Nelson et al, 1968a). The most commonly used method is supplementing high dosage of inorganic phosphorus in feed, which leads to the excretion of large amounts of phosphorus in animal manure. Among the strategies designed to reduce excessive drainage of phosphorus and calcium into the environment from the poultry industry, the two most important are (1) determining the exact phosphorus and calcium requirements for present modern chickens determined to meat production and formulating to meet those requirements exactly and (2) using additives such as microbial phytase to increase phytate phosphorus utilization and decrease excretion of these nutrients into environment (Angel et al, 2005). Supplemental phytases improve dietary phytate-phosphorus utilization by foodproducing animals, and reduce environmental pollution of phosphorus from animal waste in areas of intensive animal production (Kliment et al, 2010)

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