Optimization of Phytase Concentration from Aspergillus ficuum for Phytate-bound Phosphorus Release in Cereal Meals

Chivandi, E and Zakeo, G and Tada, O (2010) Optimization of Phytase Concentration from Aspergillus ficuum for Phytate-bound Phosphorus Release in Cereal Meals. pp. 785-788. ISSN ISSN Print: 1560–8530; ISSN Online: 1814–9596

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Abstract

In order to determine the optimum phytase dose needed to release phytate-phosphorus in Zea mays, Triticum aestivum and Sorghum bicolor meals, six phytase concentrations (0, 100, 200, 300, 500 & 1 000 μg/kg) prepared from a commercial phytase (Natuphos®) derived from Aspergillus ficuum, were investigated. A dose-dependent increase in phytate-phosphorus release with an increase in phytase concentration was noted. The optimum phytase dose for phytate-phosphorus release from Z. mays, T. aestivum and S. bicolor meals was 700, 567 and 667 μg/kg, respectively. Non-phytate phosphorus concentration at the optima phytase doses were 1.4868, 5.742 and 2.136 g/kg for Z. mays, T. aestivum and S. bicolor meals,respectively; translating into incremental phosphorus release of 166.8, 31.0 and 161.4%, respectively. The optimum dose of A.ficuum derived phytase required for release of phytate-phosphorus is dependent on cereal type. Key Words: Cereals; Exogenous phytase; Phytate-bound phosphorus; Nutrient-chelating

Item Type: Article
Subjects: S Agriculture > S Agriculture (General)
S Agriculture > SF Animal culture
Depositing User: Dr O Tada
Date Deposited: 19 Jun 2015 08:15
Last Modified: 19 Jun 2015 08:15
URI: http://researchdatabase.ac.zw/id/eprint/308

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