Project Number: 1265-12630-002-01
Project Type: Reimbursable

Start Date: Oct 01, 2005
End Date: Sep 30, 2009

Objective:
1. Establish a long-term international collaborative research and exchange to address concerns in animal systems and environmental stewardship between ARS-Beltsville and Vietnam, 2. Optimize dietary phytases enzymes production and utilization in animal nutrition, 3. Improve feed efficiency and animal performance in assimilating feed phosphorus, and system productivity, and 4. Characterize feed and excreta phosphorus and controlling mechanisms of P solubilization across enzymes sources and feeding regimes to develop sustainable waste management strategies.

Approach:
Series of experiments will be establishe to screen for high-phytase producing strains of Aspergillus spp, and high specific activity; establish animal studies to complement the phytase selection/screening work with the feeding of the finished product(s) to poultry at various levels of supplementation of enzymes. Measurements of feed efficiency, animal growth parameters etc... and P recovery, assimilation, and excretion in the manure will be determined.