1a.Objectives (from AD-416)
Determine the activity and/or concentration of hormones and ag chemicals in animal waste under various manure handling conditions in order to develop practices that minimize potential environmental impact.
1b.Approach (from AD-416)
This will be a joint effort between VPI and SU, who will be responsible for setting up and conducting the experimental trails, and ARS who will develop methodology and perform analyses of samples. Both partners will collaborate in the design of the experiments and interpretation of the results.
A microbial-based method for the detection of bacitracin in water extracts has been completed. Bacitracin is an antibiotic commonly used as a feed additive in the poultry industry. Although extracts of excreta from bacitracin-treated birds contained antibiotic activity in >90% of the pens assayed (and none of the control pens) water-extractable residues of the bedding were typically non detectable and were similar for both control and antibiotic-fed animals. To date, results of this study suggest minimal environmental impacts emanating from field-application of poultry litter from bacitracin treated birds. Standards and samples were sent to another laboratory for independent analysis, but the collaborators have not completed the analyses to date. We plan to compare results of the relatively inexpensive bioassay with results obtained from the more expensive chemical assay.
ADODR monitoring activities include regular conference calls, and emails between parties are utilized for updates on the status of the cooperative agreement activities.