1a. Objectives (from AD-416)
The objectives of this cooperative research project are to: 1) determine spatial distribution, concentration, and types of mineral nutrients, gases, and microbes in poultry litter in a broiler house as affected by environment, house management, and successive broods of broilers; 2) determine base line and changes in pasture land as poultry litter is applied as a fertilizer; and 3) determine influence of environmental and agronomic practices on the fate and transport of nutrients and microbes from litter applied to pasture lands that have not previously had litter applied.
1b. Approach (from AD-416)
Work will be done on cooperator's farm in Oktibbeha County, Mississippi. ARS will work with cooperator in establishment and maintenance of multi-year on farm experiments designed to identify, quantify, and determine the fate and transport of nutrients and microbes and to generate data and new information to improve efficient farm practices. ARS researchers will work with cooperator to collect litter, soil, runoff, and crop plant samples from the cooperator's farm. Samples will be transported to ARS Genetics and Precision Agriculture laboratories at Mississippi State, Mississippi, for nutrient and microbial analysis. Air samples will be collected systematically from the houses as they are stocked with birds and as subsequent flocks of birds are stocked and grown in the houses.
3. Progress Report
Year two of a long-term study of fate and transport of nutrients, bacteria, fungi, and air emissions was completed in a 2009 startup broiler operation. Measurements continued in production houses and a field site where litter was applied. In-house measurements were made for six successive flocks. Forage harvests continued from litter-fertilized field plots. The ADODR monitored this project by discussions with the principal scientist involved in this research. Principal scientist had frequent contact with the cooperator.