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Research Project:
Effective Management and Safe Use of Waste from Poultry and Swine Production
Location:
Waste Management and Forage Research
Project Number: 6406-12630-003-00
Project Type:
Appropriated
Start Date: Mar 28, 2003
End Date: Aug 31, 2005
Objective:
This program researches forages for extraction of nutrients from soil exposed to long-term applications of animal waste and for management of current field applications. Research determines fertilizer value of poultry litter on cotton to include different cotton management systems, and soil types. Basic studies on manure mineralization and nutrient transport are initiated in those soils common to the South to determine pollution potential and nutrient availability with different management systems. In the poultry house, gas losses of nutrients which impact bird growth and fertilizer value are modified through management and assessed for newer animal production systems. The potential for water pollution is measured for grazing management, forage management, soil types and poultry litter fertilization in watersheds.
Approach:
Measure the impacts of manure nutrient quality, quantity of application, and timing of application on forage productivity, on rates of nutrient removal in harvested hay, on accumulation of excess nutrients in soil, and on nutrient mobility in the soil. Determine the effects of poultry litter fertilization over time on soil and plant and the best management for cotton grown with no-till and other common management systems for different soils. Determine soil quality characteristics, nutrient speciation, mineralization rates, and soil nutrient balances and imbalances with long term fertilization with poultry litter or swine effluent. In commercial poultry houses, measure changes in nutrient concentrations, speciation of nutrients, gas off products, and bird performance as affected by house and bird management, by seasonal environment, and by bird rations to include phytase and low P feeds. Determine the water quality of runoff and subsurface water with litter applications to watersheds and pasture botanical changes with and without animal grazing on three soil types.
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