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Display category headings
Research Project:
Integrated Management Regimens That Minimize the Environmental Impact of Livestock Manure
Location:
Renewable Energy and Manure Management Research
Project Number: 6209-12310-002-00
Project Type:
Appropriated
Start Date: Oct 01, 2000
End Date: Apr 02, 2005
Objective:
Develop management practices to reduce losses of nitrogen and phosphorus to the environment including modification of animal diets and application strategies for effective use of manure on cropland and rangeland. Develop nutritional and management strategies and land application protocols that decrease atmospheric emissions of ammonia, odor, and particulates. Determine the survival and transport of pathogens from livestock manures and feeding facilities. Determine the influence of feeding distillers grains on animal performance, nutrient excretion, and pathogen excretion.
Approach:
An integrated approach to solve the objectives is used by considering all aspects of the manure cycle from the diets fed to the effects on soil, water and plants after land applications of manure. Atmospheric emissions and pathogen survivability will be determined in each phase of the manure cycle. Studies will be conducted at cooperating commercial feeding operations, in our research feedlot, in laboratory-scale systems, and during storage, treatment and application of manure to land. The effect of different diets and feeding regimes on ruminant nutrient excretion and emissions of ammonia, odors, and (or) particulates will be measured in digestion and feeding trials. The effects of nitrogen-based and phosphorus-based manure and compost applications rates, and the effects of long-term application of manure on agronomic and soil properties will be measured for both cropland and rangeland. The effects of manure treatment and handling on population of viable pathogens/toxins will be determined. Factors affecting ammonia emissions (and possibly other gases such as methane and nitrous oxide) from feedyards will be determined using lab-scale chambers and micrometeorological techniques. The effects of distillers grains on cattle performance and pathogen excretion will be determined in cattle growth trials and nutrient utilization will be determined using in situ and continuous culture techniques.
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