Environment2

Environment2 - 1 NUTRIENTS AND THE ENVIRONMENT Tayo...

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Unformatted text preview: 1 NUTRIENTS AND THE ENVIRONMENT Tayo Adedokun Lilly 2-119 sadedoku@purdue.edu Environmental Nutrition (Pork, October 1999) (Render, October 1999) 0% 2% 4% 6% 8% 10% 12% 14% 16% 18% Ammonia Fish Contamination Turbidity Noxious Plants Pesticides Flow Alterations Temperature Suspended Solids pH Habitat Metals Dissolved Oxygen Pathogens Nutrients Sediments Percent of Waters Listed 1998 EPA Section 303(d) List Top 15 Causes of Water Quality Impairment Severe ammonia injury to apple foliage Ozone injury to soybean foliage www.omafra.gov.on.ca cloudy Greenish with odor 2 Introduction With more animals being reared in a small area the volume of manure produced has also dramatically increased Increases in manure volume have caused concerns about the possible environmental impact of these farms # of farms # of animals per farm 1950 2000 High number of animal feeding operations (AFO)-280,000 Increased court cases (complaint by neighbor, etc) Manure - nutrient source for crops- alternative uses such as energy production If not properly managed: manure poses a threat to soil, water and air quality, and to human and animal health impending environmental regulations by EPA 1 /CERCLA 2 EPA, CERCLA, and EPCRA 3 report emission of H 2 S and HN 3 that exceed 100 lbs in any 24-hr period 1 Environmental protection agency 2 Comprehensive environmental response, compensation, and liability act 3 Emergency planning and community right-to-know act Relevance to Animal Science http://www.ars.usda.gov/docs.htm?docid=1083&page=8 Measures taken to reduce nutrient excretion Pre-excretion approach (diet modification) Nutrient input mass reduction (feeding strategy) Reduction in dietary CP Reduction in dietary inorganic P (phosphate) Ingredient selection/processing (e.g. DDGS) Nutrient form modification pH manipulation of diet Ammonia binding urease inhibitor Measures taken to reduce nutrient excretion Post-excretion approach Decreased pen surface pH acidification (Shi et al., 2001) Use of urease inhibitors and/or essential oils (Parker et al., 2004) Absorbing NH 3 with zeolites (Eng et al., 2004) (chemical amendment) 15 P 30.973 S w ine N utritionist Nutritional Importance of P 15 P 30.973 3 Nutrients In Feed Nutrients In Waste P and the Environment What are the risks? How should they be managed?...
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Environment2 - 1 NUTRIENTS AND THE ENVIRONMENT Tayo...

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