Managing poultry manure nitrogen for optimum corn yields and minimum environmental loss

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2010-12-01
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Ruiz Diaz, Dorivar
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Sawyer, John
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Proceedings of the Integrated Crop Management Conference
Iowa State University Conferences and Symposia

The Iowa State University Integrated Crop Management Conference is Iowa's premier crop production education event. No other program in Iowa brings together the diverse range of topics, slate of expert presenters and results of the latest University research.

The ICM Conference offers workshops focusing on the latest in crop production technology. Experts from Iowa and surrounding states will provide research updates and results in soil fertility, soil and water management, crop production and pest management.

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Appropriate poultry manure management is essential to ensure maximum crop nitrogen (N) utilization and reduce risk of negative environmental impact. Poultry manure sources can provide a significant supply of nutrients for corn (Zea mays L.) production. While the main focus is usually on N and phosphorus (P), poultry manure is also an excellent source of other nutrients like potassium (K) as well as secondary and micronutrients where needed (Brock et al., 2006). Field application is typically based on P due to high concentration relative to N in the manure, and application may be limited to avoid over application of P. However, concerns exist about possible N application at rates higher than needed for corn with potential for contamination of water bodies due to leaching or runoff of excess N.

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