Reducing Ammonia Emissions from Poultry Houses by Enhanced Manure and Diet Management

Grants and Contracts Details


A comprehensive, objective database of ammonia (NH3J emission factors for US poultry facilities is urgently needed to ensure reasonable estimates of their contributions to national NH3 emission inventory, as well as to assess means of emission reduction. Current estimates, derived from European data, vary markedly among themselves, and are not representative of modem US poultry systems. Our recent preliminary data demonstrates that currently-used emission factors for laying hens may be inflated. Given that the NH3 emission inventory will be re-assessed in 2002, timely action is required to obtain realistic values for US conditions. The goal of this multi-state and multidisciplinary project is to develop this urgently needed database, to educate concerned parties regarding NH3 emission rate from poultry houses, and to assess practical means to reduce it. We will achieve this goal by fulfilling the following objectives: 1) Determine NH3 emission factors for poultry confinement facilities for representative housing types, manure-handling practices, and seasonal and regional differences typically encountered by the U.S. industry; 2) Quantify the efficacy of selected methods for aerial NH3 emission abatement through dietary manipulation and manure management; 3) Provide research-based information that can be used for establishment of realistic guidelines on NH3 emissions from poultry operations; and 4) Educate industry stakeholders on means to minimize adverse impacts on environmental and natural resources while maintaining or improving their production efficiency. Outcomes of this project include establishment of an objective, foundational database of NH3 emission factors from commercial poultry operations typical of the U.S. poultry industry; identification of readily adoptable management and housing strategies for reducing NH3 emissions; and education/training of industry, scholars and stakeholders. Continuous measurements will be conducted over one full year in three regions: Midwest (IA), Southeast (KY) and Northeast (PA). The synergistic project team consists of agricultural engineers from Universities (ISU, UK, PSU) and USDA-ARS (MS), poultry nutritionists from academic institution (UNL) and the industry (Consultant), state poultry industry leaders (lA, KY, PA), and a US EPA research scientist. This team is ideally suited for conducting the project because of its members' relevant expertise and individual abilities in effectively conducting research, outreach and education programs. Ultimately, this project will impact the U.S. poultry industry by helping to sustain its competitiveness in the global economy.
Effective start/end date9/15/019/14/05


  • Agricultural Research Service: $874,000.00


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