Managing Phosphorus Enrichment in Watersheds with high levels of Livestock and Poultry Production

摘要

While the nutrients in manure are a great source of soil fertility that benefits crop production, in watersheds with dense concentrations of livestock and poultry production, nutrient enrichment in reservoirs and estuaries that must be addressed. Thispaper will summarize some of the strategies used to address phosphorus enrichment from animal production and identify research needs and information gaps that hinder successful solutions. Various projects and studies conducted in the Lake Allatoona andLake Lanier Basins that serve as the source of all of Atlanta's drinking water will be used to summarize the extent of the issue. Some of these include nutrient management implementation efforts, modeling and establishing TMDL's in the basins, attempts at developing and implementing nutrient trading programs and opportunities to add value and export manure nutrients from the watershed. Many of the findings will come from previously published research as will as extension and engagement programs that investigated farmer led solutions.