Recycling Animal Wastes by Feeding to Enhance Environmental Quality

Animal wastes may cause water, soil, and air pollution, but if managed judiciously they are valuable resources. The main uses of animal wastes are as sources of plant nutrients (fertilizer) and animal nutrients (feedstuffs). The wastes are more valuable when used as feedstuffs than as fertilizer. Due to the unusually high fiber content and frequently high levels of nonprotein N, wastes are more valuable for feeding ruminants than nonruminants. Poultry wastes, especially poultry litter, have potential for increased use as animal feed. If processed properly, the wastes do not contain harmful patogens, and with appropriate management and withdrawal periods there is no serious residue problem. Poultry wastes have been used in practical fee.ding for different classes of beef cattle, and potential exists for increased utilization of these by-products. With the renewed emphasis on environmental quality, the livestock industry could capitalize on these valuable resources. Use of the wastes as animal feed could serve to enhance environmental quality and potentially increase profits for the industry.