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Research Needs on the Utilization Aspects of the Feeding of Animal Wastes¹

US Department of Agriculture², Beltsville, MD 20705

Abstract

Animal waste unequivocally has nutritive value. It is a valuable resource. But nutrient content is variable as a consequence of diet quality of producing animals and source, storage, handling and processing of wastes for feed. Nutrient utilization varies with the species and productive status of the recipient animal. Quantitative data are needed on the relationship of these factors to, and their effects on, the final product that is fed. There is considerably more information on the feeding value of animal waste than there was 15 years ago, but gaps in knowledge still exist. More emphasis is needed on the development of reliable mechanization for specific application to feed recycling systems. This is a critical problem, and specific processing goals and an objective effort to conserve nutrients need to guide future research. Research should provide the basis for more effective use of animal waste products for feed and, thus, for more economic livestock production. This problem area would appear to be well suited to a team effort. At the very least, the team should include animal scientists, engineers and microbiologists. A multidisciplinary approach should be the most efficient way to make systematic progress toward solutions to peripheral problems associated with conservation of nutrients and logistics of handling, storage and feeding systems. Without feasible, reliable concepts and mechanization of systems for harvesting, preserving and using animal waste, the feeding of animal wastes will be encumbered.

¹ Paper presented at the Symposium on "The Regulatory Situation Concerning the Animal Sciences," held during the 71st Annu. Meet, of the ASAS, Univ. of Arizona, Tucson, July 1979.

² Animal Science Institute, AR, SEA.