Resource Conservation and Utilization in Animal Waste Management. Volume I. Utilization of Animal Manures as Feedstuffs for Livestock and Poultry

摘要

Use of animal manures as feedstuffs has been suggested as a method to: (1) reduce the cost of producing animal products, and (2) reduce or alleviate potential air and water pollution problems associated with animal manures. This study assembled, critically reviewed and analyzed reported information pertaining to the nutrient characteristics of animal manures and their nutritive value when utilized as feedstuffs in feeding trials. The evaluation focused on dairy cattle, beef cattle, and caged laying hen manures, and broiler litter utilized as feedstuffs for cattle and poultry. Based on the results of feeding trials, the assessment of the nutritive value of animal manures indicated that generally less than 25% of the manures could be incorporated into rations without adversely affecting animal performance. The estimated economic value of the manures was highly variable.