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Value of Dried Poultry Manure and Urea as Protein Supplements for Sheep Consuming Low Quality Tropical Hay

University of Zambia^,2, Lusaka, Zambia

Abstract

A study was conducted to evaluate the value of dried poultry manure and urea as protein supplements for high roughage tropical hay. Metabolism trials were conducted with sheep fed on hay alone or supplemented with soybean concentrate meal (SBM), dehydrated poultry manure (DPM) and urea-molasses mixture (UM). Protein supplements furnished 33.3% of the daily rations. Digestibility coefficients of dry matter and crude protein of hay was lower (P<.01) than that of the supplemented rations. The digestibility of dry matter for the SBM ration was higher than that of DPM (P<.05) and UM (P<.01) rations. Differences of crude protein digestibility among the supplemented rations were not significant. Nitrogen balance was positive for all supplemented rations and negative for hay. DPM and UM rations showed higher (P<.05) retained nitrogen, expressed as percent of both intake and digested, than SBM ration. DPM and UM were acceptable by sheep and do have value as protein supplements for poor hay. The values are sufficiently convincing to suggest that DPM and UM can be fed to ruminants in the tropics.

¹ Permanent address: Faculty of Agriculture, Cairo University, Giza, Egypt.

² School of Agricultural Sciences, P. O. Box 2379, Lusaka, Zambia.