Performance of growing indigenous goats fed diets based on urban market crop wastes
Tropical Animal Health and Production
Department of Animal Science, Makerere University, P.O. Box 7062, Kampala, Uganda; Department of Crop Science, Makerere University, P.O. Box 7062, Kampala, Uganda; Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, P.O. Box 7024, 750 07 Uppsala, Sweden
The effect of feeding diets including market crop wastes (sweet potato vines (Ipomoea batatas) and scarlet eggplant (Solanum aethiopicum)) on growth and digestibility was studied using 32 indigenous intact growing male goats. Adding elephant grass (Pennisetum purpureum), maize bran and Leucaena leucocephala leaves, four isocaloric and isonitrogenous diets (Sweet potato vines, Solanum, Mixed and Control) were formulated. After the growth trial, 12 goats were randomly selected for a digestibility trial with the same diets, and 8 goats for a feed preference test comparing the market wastes and elephant grass. Crude protein (CP) intake was highest (P∈<∈0.05) for the Control (48 g/day) and lowest for the Sweet potato vines diet (23 g/day). Average daily gain was between 11.0 and 14.2 g/day, and similar between diets. The DM and CP digestibilities of the diets were 0.56 and 0.56 (Control), 0.62 and 0.56 (Mixed), 0.59 and 0.49 (Sweet potato vines), and 0.54 and 0.45 (Solanum), respectively. Faecal and urinary N excretions were highest in goats fed the Sweet potato vines and Solanum diets. Eggplant wastes were the least (P∈<∈0.05) preferred. On average the goats spent 5% of their 8-hour time eating eggplant wastes, 34% on sweet potato vines and 36% on elephant grass. Growth performance and N retention were low due to the low intake of feed, especially eggplant wastes. © 2008 Springer Science+Business Media B.V.
nitrogen; vegetable protein; animal; animal food; article; aubergine; chemistry; digestion; feces; goat; growth, development and aging; maize; male; metabolism; nutritional value; pearl millet; physiology; plant leaf; protein intake; randomization; sweet potato; Uganda; urine; weight gain; Animal Feed; Animal Nutritional Physiological Phenomena; Animals; Dietary Proteins; Digestion; Feces; Goats; Ipomoea batatas; Male; Nitrogen; Nutritive Value; Pennisetum; Plant Leaves; Plant Proteins; Random Allocation; Solanum melongena; Uganda; Weight Gain; Zea mays; Capra hircus; Ipomoea batatas; Leucaena leucocephala; Pennisetum glaucum; Pennisetum purpureum; Solanum; Solanum aethiopicum; Solanum melongena; Zea mays