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Abstract
1- INTRODUCTION
Livestocks make important contributions to resource utilization and economical growth in developing countries where about 86 % of the world’s ruminants are found.
Dromedary camels (Camels dramedarius) are distributed in arid and semi-arid areas of north Africa, south- east Asia and India (Mason, 1979); in areas characterized by sparse and unpredictable food and water supplies. They are particularly well adapted to deserts and are better suited to these areas than are cattle, sheep and goats (Mcknight, 1969 and Wilson, 1984). Their food and water requirements are relatively lower than those of other species and they can extract more energy from the food they consume (Macfarlane et al., 1972; Farid et al.; 1979 and Yagil, 1981). Their low water requirements allow them to range great distance from water sources in search of food (Scmidt-Nielsen, 1964).
In spite of these important attributes of camels, they had low productivity per animals unit in developing countries, mainly attributed to many reasons especially low level of nutrition and fluctuation in feed availability. So, it is important to study and determine their nutritional needs to utilize their ability to produce meat, milk, fiber and hides and make camel development economically feasible.
The present study was carried out in order to investigate the response of camels performance, digestibility of nutrients, nutritive value, nitrogen utilization and some blood parameters to varying levels of dietary protein and energy under arid and semi-arid conditions.