Effects of urea treatment on Adar (Sorghum arundinaceum L.) proximate analysis and the performance of Desert sheep in Gadarif State, Sudan

Asma H. M. Hamed, Mohmed E. Elimam


Sheep production is very important in the Sudan due to high population, wide distribution and socio-economic impacts (Ministry of Animal Wealth and Fisheries, 2004). Sheep is the main non- oil export in the Sudan and there are increasing efforts to increase it in Gadarif State. Desert sheep is the main ecotype in the Sudan and is important in Gadarif State.  Nutrition is one of the main constraints for sheep production in the State, as the animals are mainly reared in traditional systems based on natural pastures which are deteriorating due to many factors (Mohmed, 2001).In addition, there are seasonal fluctuations in feeds quantity and quality associated with seasonal rainfall leading to serious shortages in the dry season with impacts on animals health and performance (Hamed, 2007).

Crop residues are abundant in Gadarif State, but generally have low nutritive value due to low CP and high CF and usually fed unimproved with low animals performance. It is important to exploit unconventional feeds to fill the nutritional gap and reduce feed costs. Overgrazing and poor pasture management led to the disappearance of favourable plants and increased unfavourable low quality plants such as Adar (Sorghum arundinaceum L.) in large areas. Adar is an annual grass in the family Poaceae and abundant in Rahad area and in the Gezira and occasionally found on the Nile banks (Braun et al., 1991). It is a wide spread weed in sorghum areas in Gadarif. Adar proximate analysis was 6.7 CP, 50.4 CF, 1.2 EE, 12.32 ash, 29.3 NFE and 8.32 ME (Ellis, 1981), 10.0 CP, 32.0 CF, 1.00 EE and 6.00 ash (Suliman, 1986) and 8.0 CP, 31.0 CF, 1.0 EE, 6.0 ash and 54.0 NFE (Elimam et al., 2013).


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