EFFECT OF DIFFERENT LEVELS OF DIATERY PROTEIN ON GROWTH PERFORMANCE, FEED EFFICIENCY, NUTRIENT DIGESTIBILITES, RUMEN LIQUOR AND SOME BLOOD PARAMETERS OF WEANED RAHMANI LAMBS. | ||||
| Journal of Animal and Poultry Production | ||||
| Article 14, Volume 29, Issue 7, July 2004, Page 3877-3889 PDF (3.9 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2004.239303 | ||||
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| Authors | ||||
| S. Fahmy,; A. A. Abou'l Ella | ||||
| Dept. of Animal Prod., Fac. Of Agric. AI-Azhar University, Assuit Branch Egypt | ||||
| Abstract | ||||
| Eighteen weaned Rahmani male lambs with live body weight ( LSW) ranging from 18 to 20 kg about 4 months of age were divided according to their body weight into three groups ( 6 lambs each) to study the effect of different levels of dietary protein on their growth performance, digestibility, rumen liquor and some blood parameters and the income over feed cost. Each group was fed ration (concentrate feed mix CFM) containing different levels of protein, but isocaloric for four month. Lambs in group 1 (G1), group 2 (G2) and group 3 (G3) fed CFM containing 14, 16, and 18 % crude protein as dry matter, respectively. The results of the animal performance showed that the ADG significantly increased (P<0.05) when the level of protein increased. Lambs in G3 had higher (P< 0.05) ADG than those in G1 and G2. Daily feed intakes expressed as OM was slightly higher for G1 flowed by G2 and G3. The results of feed efficiency show that lambs fed high level dietary protein had the highest values of body gain related to the unit of DMI and TON The results of nutrients digestibility pointed that increasing dietary protein improved OM, OM, CP, EE and NFE digestibilites. Crude protein digestibifity increased as level of protein increased. The same trend has been recorded with feeding value expressed as TON and DCP. The high level of protein in the ration in G3 were accompanied higher of total protein (TP), albumin (AL), globulin (GL) and glutamate-puruvate transaminase GPT. Lambs in G2 had slight higher glutamate-oxaloacetate transaminase GOT than those in G1 and G3. The differences among treated protein were significant (P<0.05) in TP and GL on weaning lambs , while the differences among treated protein were non significant in AL, GOT and GPT on weaning lambs Ammonia - N concentration of rumen liquor tended to increase gradually as a result of increasing protein level. The highest value was recorded for G3 followed by G2 while the lowest value for G1. The highest income over feed cost were obtained from lambs of G3,while the lowest was with lambs of G 1. In view of the obtained results, it could be concluded that increasing protein level in the ration of weaned lambs improved the animal performance, digestibility, feeding values and reduce the cost of the product ( meat production) by increasing the feed efficiency. Furthermore, the level of 18% CP in the ration of weaned lambs is sufficient for good growth performance during this stage. | ||||
| Keywords | ||||
| Dietary protein; performance; nutrient utilization; blood parameters; sheep; digestibility; rumen parameters | ||||
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