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This study was conducted to evaluate the effect of oral administration of L-carnitine (LC) on the anatomical characteristics of various segments of the digestive tract in growing lambs. This study was carried out at Animal Experimental Station, belonging to the Animal Production Department, Faculty of Agriculture, Mansoura University, during the period from September to December 2014. A total of 9 Rahmani lambs (33.9±0.69 kg LBW and about 10 mo old) were assigned randomly into 3 groups according body weight. The three groups were assigned at random to receive 3 treatments. Animals in the 1 group (G1) were fed the control diet (14.5% CP and 10% CF). Lambs in the 2 and 3 groups were fed the same diet, but orally treated with LC at levels of 350 (G2) and 700 (G2) mg/h/d for 63 days as treatment period, respectively. Lambs were fed berseem hay (14.6% CP and 38% CF) and concentrate feed mixture (14.4% CP and 4.5% CF). Amount of feeds were adjusted every 2 weeks to reach 1.5 kg hay and 1.2 kg CFM at the end of the experimental period. At the end of the experimental period (63 d), lambs in each group were slaughtered after 12 h of fasting. The carcass was opened and the digestive tract was immediately removed. The digestive tract was tied starting from the esophagus up to the anus to cut off each segment. Full, empty and contents weights or volumes as well as intestinal measurements of each segment were recorded. Results showed that full weight of reticulo-rumen (RR), omasum (OM), abomasums (AB), cecum (CM), colon-rectum (CR), total stomach compartments (TSC) and total digestive tract (TDT) tended to be reduced as affected by LC. Full weight of small intestine (SI) was higher (P<0.05) in G1 than in G3, but those in G2 did not differ than in G1 or G3. Full weight of cecum relative to TDT was lower (P<0.05) in G2 than in G3, and both did not differ from G1. Empty weight of rumen was lower (P<0.05) in G3 than in G1 and G2. Empty weight relative to TDT for all segments was not affected by LC.

EFFECT OF L-CARNITINE ADMINISTRATION ON ANATOMICAL STRUCTURE OF THE DIGESTIVE TRACT SEGMENTS IN LAMBS