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The aim of this study was to investigate the effect of using different levels of sugarcane bagasse (SCB) and sugar beet pulp (SBP) with or without enzyme in diets of growing APRI line rabbits on the productive performance. One hundred and forty-four APRI rabbits were divided randomly into nine experimental groups of 16 rabbits each (8 males + 8 females) of 5 weeks of age with an average live body weight of (723 ± 2 gm.), were used in this study. The following 9 diets were obtained: control (0% Sugarcane Bagasse and Sugar Beet Pulp), SCB50 diet (Sugarcane Bagasse replace to 50% Berseem hay), SCB100 diet (Sugarcane Bagasse replace to 100% Berseem hay), SCB50E diet (Sugarcane Bagasse replace to 50% Berseem hay with Kemzyme), SCB100E diet (Sugarcane Bagasse replace to 100% Berseem hay with Kemzyme), SBP50 diet (Sugar Beet Pulp replace to 50% Berseem hay), SBP100 diet (Sugar Beet Pulp replace to 100% Berseem hay), SBP50E diet (Sugar Beet Pulp replace to 50% Berseem hay with Kemzyme) and SBP100E diet (Sugar Beet Pulp replace to 100% Berseem hay with Kemzyme). All diets were nearly isonitrogenous, iso-caloric and contained similar levels of crude fiber and micro elements. Results indicated that there were no significant differences in body weight between rabbits fed SBP diet and rabbits fed control diet, while those fed SCB diet had the lowest body weight. Using Kemzyme increased the body weight insignificantly, except in weeks 10, 11 and 12, which Kemzyme significantly (P<0.05) increased body weight. During the whole experimental period (5-13 weeks of age), rabbits fed SCB diets recorded significantly the lower daily weight gain, as compared with those fed SBP and control diet (23.56 vs. 25.43 and 25.41 g, P<0.001, respectively). Supplementing Kemzyme in diets had no significant differences on daily weight gain in all experimental periods. Feed intake in the whole period (5-13 weeks of age) significantly decreased by 3.5 and 5.1% for rabbits fed SBP and SCB diets, respectively, as compared with those fed control diet. Moreover, feed intake was decreased by 1.95% with adding Kemzyme during the whole experimental period. Feed conversion ratio was significantly improved with rabbits fed SBP diets, as compared with those fed control diet. Moreover, rabbits fed diets supplemented with Kemzyme improved the feed conversion ratio by 3.36%, as compared with those fed diets without Kemzyme. No significant differences could be observed in mortality percentage due to fiber source (AL, SCB and SBP) or enzyme supplementation in diets.

INFLUENCE OF USING SUGARCANE BAGASSE AND SUGAR BEET PULP WITH OR WITHOUT ENZYMES IN RABBIT DIETS: 1- ON GROWTH PERFORMANCE OF GROWING RABBITS