عنوان مقاله [English]
In the present study, the effects of different levels of beet molasses on some growth and survival indices, intestinal bacterial flora and length of villi in common carp were studied. In this experiment, 360 common carp species were used with a mean weight of 28 ± 2.5 gr The fish in 12 reservoirs were randomly distributed to 30 units per reservoir. After one week of adaptation, it was fed for a period of 8 weeks. The experiment was carried out in the form of 4 treatments and each treatment with 3 replications including: Molasses (treatment 1), diet containing 0.5% molasses (treatment 2), diet containing 1% molasses (treatment 3) and diet containing 2% molasses (treatment 4 ) And fish were fed daily with 3% body weight and twice daily with experimental diets. The food of the control group, the commercial food of the common carp of the company was enriched with no molasses. Growth and nutrition indices (body weight gain, body weight gain, specific growth rate, condition factor, nutritional conversion factor), total bacterial count of the intestine as well as the length of the intestinal paresis were performed at the end of the experiment. Data analysis at the end of the study showed that growth and nutrition indices (body weight gain, specific growth rate, condition factor, feed conversion ratio) were significantly different between treatments (p < 0.05). An examination of the total number of aerobic bacteria in the intestine showed that there was a significant difference between the treatments in the total number of aerobic bacteria (p < 0.05). Also, the study of peptic ulcer length in different treatments indicated that the length of the peptic ulcer was significantly different between treatments (p < 0.05).