Ahadi, Amir Hossien (2015) Impact of probiotic administration on growth performance, health and immune response of young dairy calves. Masters thesis, University of zabol.
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Abstract
This study was conducted to investigate the effects of different probiotics supplement on growth performance parameters, biochemical blood factors, immune response and health status of young dairy calves. A total of 40 neonatal calves, immediately after birth, were randomly assigned to one of 4 treatments, 10 replicates with 1 calf in each with a completely randomized design. Treatments included: control (C; without any probiotic supplement), CP (feed containing 2 g/d/calf commercial produced probiotic), DP (feed containing 2 g/d/calf domestically produced probiotic) and LP (feed containing 2 g/d/calf laboratory produced probiotic). Calves were weaned abruptly if they consumed 900 g dry matter of starter per day for three consecutive days. Compared with control, incorporation of the probiotics in the diet had signifi-cantly effect on final body weight, as the lowest and the highest average weight gain in the whole period of the study (day 1-60) were respectively seen in control and CP treatments (P<0.05). In addition, there was no significant effect on dry matter intake and feed converson ratio (P>0.05). Including probiotic into diets resulted to decrease weaning time compare to control group (P<0.05). Feeding probiotics to calves had not remarkable effects on biochemical blood parameters and blood metabolites (P>0.05). At the end of trial, the fecal population of lactic acid bacteria was different (P<0.05) between treatments; as the average fecal population of LAB was greater (P<0.05) with CP than other treatments. Based on the results of this experiment, control group had higher population of coliform and E. coli (P<0.05) and lower the Lactobacillus/coliforms ratio in the feces compare to the supplemented groups. The results of the present study indicate that adding probiotics supplements could be a potential treatment for increasing health status, and better performance.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Calf, Performance, Immunity, Health. |
| Subjects: | S Agriculture > SF Animal culture |
| Depositing User: | admin admin1 admin2 |
| Date Deposited: | 20 Jan 2018 09:55 |
| Last Modified: | 20 Jan 2018 09:55 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/1902 |
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