Jafari Nadooshan, H. (2011) Effect of Duration of Early Feed Restriction on Performance, Small Intestinal Morphology and Microflora of Broiler Chickens. Masters thesis, University of Zabol.
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Abstract
The current study was performed to investigate the effect of duration of early feed restriction on performance, blood parameters, Jejunal epithelial cell morphology and Ileal Microflora in broiler chicks. A total of 300 day-old Ross 308 broiler chicks were randomly distributed among 5 replicates (12 birds per each) of 5 experimental treatments. The experimental treatments consisted of a control group and 25% feed- restricted groups for 4, 6, 8 and 10 d started at 7 days of age. At d 49 of age, two randomly-selected birds per replicate were slaughtered to evaluate carcass characteristics, Ileal microbial populations and Jejunal epithelial cell morphology. Application of early feed restriction caused a significant (P < 0.05) decrease in feed intake; however, body weight gain and final body weight weren't different between feed-restricted groups and control one. Also, feed conversion ratio wasn’t affected by experimental treatments. Although carcass characteristics weren't influenced by treatments, feed restriction increased (P < 0.05) relative weight of small intestine compared with control group. Between lymphoid organs, only relative weight of bursa of Fabricious tended (P = 0.0943) to increase in 28 d- aged feed-restricted chicks in comparison with control chicks. On the other hand, antibody titer against Newcastle disease virus wasn’t different among experimental groups. At d 28 of age, E. coli count in Ileal contents was reduced (P < 0.01) as the result of feed restriction, however, Jejunal villi height wasn’t affected by experimental treatments. Application of early feed restriction caused a considerable (P < 0.01) decrease in serum triglycerides compared with that of control birds, however, serum cholesterol and high-density lipoproteins were not influenced by different treatments. The present findings suggest that considering 6-8 d feed restriction started at 7 d of age not only doesn’t adversely affect body weight gain and final performance, but also reduce pathogenic microbial count of ileum and optimize the early costs of broiler production.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Broiler chick, Early feed restriction, Jejunal morphology, Ileal Microflora, Blood parameters |
| Subjects: | S Agriculture > SF Animal culture |
| Depositing User: | admin admin1 admin2 |
| Date Deposited: | 18 Apr 2016 06:30 |
| Last Modified: | 18 Apr 2016 06:30 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/354 |
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