Rezaei, Hosein (2021) Effect of different levels of energy and protein on performance of Khazak hen during phase I of laying period. Masters thesis, University of Zabol.
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Effect of different levels of energy and protein on performance of Khazak hen during phase I of laying period.pdf Download (240kB) | Preview |
Abstract
This study was conducted to investigate the effect of 2700 and 2900 kcal levels per kg of metabolizable energy and levels of 15% and 19% of crude dietary protein on the performance of khazak-laying hens in the first stage of laying. For this purpose, 160 Khazak-laying hens aged 25 weeks were selected and subjected to 4 treatments and 4 replications during 91 days in a factorial experiment based on a completely randomized design. Chickens were weighed at the beginning and end of the experiment. Percentage of egg production, egg mass, feed intake, feed conversion ratio and Haugh unit were significantly affected by different energy levels (P<0.05); with increasing the energy level of the feed to 2900 kcal / kg, the egg productionn percentage and egg mass increased. But Haugh unit, conversion ratis and feed consumption decreased. Also, different energy levels had no significant effect on average egg weight and egg quality. Different protein levels had a significant effect on Percentage of egg production, egg mass, egg units, egg quality parameters and average egg weight (P> 0.05); However, with increasing protein percentage, feed intake and feed conversion ratio showed a significant decrease. The interaction effect of different levels of metabolizable energy and dietary crude protein on egg productionn percentage, egg mass, egg Haugh unit, feed intake, conversion ratio and egg quality parameters was significant (P<0.05); At the level of 2900 metabolizable energy and 19% protein, the highest Percentage of egg production and egg mass was observed, but Haugh unit, egg quality parameters, feed conversion ratio and feed intake at the level of 2700 metabolizable energy and 15% protein increased.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Egg mass, Feed conversion ratio, Khazak hen, Haugh unit |
| Subjects: | S Agriculture > SF Animal culture |
| Depositing User: | Mrs najmeh khajeh |
| Date Deposited: | 20 Sep 2022 04:36 |
| Last Modified: | 20 Sep 2022 04:36 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/3006 |
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