Sanaei Rad, Mahdi (2014) Estimation of lysine requirements in growing Japanese quail from 21 to 35 days of age. Masters thesis, University of Zabol.
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Abstract
A dose-response experiment was conducted to estimate the lysine (Lys) requirement of growing Japanese quails from 21 to 35 d of age using broken-line regression. A basal diet was formulated to be adequate in all amino acid concentrations except the Lys. Incremental levels of supplemental L-Lys. HCL were added to the basal diet at the expense of cornstarch sodium bicarbonate, and Nacl to create 6 levels of dietary Lys ranged from 0.7 to 1.45% of diet. Body weight gain (BWG) and feed conversion ratio (FCR) responded quadratic ally to incremental levels of Lys (p<0.05). Using linear broken-line (LBL) regression the estimated Lys requirements for BWG during the fourth and fifth weeks of age were 1.11 and 1.09% of diet, respectively. The corresponding values for FCR were estimated at 1.09 and 1.12% of diet respectively. Fitting models with Quadratic Broken-line (QBL) regression revealed that the estimated Lys requirements for BWG during the fourth and fifth weeks of age were 1.19 and 1.20% at diet respectively. The corresponding values for FCR were estimated of1.20 and 1.22% of diet, respectively. The study showed that the Lys requirements would not change in the fourth and fifth weeks of age and 1.20% of dietary Lys may be needed to optimize performance at late stage of production on average.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | Japanese quail, Lysine requirement, Body weight gain, feed conversion ratio a |
| Subjects: | S Agriculture > SF Animal culture |
| Depositing User: | admin admin1 admin2 |
| Date Deposited: | 19 Jun 2016 04:47 |
| Last Modified: | 19 Jun 2016 04:47 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/789 |
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