Journal Article

Estimation of Optimal Lysine in Quail Chicks During the Second and Third Weeks of Age

Kasmani, Farzad Bagherzadeh, Mehri, Mehran, Jalilvand, Ghasem, Ghazaghi, Mahmoud, Mahdavi, Amir-Hossein

2013

Overview

An experiment was conducted to assess the optimal levels of dietary lysine (Lys) in Japanese quail from 7 to 21 days of age. A dose-response diet was formulated to be adequate in all amino acid concentrations with the exception of Lys. Different levels of supplemental L-Lysine.HCl were added to the dose-response diet at the expense of corn starch, sodium bicarbonate, and NaCl to create 6 levels of Lys ranged from 0.91% to 1.51% in diet. Optimal Lys for feed conversion ratio, breast meat yield, and thigh meat yield were estimated at 1.15%, 1.21%, and 1.16% of diet, respectively, based on linear broken-line regression. With quadratic broken-line regression, the Lys requirements for body weight gain, feed conversion ratio, thigh meat yield, and breast meat yield were estimated at 1.27%, 1.21%, 1.32%, and 1.34% of diet, respectively. Overall, Lys requirements of starting Japanese quail may be at least 1.34% of diet for optimizing carcass attributes fed low-CP dose-response diet.

• Publisher: Taylor & Francis,Taylor & Francis Ltd,PAGEPress Publications,Taylor & Francis Group
• Subject: Amino acids / body weight changes / Body weight gain / breast meat / Broken-line model / corn starch / Coturnix japonica / Diet / dose response / feed conversion / Japanese quail / Japanese quail, Lysine, Low-CP diet, Broken-line model / Low-CP diet / Lysine / Meat / Nutrient deficiency / Physical growth / Sodium bicarbonate / Sodium chloride / Starch