Journal of Animal Science and Technology
Korean Society of Animal Science and Technology

Determination of the maximum dietary effect of energy levels on growth performance and carcass characteristics of White Pekin duck

Jun Seon Hong, Jaehong Yoo, Hyunmin Cho, Wickramasuriya Samiru Sudharaka, Macelline Shemil Priyan, Jung Min Heo*
1Chungnam National University, Daejeon 34134, Korea.
*Corresponding Author: Jung Min Heo, Phone: 042-821-5777. E-mail:

© Copyright 2022 Korean Society of Animal Science and Technology. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Received: Apr 26, 2022; Revised: May 06, 2022; Accepted: May 06, 2022

Published Online: May 10, 2022


This experiment was conducted to determine the maximum dietary energy levels on growth performance and carcass characteristics of White Pekin duck. the Six dietary treatments were formulated based on their apparent metabolizable energy (AME) concentrations from 2,700 to 3,200 kcal/kg with a 100 kcal/kg gap to evaluate the accurate dietary AME requirement to address current knowledge and further issues for fulfilling the genetic potential of meat-type white Pekin ducklings. A total of 432 one-day-old male White Pekin ducklings were randomly allocated into one of six dietary treatments with six replicates (12 birds per pen). The diets were formulated as corn-soybean meal-based diets to meet or exceed the Nutrient Requirement of Poultry (1994) specification for meat-type ducks. Growth performance indices (i.e. average daily gain, average daily feed intake, feed conversion ratio) were measured weekly. Medium body weight ducklings from each pen were sacrificed to analyze the carcass traits and abdominal fat content on day 21. Obtained data were analyzed to estimate significant effect using the one-way ANOVA of IBM SPSS Statistics (Version, 25). If the p-value of the results were significant, differences in means among treatments were separated by Tukey’s post hoc test. Significant differences were then analyzed with a linear and quadratic broken model to estimate the accurate concentration of AME. Ducklings fed higher dietary AME diets increased (<italic>p</italic>&lt;0.05) BW, ADG. Ducklings fed higher AME than 2,900 kcal/kg diets increased abdominal fat accumulation and leg meat portion. The estimated requirement by linear plateau method showed from 3000.00 kcal/kg to 3173.03 kcal/kg whereas the requirement by quadratic plateau method indicated from 3100.00 kcal/kg to 3306.26 kcal/kg. Collectively, estimated dietary requirements exhibit diverse results based on the measured traits and analysis methods. All the estimated requirements in this experiment present higher than previous research, the maximum requirement for the next diet formulation should be selected by the purpose of the diet.

Keywords: abdominal fat; carcass trait; duck; energy level; growth performance