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. 2022 May;64(3):471-480.
doi: 10.5187/jast.2022.e35. Epub 2022 May 31.

Dietary effect of energy levels on growth performance and carcass characteristics of White Pekin duck over 21 days

Jun Seon Hong  1 , Jaehong Yoo  1 , Hyun Min Cho  1 , Samiru Sudharaka Wickramasuriya  1 , Shemil Priyan Macelline  1 , Jung Min Heo  1
Affiliations

Dietary effect of energy levels on growth performance and carcass characteristics of White Pekin duck over 21 days

Jun Seon Hong et al. J Anim Sci Technol. 2022 May.

Abstract

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 specification for meat-type ducks. Growth performance indices (i.e. average daily gain [ADG], average daily feed intake, feed conversion ratio) were measured weekly. Medium body weight (BW) 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 (p < 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 3,000.00 kcal/kg to 3,173.03 kcal/kg whereas the requirement by quadratic plateau method indicated from 3,100.00 kcal/kg to 3,306.26 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 traits; Duck; Energy level; Growth performance.

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Conflict of interest statement

No potential conflicts of interest relevant to this article was reported.

Figures

Fig. 1.
Fig. 1.. Linear and quadratic plateau analysis of results of body weight on day 21.
AME, apparent metabolizable energy.
Fig. 2.
Fig. 2.. Linear and quadratic plateau analysis of results of average daily gain from day 14 to day 21.
AME, apparent metabolizable energy.
Fig. 3.
Fig. 3.. Linear and quadratic plateau analysis of results of average daily gain from day 1 to day 21.
AME, apparent metabolizable energy.
Fig. 4.
Fig. 4.. Linear and quadratic plateau analysis of results of average daily feed intake from day 14 to day 21.
AME, apparent metabolizable energy.
Fig. 5.
Fig. 5.. Linear and quadratic plateau analysis of results of feed conversion ratio from day 1 to day 7.
AME, apparent metabolizable energy.
Fig. 6.
Fig. 6.. Linear and quadratic plateau analysis of results of feed conversion ratio from day 1 to day 21.
AME, apparent metabolizable energy.
See this image and copyright information in PMC

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