Animal Bioscience

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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An assessment of responses to egg production and liver health of Japanese quails subjected to different levels of metabolizable energy

  • Received : 2022.03.09
  • Accepted : 2022.07.09
  • Published : 2023.01.01
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Abstract

Objective: Current quail production is configured as an economic activity in scale. Advancements in quail nutrition have been limited to areas such as breeding and, automation of facilities and ambience. The objective of this study was to evaluate the performance responses, liver and oviduct morphometry, and liver histology of Japanese laying quails subjected to different levels of nitrogen-corrected apparent metabolizable energy (MEn). Methods: A completely random design was used that consisted of nine levels of MEn, six replicates, and five hens per cage with a total of 270 quails. The experimental period lasted for 10 weeks. The variables of performance were subjected to analysis of variance and then regression analysis using the broken-line model. The morphometric and histological variables were subjected to multivariate exploratory techniques. Results: The MEn levels influenced the responses to zootechnical performance. The broken-line model estimated the maximum responses for feed intake, egg production, egg weight, and egg mass as 3,040, 2,820, 1,802, and 2,960 kcal of MEn per kg of diet, respectively. Multivariate analysis revealed that the occurrence of hepatic steatosis and increased levels of Kupffer cells were not related to MEn levels. Conclusion: The level of 2,960 kcal/kg of MEn meets performance variable requirements without compromising hepatic physiology.

Keywords

Acknowledgement

The authors would like to thank the PEC-PG program for granting the doctoral scholarship and Paulo Rene Silva-Junior for the valuable discussions on this manuscript.

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