Abstract
The aim of the current study was to investigate the effect of the energy density of diet on the growth performance of Thai indigenous crossbred (50%) chickens known as Korat chicken (KRC). A total of 1440 mixed-sex KRC (720 birds in each phase) were randomly allocated to 4 dietary treatments containing 2750, 2900, 3050, or 3200 kcal ME/kg diet with 6 replicates of each treatment in a completely randomized design. The experimental diets were tested from hatch to 21 days and from 22 to 42 days of age. In both age groups, body weight gain was not affected (P > 0.05) by the ME density of the diets. Feed intake however decreased with increasing (metabolizable energy) ME (P < 0.05), thereby significantly improving the feed conversion ratio (FCR). Broken-line analysis was performed to estimate the ME content of feed to obtain minimum FCR and maximum protein efficiency ratio (PER) values. Minimum FCR and maximum PER values were found when the diet contained 3000 kcal ME/kg from hatch to 21 days of age and 3175 kcal ME/kg from 22 to 42 days of age, respectively, using diets containing 7.5 and 6.6 g of protein/100 kcal ME, respectively. In conclusion, we established that the ME requirements of KRC from hatch to 21 days and 22 to 42 days of age were 3000 and 3175 kcal/kg, respectively.
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Acknowledgements
We wish to express thanks to Suranaree University of Technology (SUT) for facilities research and a scholarship from the Ministry of Science and Technology.
Funding
This research was financially supported by the National Research Council of Thailand (NRCT) No. SUT3-303-58-36-06 and the Thailand Research Fund (TRF).
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All procedures of our experiment were conducted according to the principles and guidelines approved by the Animal Care and Use Committee of Suranaree University of Technology.
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The authors declare that they have no conflict of interest.
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Maliwan, P., Khempaka, S., Molee, W. et al. Effect of energy density of diet on growth performance of Thai indigenous (50% crossbred) Korat chickens from hatch to 42 days of age. Trop Anim Health Prod 50, 1835–1841 (2018). https://doi.org/10.1007/s11250-018-1628-1
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DOI: https://doi.org/10.1007/s11250-018-1628-1