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Advances in Animal and Veterinary Sciences

Research Article
Adv. Anim. Vet. Sci. 7(6): 452-460
Http://dx.doi.org/10.17582/journal.aavs/2019/7.6.452.460
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W. Boontiam1*, P. Kumari2

1Faculty of Agriculture, Department of Animal Science, KhonKaen University, KhonKaen 40002, Thailand; 2College of Agricultural and Life Sciences, Seoul National University, Seoul, Republic of Korea.

Abstract | The study was investigated the effects of mangosteen (Garcinia mangostana) pericarp extract (MCE) dissolved in drinking wateron the heat stress (hot season) of laying quails. A total of 700 laying quails with average initial egg production of 82.38% ± 0.98 were randomly assigned to one of four treatment groups. Each group had seven replications of 25 quails for each. The treatment groups included a control group that did not receive mangosteen pericarp crude extract (MCE) supplementation and three groups that received dilution ratios of MCE to water of 1:5 (MCE5), 1:10 (MCE10) and 1:15 (MCE15), respectively. The quails were consumed the different MCE dilutions during summer for 16 weeks. The temperature was ranged from 35 °C to 37 °C. The experimental quails were exposed to chronic heat stress for four hours daily under an open-housed system. The result showed that the feed conversion ratio, yolk color, total cholesterol, and aspartate aminotransferase were unaffected by the MCE treatments (P > 0.05).However, feed consumption, egg production, egg weight, and egg mass were significantly increased by the addition of MCE (P ≤ 0.05). Linear improvements in Haugh unit (P= 0.014), specific gravity (P= 0.089) and eggshell components (P= 0.033) were detected with increasing dilutions of MCE. Heterophil-to-lymphocyte ratios (H/L ratio) also tended to be lower in the quails that received MCE treatment (P= 0.071). Low-density lipoproteins and glucose concentrations decreased, whereas an increase in high-density lipoprotein was detected with the addition of MCE (P ≤ 0.05) increased. We furthermore the fecal microbial populations such as Salmonella enteritidis, Lactobacillus spp. and Escherichia coli were influenced by MCE treatment in the laying quails (P≤0.05). In conclusion, we found that the addition of MCE to drinking water could be an alternative approach to reduce the heat stress effect in laying quails.

Keywords | Gut microbiota, Heat stress, Laying quail, Mangosteen pericarp