Department of Biochemistry, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44511, Egypt.
Department of Poultry, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt.
Poult Sci. 2019 Jan 1;98(1):319-329. doi: 10.3382/ps/pey348.
To provide a safe growth promoter, the present study has investigated the effects of different levels of cold-pressed clove oil (CCPO) on growth performance, carcass traits, blood biochemistry, and intestinal microbial population of growing Japanese quails. A total of 300 quails (1-wk old) were randomly divided into 3 treatment groups: control basal diet, basal diet +0.75 mL oil/kg diet, and basal diet +1.5 mL oil/kg diet. Quails fed with 1.5 mL clove oil/kg diet showed a 3.43% improvement in live body weight vs. control group. Similar trend was observed for daily body weight gain. Feed intake gradually increased (P < 0.01) with an increase in clove oil level. The best feed conversion rate was reported for the control group, followed by the group treated with 1.5 mL CCPO/kg diet during the whole period (1 to 6 wk of age). Total globulin differed significantly in 1.5 mL CCPO/kg diet group. Antioxidant enzyme activities, lipid profile, and reduced glutathione concentrations significantly improved in a dose-dependent manner. Blood urea nitrogen, creatinine, malondialdehyde, 8-hydroxy-2΄-deoxyguanosine, and protein carbonyl levels significantly decreased in quails supplemented with 1.5 mL CCPO/kg diet vs. control group. Serum levels of insulin-like growth factor-1, insulin, growth hormone, and thyroxine significantly increased in quails supplemented with 1.5 mL CCPO/kg diet vs. control group. The intestinal bacterial population, coliforms, Escherichia coli, and Salmonella spp. in the ileal content were lower (P < 0.05) in groups treated with oil (1.5 mL/kg) vs. control group. Thus, dietary supplementation with antimicrobial CCPO (1.5 mL/kg diet) could enhance growth performance, improve health status, and reduce intestinal pathogens in Japanese quails.
为了提供一种安全的生长促进剂，本研究调查了不同水平的冷压丁香油（CCPO）对生长鹌鹑生长性能、胴体特性、血液生化和肠道微生物种群的影响。将 300 只鹌鹑（1 周龄）随机分为 3 个处理组：对照组基础日粮、基础日粮+0.75 mL 油/kg 日粮和基础日粮+1.5 mL 油/kg 日粮。饲喂 1.5 mL 丁香油/kg 日粮的鹌鹑的活体体重比对照组提高了 3.43%。日体重增加也有类似的趋势。随着丁香油水平的增加，采食量逐渐增加（P < 0.01）。整个时期（1 至 6 周龄）的最佳饲料转化率报告为对照组，其次是用 1.5 mL CCPO/kg 日粮处理的组。1.5 mL CCPO/kg 日粮组的总球蛋白差异显著。抗氧化酶活性、脂质谱和还原型谷胱甘肽浓度均呈剂量依赖性显著改善。补充 1.5 mL CCPO/kg 日粮的鹌鹑的血尿素氮、肌酐、丙二醛、8-羟基-2′-脱氧鸟苷和蛋白质羰基水平与对照组相比显著降低。补充 1.5 mL CCPO/kg 日粮的鹌鹑的血清胰岛素样生长因子-1、胰岛素、生长激素和甲状腺素水平与对照组相比显著增加。回肠内容物中的肠道细菌种群、大肠菌群、大肠杆菌和沙门氏菌的数量在油（1.5 mL/kg）处理组中低于对照组（P < 0.05）。因此，日粮中添加抗菌 CCPO（1.5 mL/kg 日粮）可以提高鹌鹑的生长性能，改善健康状况，减少肠道病原体。
