Microbiology Department, Faculty of Agriculture, Zagazig University, Zagazig 44111, Egypt.
Poultry Department, Faculty of Agriculture, Zagazig University, Zagazig 44111, Egypt.
Poult Sci. 2019 May 1;98(5):2139-2149. doi: 10.3382/ps/pey568.
This study was performed to study the impacts of rosemary cold-pressed oil (RCPO) for biostimulating health, growth performance, and intestinal bacterial populations of Japanese quail. The study included 300 growing 1-wk-old Japanese quails. Birds were divided into 3 groups in a complete randomized design experiment that involved 3 levels of RCPO (0, 1.00 and 2.00 mL/kg diet). Results revealed that the addition of rosemary oil numerically increased values of body weight and body weight gain when compared with the control group, particularly the highest level of RCPO (2.00 mL/kg diet). Birds fed diets supplemented with rosemary oil consumed more feed (P ≤ 0.01) compared with those fed the control diet. Feed conversion ratio tended to be improved in rosemary oil groups during the period 3 to 6 wk of age (P = 0.013). The highest level of rosemary oil (2.00 mL/kg diet) had the best impact on all carcass traits studied. RCPO supplementation showed an increase in serum total protein, metabolic hormones levels, while it reduced serum cholesterol and low-density lipoprotein cholesterol, 8-hydroxy-2'-deoxyguanosine, and protein carbonyl levels. Moreover, RCPO increased antioxidative enzymes, and reduced the lipid peroxidation in quail liver. The supplementation of 2 mL/RCPO kg diet showed significant reduction in populations of total cultural bacterial count, coliforms, Escherichia coli, and Salmonella spp. in the ileum when compared to the control. The current results showed that RCPO supplementation to Japanese quails diet could enhance the growth performance and reduce the intestinal pathogenic bacteria. Therefore, RCPO can be a beneficial antimicrobial and growth-promoting feed supplement for the Japanese quail.
本研究旨在研究迷迭香冷压油（RCPO）对鹌鹑健康、生长性能和肠道细菌种群的生物刺激作用。研究包括 300 只 1 周龄的生长鹌鹑。鸟类被分为 3 组，采用完全随机设计实验，涉及 RCPO（0、1.00 和 2.00 ml/kg 饮食）的 3 个水平。结果表明，与对照组相比，迷迭香油的添加数值上增加了体重和体重增加，特别是最高水平的 RCPO（2.00 ml/kg 饮食）。与对照组相比，饲喂添加迷迭香油的日粮的鸟类消耗更多的饲料（P≤0.01）。在 3 至 6 周龄期间，迷迭香油组的饲料转化率有改善的趋势（P=0.013）。最高水平的迷迭香油（2.00 ml/kg 饮食）对所有研究的胴体性状都有最佳的影响。RCPO 补充剂增加了血清总蛋白、代谢激素水平，同时降低了血清胆固醇和低密度脂蛋白胆固醇、8-羟基-2'-脱氧鸟苷和蛋白质羰基水平。此外，RCPO 增加了鹌鹑肝脏中的抗氧化酶，减少了脂质过氧化。与对照组相比，2 ml/RCPO kg 日粮补充剂显著降低了回肠中总培养细菌计数、大肠菌群、大肠杆菌和沙门氏菌的数量。目前的结果表明，RCPO 补充剂可提高鹌鹑的生长性能，降低肠道病原菌。因此，RCPO 可以作为一种有益的抗菌和促生长饲料添加剂用于鹌鹑。
