Elazab Mahmoud A, Khalifah Ayman M, Elokil Abdelmotaleb A, Elkomy Alaa E, Rabie Marwa M, Mansour Abdallah Tageldein, Morshedy Sabrin Abdelrahman
Livestock Research Department, Arid Lands Cultivation Research Institute, City of Scientific Research and Technological Applications, Alexandria 21934, Egypt.
Department of Animal Production, Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt.
Animals (Basel). 2022 Feb 3;12(3):375. doi: 10.3390/ani12030375.
This study was conducted to assess the impacts of using two essential oils, rosemary and ginger, on growing rabbits' performance, carcass traits, meat composition, blood biochemicals, and the redox status of growing New Zealand White (NZW) rabbits. A total of 120 unsexed NZW rabbits, 42-days-old, were assigned randomly to five experimental groups ( = 24, 6 replicates with 4 rabbits each). The first group received a basal diet (control), the second to fifth groups were dietary supplemented daily with rosemary essential oil (REO) and ginger essential oil (GEO) at doses of 0.25 and 0.5% for each supplementation (REO-0.25, REO-0.5, GEO-0.25, and GEO-0.5), respectively. The growth traits were studied for 7 weeks, from the 7th to the 13th week of the rabbits' age. The results revealed that final body weight, weight gain, and average daily gain increased significantly ( < 0.01) in the REO-0.5 and GEO-0.5 treatments compared to the control group. Daily feed intake decreased ( = 0.005) in essential oil treatments. Meanwhile, the feed conversion ratio improved significantly ( = 0.001) in REO and GEO at the high doses compared to the control group. The weight percentages of liver and giblets increased ( < 0.001) with both treatments of REO and GEO compared to the control group. The dietary supplementation with REO and GEO did not affect ( > 0.05) the meat composition of and hind leg muscles. Meanwhile, REO and GEO supplementation significantly decreased cholesterol levels in the rabbit meat. Thiobarbituric acid reactive substance concentrations decreased by 10 and 15% in the meat of REO-0.5 and GEO-0.5 treatments, respectively, compared to the other groups. In the same trend, REO and GEO treatments induced a significant ( = 0.001) reduction in the plasma cholesterol concentrations and triglycerides compared to the control. The total antioxidant capacity increased by 7.60% and the malondialdehyde decreased by 11.64% in the plasma of GEO-0.5 treatment than the control. Thus, the dietary supplementation of REO and GEO have a beneficial effect in improving the productivity and meat quality of growing rabbits.
本研究旨在评估使用迷迭香和姜这两种精油对生长兔的生产性能、胴体性状、肉成分、血液生化指标以及生长中的新西兰白兔（NZW）氧化还原状态的影响。总共120只42日龄未分性别的NZW兔被随机分配到五个实验组（每组 = 24只，每个重复6只，每组4只）。第一组接受基础日粮（对照组），第二组至第五组日粮中每天分别添加剂量为0.25%和0.5%的迷迭香精油（REO）和姜精油（GEO）（分别为REO - 0.25、REO - 0.5、GEO - 0.25和GEO - 0.5）。从兔龄第7周开始到第13周，对生长性状进行了7周的研究。结果显示，与对照组相比，REO - 0.5和GEO - 0.5处理组的终末体重、体重增加量和平均日增重显著增加（P < 0.01）。精油处理组的日采食量降低（P = 0.005）。同时，与对照组相比，高剂量的REO和GEO处理组的饲料转化率显著提高（P = 0.001）。与对照组相比，REO和GEO两种处理均使肝脏和内脏的重量百分比增加（P < 0.001）。日粮中添加REO和GEO对胸肉和后腿肌肉的肉成分没有影响（P > 0.05）。同时，REO和GEO添加显著降低了兔肉中的胆固醇水平。与其他组相比，REO - 0.5和GEO - 0.5处理组兔肉中的硫代巴比妥酸反应物质浓度分别降低了10%和15%。同样，与对照组相比，REO和GEO处理使血浆胆固醇浓度和甘油三酯显著降低（P = 0.001）。GEO - 0.5处理组血浆中的总抗氧化能力比对照组增加了7.60%，丙二醛降低了11.64%。因此，日粮中添加REO和GEO对提高生长兔的生产性能和肉品质具有有益作用。
