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Chicken experiment with oregano phenol
Release time:
2020-12-24
Experiment on the Application of Tiannuokang (10% Thymol) in Broiler Production
Location: Zhangqiu **Livestock Farm**
Test period: 2014.8.6–2.14.09.10
Test subjects: 33-day-old broiler chickens
1. Test Materials and Methods
1.1 Source of Test Materials
10% Thymol from Jinan Tiantianxiang Co., Ltd. Product name: Tiannokang, 100 grams per ton of complete feed.
4% Huangmeisu: Provided by Shengli Co., Ltd.
1.2 Experimental Design
Six thousand one-day-old healthy AA broilers were randomly divided into three groups, with five replicates per group and 400 birds per replicate. Group A: fed a basal diet; Group B: fed a basal diet supplemented with virginiamycin; Group C: fed a basal diet supplemented with virginiamycin plus 10% oregano phenol. The trial lasted 42 days and was divided into two phases: days 1–21 and days 21–42.
1.3 Basal Diet
The experimental basal diet was formulated according to the NRC (1994) feeding standards. The basic ingredients are shown in Table 1.
Table 1: Formulation of the Experimental Basal Diet
| Ingredients (%): |
0–3 weeks of age |
4 to 6 weeks of age |
| Corn |
56.63 |
63.00 |
| Soybean meal |
37.37 |
30.00 |
| Vegetable oil |
2.00 |
3.00 |
| Premix |
4.00 |
4.00 |
| Nutritional ingredients |
||
| Metabolic Energy (ME, MJ/kg) |
12.32 |
12.62 |
| CP (%) |
21.02 |
19.49 |
1.4 Rearing and Management
In this trial, broiler chickens were raised using a floor-based rearing system. Throughout the entire rearing period, the chickens had free access to water and feed, received routine vaccinations, and were managed according to standard practices.
1.5 Testing Items and Methods
Weight Gain: At days 21 and 42, respectively, all experimental chickens in the flock will be weighed in replicate groups. Twelve hours before weighing, feed will be withheld but water will remain available. The fasting weight measurements will be taken at 8:00 a.m. the following morning.
Feed Intake: The feed consumption of the experimental chickens will be recorded weekly. Remaining feed will be collected and recycled, and the total feed consumption, average daily feed intake, and feed-to-weight ratio for each stage will be calculated.
Survival Rate: Record the mortality rate of trial chickens daily and calculate the overall survival rate for each stage of the flock.
1.6 Statistical Analysis
All data from the experiment were analyzed using one-way ANOVA in SAS 8.01.
2 Results Analysis
2.1 Impact on Production Performance
As shown in Table 2, compared with the control group, the addition of virginiamycin and oregano phenol both improved the daily weight gain of broilers and enhanced feed-to-meat ratios. In the early stage, the virginiamycin group and the group receiving a combination of virginiamycin and oregano phenol showed increases in daily weight gain of 2.21% and 3.04%, respectively, compared to the control group, while their feed-to-meat ratios decreased by 2.14% and 3.57%, respectively. In the later stage, the daily weight gain increased by 1.39% and 1.86%, and the feed-to-meat ratio decreased by 1.40% and 1.87%. Over the entire rearing period, the two experimental groups exhibited increases in daily weight gain of 1.74% and 2.31%, respectively, compared to the control group, with reductions in feed-to-meat ratios of 1.59% and 2.12%, respectively. The trial demonstrates that the combined use of virginiamycin and oregano phenol can enhance the production performance of broilers, and the synergistic effect is superior to that achieved by adding virginiamycin alone.
2.2 Impact on Mortality Rates
As shown in the table, compared with the control group, the addition of virginiamycin and oregano phenol both reduced the mortality rate in broilers. The virginiamycin group and the group receiving a combined treatment of virginiamycin and oregano phenol saw reductions of 57.6% and 66.7%, respectively. This indicates that the combined use of virginiamycin and oregano phenol can effectively lower the mortality rate in broilers, and the combined effect is superior to that achieved by adding virginiamycin alone.
Table 3: Effects of Huangmeisu and Thymol on Mortality Rate in Broilers
|
|
0-6 weeks of age |
| Group A |
6.67% |
| Group B |
2.83% |
| Group C |
2.22% |
3 Conclusion
Based on the results of this experiment, whether in terms of broiler daily weight gain, feed-to-meat ratio, or mortality rate, the combined use of virginiamycin and oregano phenol was superior to both the control group (no addition) and the group supplemented with virginiamycin alone.
Note: The above experimental data are obtained from experiments conducted independently by the Tiantianxiang Laboratory.
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