Abstract: In this experiment, 225 Avian broiler chickens of 1 day old were randomly divided into 5 groups, which were basal diet group, Chinese herbal medicine 0.09%, 0.12%, 0.15% added level group, bacitracin zinc group, each group set 3 Repeatedly, each chicken was repeated for 42 days. The experiment used the basal diet group and the bacitracin zinc group as the control to study the effect of the compound Chinese herbal medicine additive on the performance of broiler chickens and the feasibility of replacing the antibiotics. The results showed that there was no significant difference in the average body weight, daily gain, feed intake, feed-to-meat ratio and dead-shoot rate between the Chinese herbal medicine group and the basal diet group (P>0.05). Outside the basal diet group, other indicators were superior to the basal diet group, with the best effect at 0.12%; the Chinese herbal medicine group had no significant difference in performance index compared with the bacitracin zinc group (P>0.05). This indicates that Chinese herbal medicine additives can replace bacitracin zinc in broiler diets.
Key words: Chinese herbal medicine; broiler; production performance
In the middle of the 20th century, antibiotics were widely used as feed additives in the feed industry, and they played an active role in the prevention and control of livestock diseases and growth. However, with the long-term use of antibiotics, the resistance of pathogenic microorganisms and the drug residues in livestock products are becoming more and more serious, which not only reduces the quality of livestock products, but also seriously affects the export of animal products, and also affects human health through the food chain. Destruction of the ecological balance, so many countries began to limit and ban the use of antibiotic feed additives. The current search for the development of safe, green feed additives to replace antibiotics has become an inevitable trend in the development of animal husbandry. In recent years, Chinese herbal medicine has the dual advantages of low cost, pure naturalness, versatility, small side effects, no drug resistance and low residue, and has the dual functions of nutrition and health care. It can be used as a substitute for antibiotics. Great attention has been paid to the vast number of livestock workers in China. In this experiment, the effects of compound Chinese herbal medicine additives on the performance of broiler chickens were studied. The purpose of this study was to explore the feasibility of compound Chinese herbal medicine additives instead of antibiotics and the appropriate level of addition, and provide a scientific basis for the application of Chinese herbal medicine feed additives in production.
1 Materials and methods
1.1 Materials
1.1.1 Selection and grouping of test animals
225 healthy 1 year old Aiwei broilers with similar body weights were selected and randomly divided into 5 groups, including basal diet group and Chinese herbal medicine group (addition levels were 0.09%, 0.12%, 0.15%, respectively) and antibiotic group. Set up 3 replicates, each repeating 15 chickens.
1.1.2 Test diet
According to the standard of broiler breeding in China, the diet is prepared at one time, sampled and stored for testing. The composition of the diet is shown in Table 1.
Table 1 Diet Composition and Nutritional Level %
| Raw material type | Dietary composition | Nutritional index | Nutritional level | ||
| 0 to 3 weeks | 3 to 6 weeks | 0 to 3 weeks | 3 to 6 weeks | ||
| Corn Vegetable oil Calcium hydrogen phosphate Stone powder Salt Premix total | 37.00 2.00 1.80 1.20 0.37 1.00 100 | 62.95 30.00 3.00 1.70 1.00 0.35 1.00 100 | Metabolic Energy / ( / kg) Crude protein Calcium Total phosphorus Methionine Lysine | 2.88 20.97 0.97 0.72 0.45 1.08 | 3.02 18.46 0.86 0.67 0.38 0.93 |
1.1.3 Drugs
According to the physiological characteristics of broiler metabolism, rapid growth, nutrient demand and weak disease resistance, the Chinese herbal compound is formulated with antibacterial and anti-inflammatory, qi and digestion, spleen and stomach, and enhanced immunity. The pepper, oregano, mint, Cinnamon, hawthorn, Divine Comedy, Asparagus, Astragalus, Epimedium, and Licorice are composed of 10 traditional Chinese medicines. First, the active ingredients of various Chinese herbal medicines (except Shenqu) are extracted and dried by different techniques, and then dissolved in a certain proportion, then added to a certain proportion of Divine Comedy, and finally added into the carrier to make a compound Chinese herbal medicine feed additive. The antibiotic used in this test is bacitracin zinc.
1.2 Feeding management
The test chickens were housed in the same house, and each treatment was arranged separately according to the position of the chicken cage in the chicken house and the upper and lower layers to eliminate the influence of environmental factors on the results. The flocks are free to eat and drink freely. Immunization was carried out according to the routine immunization procedure, and the feeding time was 42 days.
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